JP2008281366A - Support unit for microfluid system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a support unit for microfluid systems which does not restrict reactions, number of analytical steps, or quantities and is manufactured easily. <P>SOLUTION: The support unit for microfluid systems is provided with a first support 1 and at least one of hollow filaments 501, 511, and the like which functions as a channel of a microfluid system, the hollow filament is fixed in an arbitrary shape to the first support, and the hollow filament has monolithic structures 301, 311, and the like at prescribed locations in the inside. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a support unit for a microfluidic system, and more particularly to a support unit for a microfluidic system having a monolith structure in a hollow filament fixed to a support and functioning as a flow path.

  In the fields of chemistry and biochemistry, research on miniaturization of reaction systems and analyzers using MEMS (Micro Electro Mechanical System) technology is underway. In conventional research and development, there are mechanical elements (micromachines) having a single function such as a micropump and a microvalve that are one of the constituent elements (see, for example, Non-Patent Documents 1 and 2).

  In order to perform a target chemical reaction or chemical analysis, it is necessary to systematize a plurality of various parts such as micromachines. Generally, a completed form of these systems is called a microreactor system, a micro chemical analysis system (μTAS), or the like. Usually, a micromachine is formed on a silicon chip by applying a semiconductor manufacturing process. It is possible in principle to form (integrate) a plurality of elements on a single chip and systematize them, and such efforts are actually being carried out (for example, see Non-Patent Document 3). However, the manufacturing process is complicated, and it is expected that it is difficult to manufacture it at the mass production level. As a method of forming a fluid circuit (system) by connecting a plurality of micromachines or the like, a chip-type substrate (nanoreactor) is proposed in which a groove is formed by etching or the like at a predetermined position of a silicon substrate and used as a flow path. . This has the advantage that it is much easier to manufacture than the integration method described above. However, the channel cross-sectional area is small and the interface resistance between the fluid and the groove side surface is large, and the channel length is at most in millimeters, and it is difficult to make the channel layer multi-layered. In chemical analysis, the limitations of reaction, type of analysis, number of steps and amount were not overcome.

Furthermore, if the necessary processing can be performed on the fluid in the flow path connecting a plurality of micromachines, etc., the fluid circuit (system) can be made more efficient and downsized. It is desirable to have it. In particular, since this function has a larger surface area per unit length of the flow path, it has been expected that contact with the fluid can be established and further efficiency can be improved.
Shoko, “Chemical Industry”, April 2001, Vol. 52, No. 4, p. 45-55 Maeda, "Journal of Electronics Packaging Society", January 2002, Vol. 5, No. 1, p. 25-26 Inaga, “Proceedings of the 50th Anniversary of Environmental Sciences Conference of the Japan Society of Science”, 1999, No. 14, p. 25-32

  The present invention has been made to solve the above problems. That is, an object of the present invention is to provide a support unit for a microfluidic system that does not limit the number and amount of steps of reaction and analysis and is easy to manufacture. Another object of the present invention is to provide a support unit for a microfluidic system capable of mounting complicated fluid circuits at high density.

  In order to achieve the above object, a first feature of the present invention includes (a) a first support and (b) at least one hollow filament functioning as a flow path of a microfluidic system. The support unit for a microfluidic system is characterized in that the hollow filament is fixed to the first support in an arbitrary shape, and (d) has a monolith structure at a predetermined position inside the hollow filament. This is the gist. In the first feature of the present invention, since a hollow filament is used as a flow path, a multi-function microfluidic system is provided that is highly accurate, easy to manufacture, and that does not limit the number of steps of reaction and analysis. be able to.

  A second feature of the present invention is a support unit for a microfluidic system characterized in that the monolith structure is an organic polymer monolith structure. Thereby, the range of material selection of the monolith structure is widened, and the monolith structure can be provided in accordance with various characteristics (pH, viscosity, polarity) of the fluid and a desired function. Furthermore, since a flexible monolith structure can be obtained, the hollow filament can be bent.

  According to a third aspect of the present invention, there is provided a support unit for a microfluidic system, wherein the monolith structure is an inorganic monolith structure, preferably a silica monolith structure or a titania monolith structure. This is the gist. According to the third aspect of the present invention, it is possible to provide a multifunctional microfluidic system support unit having a monolith structure of an inorganic material.

  According to a fourth aspect of the present invention, there is provided a microfluidic support unit characterized in that a surface modification is applied to a part or all of the monolith structure. In the fourth aspect of the present invention, since the surface of the monolith structure can be modified, the monolith structure can be easily adapted to various characteristics (pH, viscosity, polarity) of the fluid and desired functions. Furthermore, according to the fourth feature of the present invention, even with the same monolith structure (material, pore diameter, porosity), functionality can be exhibited arbitrarily.

  According to the fifth aspect of the present invention, the monolith structure is at least one functional body selected from the group consisting of adsorption / desorption, ion exchange, separation, removal, distribution, oxidation, reduction, and catalyst. The gist of the present invention is a support unit for a microfluidic system. According to the fifth aspect of the present invention, a wide variety of chemical operations such as adsorption / desorption, distribution, separation, and concentration can be constructed sequentially and in multiple stages with a simple structure. As a result, it is possible to provide a more multi-functional support unit for a microfluidic system that does not limit the number of steps of reaction and analysis.

  According to the sixth aspect of the present invention, in addition to at least one hollow filament having a monolith structure at a predetermined position inside, a hollow filament not having a monolith structure is optionally used as the first support. The gist of the present invention is a support unit for a microfluidic system, characterized in that at least one of them is fixed to the shape. Thereby, it is easy to build a complicated flow path system such as analysis and chemical synthesis reaction.

  According to a seventh aspect of the present invention, (b) a first support and (b) a hollow filament functioning as a flow path for the microfluidic system are provided, and (c) the hollow filaments intersect. The microfluidic system support unit is characterized in that it is fixed to the first support in an arbitrary shape and has a monolith structure at a predetermined location inside the hollow filament. And In the seventh aspect of the present invention, the hollow filament can intersect itself or other hollow filaments, both itself and other hollow filaments one or more times, and the hollow filament is densely formed per unit area. Therefore, it is possible to provide a support unit for a small microfluidic system that does not require a place even in a complicated fluid circuit. As a result, the microfluidic system itself can be made compact. Furthermore, according to the seventh feature of the present invention, since the flow paths can be easily crossed, a multi-functional support unit for a microfluidic system that is easy to manufacture and does not limit the number or amount of steps of reaction and analysis. Can be provided.

  According to an eighth aspect of the present invention, there is provided (a) a first support, (b) a hollow filament that functions as a flow path for a microfluidic system, and (e) a second support. (C) The hollow filament is sandwiched between the first support and the second support, (d) and has a monolith structure at a predetermined position inside the hollow filament. The gist of the present invention is a support unit for a microfluidic system. In the eighth aspect of the present invention, it is possible to provide a multi-functional support unit for a microfluidic system that has high accuracy, is easy to manufacture, and does not limit the number and amount of reaction and analysis steps. Furthermore, according to the eighth feature of the present invention, a small microfluidic system support unit can be provided which is less susceptible to breakage of the hollow filament and has excellent handleability.

  According to the present invention, there is provided a support unit for a microfluidic system having a long distance in cm, which uses a hollow filament having a monolith structure as a flow path, is easy to manufacture, and does not limit the number and amount of reaction and analysis steps. I can do it.

  As a result, according to the present invention, it is possible to provide a fluid circuit (microfluidic system) with high accuracy and less manufacturing variation. Furthermore, since a first hollow filament group consisting of a plurality of hollow filaments in a three-dimensional manner and a second hollow filament group consisting of a plurality of hollow filaments crossing the first hollow filament group can be laid, even a complicated fluid circuit has a small microfluid A system can be provided.

  In addition, according to the present invention, it is possible to provide a microfluidic system support unit in which hollow filaments are arranged to form a fluid flow path, and a method for manufacturing such a microfluidic system support unit with high accuracy and less manufacturing variation. .

  Embodiments of the present invention will be described with reference to the drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, the drawings are schematic, and the number and length, the relationship between the thickness and the planar dimensions, the ratio of the thickness of each layer, and the like are different from the actual ones. Therefore, specific thicknesses and dimensions should be determined in light of the following description. These differ depending on the desired function and application and should be determined appropriately. Moreover, it is a matter of course that portions having different dimensional relationships and ratios are included between the drawings.

(First embodiment)
FIG. 1 shows a plan view (b) and a sectional view (a) of a support unit for a microfluidic system according to the present invention. As shown in FIG. 1, the support unit for a microfluidic system according to the first embodiment of the present invention includes a first support 1 and a hollow laid in an arbitrary shape on the first support 1. Filaments 501 to 508 and 511 to 518 and monolith structures 301 to 308 and 311 to 318 are provided at predetermined positions. The hollow filaments 501 to 508 and 511 to 518 constitute a flow path layer for the chemical solution of the support unit for the microfluidic system according to the first embodiment of the present invention.

  The inner and outer diameters of the hollow filaments 501 to 508 and 511 to 518 may be selected according to the purpose, but it is considered that the flow rate per unit time is often in units of milliliters (mL) to microliters (μL). Therefore, the inner diameter is preferably about φ0.01 mm to 2.0 mm. When producing hollow filaments 501 to 508 and 511 to 518 having such diameters, inorganic materials such as glass, quartz and quartz glass, polyimide (PI), polyetheretherketone (PEEK), polyetherimide (PEI) are used. ), Polyphenylene sulfide (PPS), and organic materials such as tetrafluoroethylene / perfluoroalkoxyethylene copolymer (PFA) are particularly suitable. If the inner diameter is φ0.01 mm or less, the influence of the interface resistance between the inner wall surfaces of the hollow filaments 501 to 508 and 511 to 518 and the fluid cannot be ignored, and problems such as clogging are likely to occur. On the other hand, if the inner diameter is larger than φ2.0 mm, a high pressure is required to allow the fluid to flow continuously, increasing the burden on other parts, and introducing bubbles into the fluid. When a chemical reaction is caused in the fluid flowing through the hollow filaments 501 to 508 and 511 to 518, the hollow filaments 501 to 508 and 511 to 518 preferably have chemical resistance.

  The monolith structures 301 to 308 and 311 to 318 applied to the predetermined locations constitute the functional body of the microfluidic system support unit according to the first embodiment of the present invention. The supported function has one or more functions selected from the group consisting of adsorption / desorption, ion exchange, separation, removal, distribution, oxidation / reduction, and catalyst. The monolith structure described in the present invention refers to a continuous and periodic three-dimensional network structure in which a skeleton and voids (through pores) are intertwined in three dimensions. The shape of the skeleton has a spherical aggregate shape or a column shape, or a shape in which these coexist. In addition, the pore diameter of the void (through pore) formed by the three-dimensional skeleton is preferably 0.05 μm to 50 μm. In particular, the average pore diameter is more preferably 0.5 μm to 50 μm. When the hollow filament requires a length in cm, the back pressure of the fluid is high when the average pore diameter is 0.5 μm or less. In addition, when the average pore diameter is 50 μm or more, the strength of the monolith structure is lowered.

  Further, the surface of the skeleton preferably has pores (mesopores) on the order of nanometers (nm), preferably 1 nm to 500 nm. In particular, it is more preferable that the thickness is from 10 nm to 50 nm because the pores can be easily controlled. By having pores (mesopores) on the surface of the skeleton, the specific surface area can be increased. Thereby, a desired function can be made to act on a fluid efficiently. Since a hollow filament having such a monolith structure at a predetermined location is fixed to a base material in an arbitrary shape, it is highly accurate and does not limit the number and amount of steps of reaction and analysis. A system can be provided.

  In addition, since the monolith structure is obtained by phase-converting a solution or suspension (sol), even in a minute region having an inner diameter of about 0.01 mm to 2.0 mm of the hollow filament that functions as the flow path of the present invention, There is a feature that a functional body can be molded freely. As a result, it is easy to manufacture and a multifunctional microfluidic system can be provided.

  As long as the monolith structure of the present invention has the above-described form, a known material or a known manufacturing method can be applied.

  Various materials such as an organic material or an inorganic material can be applied to the monolith structure, and examples thereof include an organic polymer monolith structure made of an organic material, a silica monolith structure made of an inorganic material, and a titania monolith structure. The material of these monolith structures should be appropriately selected according to the desired function and fluid characteristics. For example, when an external force such as bending, vibration, or impact is applied, an organic polymer monolith structure having a more flexible skeleton is preferable. In addition, when the fluid is alkaline having a pH of 8 or more, an organic polymer monolith structure, a silica monolith structure, and a titania monolith structure can be used. When the fluid is repeatedly used continuously, the organic polymer monolith structure is more preferable. Furthermore, when the pH is 10 or more, an organic polymer monolith structure with little performance deterioration due to alkali is preferable.

  In order to exhibit functions such as oxidation / reduction and catalyst, a titania monolith structure having a catalytic action of the skeleton material itself is preferable. In addition, as shown below, a hybrid organic polymer monolith structure, a silica monolith structure, and the like in which a noble metal or metal oxide having a catalytic action is incorporated into the skeleton are also included. As described above, the incorporation of the material into the skeleton widens the range of selection of the skeleton material, and the selection range of the catalyst is wide. The feature is that the combinations can be freely made.

  In the monolith structure, the sizes of the voids (through pores) and the pores (mesopores) can be selected according to the purpose, the sizes of each other can be arbitrarily selected, and the combination can be freely selected. When the sizes of the voids (through pores) and the pores (mesopores) are controlled independently, a silica monolith structure is more preferable. For example, the pores (mesopores) can be prepared by ammonia treatment.

  The material and manufacturing method of the organic polymer monolith structure are desirably selected according to the functions and various characteristics of the fluid, and are not particularly limited. For example, known materials and methods as shown below can be used.

  For example, as an organic polymer monolith structure, Japanese Patent Application Laid-Open No. 2-1747 in which crosslinked polymer microsphere states of 0.05 μm to 0.5 μm are connected to each other, and Japanese Patent No. 3168006 prepared using radical polymerization are used. Gazette, JP-T 2002-536478, which produces a copolymer of divinylbenzene, ethylene glycol dimethacrylate or trimethylolpropane trimethacrylate using supercritical carbon dioxide, solvent-free thermosetting resin such as epoxy and its phase Examples thereof include organic polymer monolith structures obtained by the method and the production method described in Japanese Patent No. 3556551 and Japanese Patent Application Laid-Open No. 2004-244607 which polymerize mixed polyalkylene oxide and polyalkylene glycol. These tend to have a particle aggregation type skeleton.

  Furthermore, it is preferable that the skeleton is columnar because the ratio of voids to the skeleton becomes larger and the back pressure becomes lower. For example, JP 2006-15333 A that polymerizes acrylic or styrene having two or more ethylenic double bonds in the molecule and having a hydroxyl group and / or an amide group under specific conditions, International Publication Number WO 2006 that polymerizes epoxy An organic polymer monolith structure obtained by the structure and production method described in JP0773173 is particularly preferable.

  According to Japanese Patent Laid-Open No. 2006-15333 which polymerizes acrylic or styrene having two or more ethylenic double bonds in a molecule and having a hydroxyl group and / or an amide group under specific conditions, a monomer mixture (crosslinking agent, hydroxyl group and (Or a monomer having an amide group), a diluent, a polymerization initiator, and, if necessary, a suspension mixed with a non-crosslinkable polymer is filled in a container (hollow filament) to perform polymerization. Examples of the cross-linking agent include (meth) acrylate-based cross-linking agents having two or more ethylenic double bonds in the molecule, and (meth) acrylamide-based cross-linking agents. Specifically, glycerin dimethacrylate, ethylene glycol dimethacrylate. More preferred are trimethylolpropane trimethacrylate, methylene bisacrylamide, N, N ′-(1,2-dihydroxyethylene) bis-acrylamide, divinylbenzene, triallyl isocyanurate, or a mixture of two or more thereof. Particularly preferred are divinylbenzene and the like.

  Examples of acrylic or styrene having a hydroxyl group and / or an amide group include glycerin dimethacrylate, 2-hydroxyethyl methacrylate, methylene bisacrylamide, N, N ′-(1,2-dihydroxyethylene) bis-acrylamide, and N-alkyl. Acrylamide, N-vinylalkylamide, 4- (hydroxymethyl) styrene, 4- (acetamidomethyl) styrene and the like are preferable. Considering that the monomer can also serve as a crosslinking agent, it can contribute to the suppression of swelling and shrinkage of the polymer produced, and glycerin dimethacrylate, methylene bisacrylamide, N, N ′-(1,2-dihydroxyethylene) bis. -Acrylamide is more preferable, and considering that there is an advantage that the organic polymer monolith can be easily modified if the monomer has a hydroxyl group, glycerin dimethacrylate, N, N '-(1,2-dihydroxyethylene) Bis-acrylamide is more preferred. These may be used alone or in combination.

  It is preferable to use an epoxy resin for the organic polymer monolith structure because heat resistance is increased. As an organic polymer monolith structure of an epoxy resin having a columnar skeleton (International Publication No. WO2006 / 073173), a combination of an aromatic epoxy resin and a non-aromatic curing agent (alicyclic amine), non-aromatic ( A combination of an alicyclic) epoxy resin and an aromatic curing agent (amine) is mentioned. The epoxy resin and the curing agent are dissolved in porogen and polymerized to obtain an organic polymer monolith structure. A porogen refers to a solvent capable of dissolving an epoxy resin and a curing agent and / or a curing accelerator and capable of causing reaction-induced phase separation after polymerization. Furthermore, the target organic polymer monolith structure may be more easily obtained by adding a curing accelerator.

  Aromatic epoxy resins include bisphenol A type epoxy resins, brominated bisphenol A type epoxy resins, bisphenol F type epoxy resins, bisphenol AD type epoxy resins, stilbene type epoxy resins, biphenyl type epoxy resins, bisphenol A novolak type epoxy resins, Examples include cresol novolac type epoxy resins, polyphenyl-based epoxy resins such as tetrakis (hydroxyphenyl) ethane base, fluorene-containing epoxy resins, triglycidyl isocyanurate, and triazine ring-containing epoxy resins. Non-aromatic curing agents (alicyclic amines) include ethylenediamine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, iminobispropylamine, bis (hexamethylene) triamine, 1,3,6-trisamino. Aliphatic amines such as methyl hexane, polyethylene diamine, trimethyl hexamethylene diamine, and polyether diamine, and alicyclic polyamines such as bis (4-amino-3-methylcyclohexyl) methane are exemplified.

  Further, non-aromatic (aliphatic or alicyclic) epoxy resins include aliphatic glycidyl ether type epoxy resins, aliphatic glycidyl ester type epoxy resins, alicyclic glycidyl ether type epoxy resins, and alicyclic glycidyl ester type epoxies. Resin etc. are mentioned. Examples of the aromatic curing agent (amine) include aromatic amines such as metaphenylenediamine, diaminodiphenylmethane, and diaminodiphenylsulfone, and aromatic acid anhydrides such as phthalic anhydride.

  Lowering the back pressure can reduce the burden on members such as pumps and valves, thereby reducing the cost of the entire system. Furthermore, for example, when the same back pressure is applied, the organic polymer monolith structure can be made longer in the hollow filament, so that the function can be applied to the fluid longer. As described above, when the contact ratio between the monolith structure and the fluid is increased by the length, the hollow filament becomes several tens centimeters to several meters in length and becomes bulky and more difficult to handle. The support unit for a microfluidic system according to the present invention can fix the hollow filament to the support in an arbitrary shape. Therefore, the microfilament system is compact and excellent in handleability by intersecting the hollow filament with a bent portion such as a spiral. A functional microfluidic system can be obtained.

  Typical examples of inorganic monolith structures made of inorganic materials include silica monoliths and titania monoliths, which are obtained by causing a sol-gel transition with phase separation in a reaction solution containing silica or titania as the main component. . For example, examples of the silica monolith structure include International Publication No. WO95 / 03256 and International Publication No. WO98 / 29350, and examples of the titania monolith structure include a method and a production method described in JP-A-6-107461. As a precursor of the skeleton component that causes gel formation, metal alkoxides, complexes, metal salts, organically modified metal alkoxides, organic cross-linked metal alkoxides, and multimers that are partial hydrolysis products and partial polymerization products thereof are used. Can do. Specifically, titanium alkoxide includes titanium (IV) ethoxide, titanium (IV) n-propoxide, titanium (IV) i-propoxide, titanium (IV) n-butoxide, titanium (IV) sec-butoxide, Titanium (IV) t-butoxide. Other suitable alkoxides include, for example, titanium (IV) isoamyloxide, titanium (IV) n-capryloxide, and the like.

  The silicon alkoxide includes tetraethyl orthosilicate, tetrapropyl orthosilicate, tetrabutyl orthosilicate, and the like. Other suitable silicon alkoxides include, for example, tetramethylorthosilicate, methyltriethoxysilane, octadecyltriethoxysilicate, vinyltriethoxysilane, allyltriethoxysilane, phenyltriethoxysilane, triethoxysilane, and the like. These are all commercially available. In addition, it may be prepared by a method described in the literature [“organosilicon compound”, buoy bazanto, buoy shabarovskiy and jay latbuskiy, Academic Press, New York, 1965]. An ethoxy compound is more preferable. This compound is less toxic than the corresponding methoxy compound and reacts more rapidly than the corresponding propoxy, butoxy and higher homologous compounds. Most preferred is tetraethylorthosilicate.

  Furthermore, it can be obtained by sol-gel transition by changing the pH of water glass or other silicate aqueous solutions.

  Also useful are organic polymer monolith structures and silica monolith structures containing inorganic materials and precious metals. For example, “Annual Report of The Murata Science Foundation No. 19 (2005) 81-83”, JP-A No. 2003-326166, JP-A No. 2002-66319 and the like can be mentioned.

  The monolith structure according to the present invention is manufactured using heat, light, radiation, or the like.

  It is preferable to introduce a predetermined DNA probe, antibody, or ion exchange group on the surface by surface modification of the monolith structure shown by the present invention, since the usage can be expanded for biologically related reactions and analysis. Furthermore, when a metal or a catalyst is supported, it can be used as a reaction system for environmental and synthetic chemistry such as decomposition of toxic gas and high efficiency reaction. These methods include coating, plating, graft polymerization, radiation graft polymerization, and surface modification. Specifically, coating by interaction (adsorption) with the surface of the monolith structure, plating for depositing a composite metal incorporating a metal, plastic, or inorganic substance by chemical reduction and / or electroreduction, or monolith structure Graft polymerization that introduces desired molecules using double bonds and various reactive groups remaining on the surface, radiation graft polymerization that introduces molecules after creating reactive sites in monolith structures using electron beams, and The modification includes changing the molecular structure of the molecular chain on the surface of the monolith structure by using chemicals or light to change the properties. In particular, the electron beam graft polymerization method irradiates a predetermined portion of a hollow filament with high-energy radiation such as an electron beam or gamma ray to generate a radical, and a glycidyl methacrylate (GMA) monomer is allowed to flow through the hollow filament to generate a graft polymerization side chain. . The target functional group is introduced into this side chain. It is preferable to introduce a functional group at a predetermined position of a hollow filament having an arbitrary shape because various functions can be imparted. Furthermore, when plating is used as the surface modification method, a monolith structure having a surface of a material (such as a metal) that cannot be directly produced as a monolith structure can be obtained. For example, the obtained material is a metal such as nickel, gold, silver, copper, or palladium. In particular, nickel can be used to obtain a plating film containing eutectoid such as phosphorus or boron, or a plating film containing a fluororesin.

  In particular, examples of the modification method include a particle surface modification method that has been used in a particle-packed separation / analysis column.

  These modification methods include a method of making a monolith structure in a hollow filament and then making a modification by bringing various chemicals into contact with each other, or a method of modifying a previously prepared monolith structure and then putting it in the hollow filament Etc. In the case of an organic polymer monolith structure, the above-mentioned materials can be used as the skeletal material. In particular, when an organic polymer monolith structure derived from a monomer containing a reactive functional group in the molecular chain is used, the subsequent surface modification is easy. Is preferable. Examples of the reactive functional group include an epoxy group, a sulfone group, a hydroxyl group, an amino group, and an amide group.

  In order to prevent damage to the monolith structure, a method of modifying the monolith structure after producing it in the hollow filament is preferable. As described above, when the method of modifying the monolith structure after producing it in the hollow filament is preferable, the inner diameter of the hollow filament (the outer diameter of the monolith structure) is preferably 1.0 mm or less. Furthermore, it is more preferable when the hollow filament having the monolith structure is not linear but has a curved portion or a crossing portion. Further, the length of the monolith structure is preferably 2 cm or more, and more preferably 5 cm or more. Needless to say, these surface modifications and methods thereof are performed by appropriately determining a desired function.

  The monolith structure shown by the present invention is characterized in that it is at least one functional body selected from the group consisting of adsorption / desorption, ion exchange, separation, removal, distribution, oxidation, reduction, and catalyst. As for these functions, one piece of monolith structure formed in the hollow filament may have only one of the above functions, or may have two or more. When one piece of monolith structure has two or more functions, it is preferable that two functions can be applied to the fluid only by contacting or permeating the fluid once. For example, when the skeleton surface is hydrophobic and the voids (through pores) are 5 to 8 μm, when a mixed liquid containing a solid content with an average diameter of 10 μm or more is flowed, the solids are separated and hydrophobic due to the void (through pore) size. The dissolved components can be separated simultaneously by the distribution of interaction. Such a plurality of functions is preferably a function that exerts the skeleton size and composition of the monolith structure because the manufacturing process is short. Needless to say, the function is exhibited by the properties of the skeleton composition of the monolith structure. For example, in the case of an organic polymer monolith, the main chain molecular structure and the properties of the functional group can be used. For example, when the skeleton is predominantly a hydrophobic group such as an alkyl group, the monolith structure is preferable as a separation medium for reverse layer chromatography because it exhibits hydrophobicity. On the other hand, examples of the hydrophilic group include a hydroxyl group, a carboxyl group, an amino group, a ketone group, and a sulfone group.

  Furthermore, after a monolith structure is produced, if a method for imparting further functions by surface modification or the like is used, functions that cannot be exhibited only by the skeleton size and composition of the monolith structure can be imparted, or desired functions can be freely combined. It is more preferable because it is possible.

  According to the present invention, the monolith structure can be provided at a predetermined position inside the hollow filament and can be provided in the entire inside of the hollow filament, so that the desired function of the monolith structure can be caused to act longer by the fluid. Can be obtained. Furthermore, since two or more monolith structures can be combined in a single hollow filament, two or more functions can be applied to the chemical by simply passing the chemical once through the hollow filament. A multi-functional support unit for a microfluidic system can be provided. When there are two or more monolith structures in one hollow filament, when the monolith structure has the same skeleton size and composition, or when the skeleton size is the same and the composition is different, Multiple monolithic structures with different sizes and compositions, monolithic structures with different skeletal sizes and compositions, or combinations of these can be used, so that multiple functions can act in the hollow filament This is preferable because it can be performed. These two or more monolith structures can be subjected to a surface treatment, and a single monolith structure can have two or more functions as described above. In this case, since it can have more functions than the number of monolith structures in the hollow filament, it is possible to realize a higher-function and efficient functional action on the fluid in one hollow filament. For example, when there are three types (a, b, c) of monolith structures in the length direction of one hollow filament, a is made of epoxy resin and the pore diameter size is 30-50 μm, and b is the same as a. And a particle agglomeration type monolith structure having a pore size of 5 to 10 μm and c of acrylic resin and a pore size of 20 to 50 μm. As a result, it is possible to provide a multi-functional support unit for a microfluidic system that does not limit the number and amount of reaction and analysis steps. Further, it goes without saying that these two or more monolith structures are produced simultaneously or at any time. Furthermore, the fabrication method should be selected according to the desired monolith structure.

  The functions of the monolith structure shown by the present invention can be freely combined according to a desired purpose. The functions expressed by the monolith structure are different depending on conditions such as ambient temperature, fluid temperature, pH, polarity, viscosity, as well as the skeleton size, material, and surface state. The composition and skeleton size of the monolith structure can be selected in accordance with the function to be expressed, and the surface modification method can be appropriately selected to obtain a desired surface and exhibit the function.

  Furthermore, as functional groups having an ion exchange function, cation exchange groups include sulfopropyl, sulfoethyl, sulfonate, phosphate, carboxymethyl, and the like, and anion exchange groups include quarterly aminoethyl, quarterly amino, and diethylamino. And ethyl. These can be introduced singly or in combination, and introduction of a plurality of functional groups is preferred from the viewpoint of multifunctionality.

  It is preferable that the material containing these functional groups is selected in advance and a monolith structure is formed, which is easy to manufacture. Furthermore, the use of the above-mentioned surface modification means that, for example, a large number of hollow filaments in which a monolith structure is formed are prepared in advance, and the monolith structure has a function that meets each request according to needs such as orders from customers. Therefore, it is possible to provide a support unit for a microfluidic system that can be easily manufactured.

  When light is irradiated to the fluid flowing through the hollow filaments 501 to 508 and 511 to 518 to cause a photochemical reaction or spectroscopic analysis, the hollow filaments 501 to 508 and 511 to 518 have light transmittance. good. The light transmittance may be a value according to the purpose, but is preferably 80% or more at the target wavelength, and more preferably 90% or more. The first support 1 and / or the second support 2 at a predetermined location must be transparent, or the hollow filament 58 needs to be exposed as shown in FIG. FIG. 2 schematically shows a support unit for a microfluidic system having a hollow filament exposure window as described above. In the figure, reference numeral 3 is a monolith structure, 8 is an adhesive layer, and 9 is an adhesive layer. An exposed window 59 indicates a hollow filament covered with a metal film.

  Fixing the hollow filaments 501 to 508 and 511 to 518 to the first support 1 is excellent in that it is easy to control various environments such as ambient temperature, electric field, and magnetic field as compared with the case of the hollow filament alone. There are benefits. This is advantageous when a chemical reaction or chemical analysis is performed, and is indispensable particularly in a micro reaction system and an analysis system. In addition, there is an advantage that alignment with parts is easy and easy to connect, and a large number of hollow filaments 501 to 508 and 511 to 518 can be accommodated in a compact manner.

  In the case of performing chemical analysis, it is preferable to have a plurality of hollow filaments 501 to 508 and 511 to 518 in terms of improving work efficiency. In this case, it is preferable that the plurality of hollow filaments 501 to 508 constituting the first hollow filament group have the same length from the viewpoint of equalizing the reaction time, the migration distance, the energy application amount, and the like. Similarly, the plurality of hollow filaments 511 to 518 constituting the second hollow filament group are also required to have the same length. That is, it is important that the amount of energy received from the outside from the inflow portion to the outflow portion of the sample is uniform and that there is almost no difference from the amount of energy received by other hollow filaments. From this point of view, the hollow filaments 501 to 508 and 511 to 518 are sandwiched between two or more supports so that the distribution of heat transmitted to the hollow filaments 501 to 508 and 511 to 518 is uniform. preferable. Moreover, it is better that the thicknesses of the plurality of hollow filaments 501 to 508 constituting the first hollow filament group and the plurality of hollow filaments 511 to 518 constituting the second hollow filament group are uniform.

  In the case as described above, the length of the first hollow filament group having the same length can be different from the length of the second hollow filament group having the same length from each other. The hollow filament group and the second hollow filament group can each have a function desired to be exhibited. Further, although not shown, a third hollow filament group can be provided. The number of the third hollow filaments may be one or plural, and in the case of a plurality of the third hollow filaments, the same advantages as described above can be further added by being equal to each other. For example, the third hollow filament group consists of four hollow filaments, three of which are equal in length to each other and can be combined such as different lengths from the first hollow filament group and the second hollow filament group. It is. In these cases, hollow filaments having the same length can have different fixing patterns, inner diameters, and outer diameters. However, in this case, when the same back pressure is applied as described above, the four fluids do not flow down simultaneously.

  As the hollow filaments 501 to 508 and 511 to 518, commercially available tubes of various materials can be used, and those of any material are selected according to the purpose. For example, polyvinyl chloride resin (PVC), polyvinylidene chloride resin, polyvinyl acetate resin, polyvinyl alcohol resin (PVA), polystyrene resin (PS), styrene / acrylonitrile / butadiene copolymer (ABS), polyethylene resin (PE) , Ethylene-vinyl acetate copolymer (EVA), polypropylene resin (PP), poly-4-methylpentene (TPX), polymethyl methacrylate (PMMA), PEEK, PI, PEI, PPS, cellulose acetate, tetrafluoroethylene resin (PTFE), tetrafluoride / hexafluoropropylene resin (FEP), PFA, ethylene tetrafluoride-ethylene copolymer (ETFE), ethylene trifluoride chloride (PCTFE), vinylidene fluoride (PVDF), polyethylene terephthalate Resin (PET), Polyamide Organic materials such as resin (nylon), polyacetal (POM), polyphenylene terephthalate (PPO), polycarbonate resin (PC), polyurethane resin, polyester elastomer, polyolefin resin, silicone resin, polyimide resin, and inorganic materials such as glass, quartz, and carbon There is material.

  What is necessary is just to select the material, shape, size, etc. of the 1st support body 1 and the 2nd support body 2 according to the objective. The appropriate range of plate thickness and film thickness varies depending on the purpose and required function. For example, when electrical insulation is required, a polyimide film such as an epoxy resin plate or a polyimide resin plate used for printed wiring boards or the like, or a DuPont Kapton film used for flexible wiring boards, etc. PET film as represented by Lumirror film manufactured by Toray Industries, Inc. is selected. The plate thickness (film thickness) of the first support 1 is preferably thick, and is particularly preferably 0.05 mm or more. In addition, when heat dissipation is required for the first support 1, a metal foil or plate such as aluminum (Al), copper (Cu), stainless steel, titanium (Ti) is selected. In this case, the plate thickness of the first support 1 is preferably thicker, and particularly preferably 0.5 mm or more. When the first support 1 is required to have optical transparency, a transparent inorganic material plate such as glass or quartz plate, or a transparent organic material plate or film such as polycarbonate or acrylic is selected. The plate thickness (film thickness) of the first support 1 is preferably thin, and particularly preferably 0.5 mm or less. Further, a so-called flexible circuit board or printed circuit board in which a metal pattern such as copper is formed on the surface of the first support 1 by etching or plating may be used. This enables micromachines, heating elements, piezoelectric elements, various sensors such as temperature, pressure, strain, vibration, voltage, and magnetic field, electronic components such as resistors, capacitors, coils, transistors, and ICs, as well as semiconductor lasers (LD) and light emission. Terminals and circuits for mounting various components and elements such as optical components such as a diode (LED) and a photodiode (PD) can be formed, and systemization is facilitated.

  If the adhesive layer 8 is provided on the surface of the first support 1 and / or the second support 2 for the purpose of facilitating the fixation of the hollow filament, the hollow filament can be fixed more reliably and easily. Therefore, it is preferable. For example, a high molecular weight synthetic rubber or a silicone resin adhesive is suitable. Examples of the high molecular weight synthetic rubber adhesive include polyisobutylene such as Vistanex MML-120 manufactured by Tonex, acrylonitrile butadiene rubber such as Nipol N1432 manufactured by Nippon Zeon, and Hypalon 20 manufactured by DuPont. For example, chlorosulfonated polyethylene can be used. Furthermore, a crosslinking agent can be added to these materials as necessary. In addition, Nitto Denko Corporation No. Acrylic resin adhesive tapes such as 500 and 3-10 A-10, A-20, and A-30 can also be used. Silicone resin-based adhesives are silicones mainly composed of high molecular weight polydimethylsiloxane or polymethylphenylsiloxane and having a silanol group at the terminal and a silicone resin such as methylsilicone resin or methylphenylsilicone. Adhesive is suitable. Various cross-linkings may be performed to control the cohesive force. For example, the crosslinking can be performed by a silane addition reaction, an alkoxy condensation reaction, an acetoxy condensation reaction, a radical reaction with a peroxide, or the like. Commercially available adhesives such as YR3286 (manufactured by GE Toshiba Silicone Co., Ltd., trade name), TSR1521 (manufactured by GE Toshiba Silicone Co., Ltd., trade name), DKQ9-9909 (manufactured by Dow Corning Co., Ltd., trade name), etc. There is.

  A photosensitive adhesive may also be used. For example, a dry film resist or solder resist ink used as an etching resist for a printed circuit board, a photosensitive build-up material for a printed circuit board, or the like can be applied. Specifically, there are H-K440 manufactured by Hitachi Chemical Co., Ltd. and Provimer manufactured by Ciba Geigy. In particular, a photovia material provided as a build-up wiring board application can withstand a printed wiring board manufacturing process and a component mounting process using solder. Such materials include compositions containing copolymers or monomers having functional groups that can be crosslinked by light and / or mixing functional groups and thermal polymerization initiators that can be crosslinked by heat in addition to light. Any composition can be used. Examples thereof include alicyclic epoxy resins such as epoxy resins, brominated epoxy resins, rubber-modified epoxy resins, and rubber-dispersed epoxy resins, or bisphenol A-based epoxy resins and acid-modified products of these epoxy resins. In particular, when photocuring is performed by light irradiation, modified products of these epoxy resins and unsaturated acids are preferred. Examples of the unsaturated acid include maleic anhydride, tetrahydrophthalic anhydride, itaconic anhydride, acrylic acid, and methacrylic acid. These can be obtained by reacting an unsaturated carboxylic acid at a blending ratio equal to or less than the equivalent of the epoxy group of the epoxy resin. In addition, thermosetting materials such as melamine resins and cyanate ester resins, or combinations of these with phenol resins are also preferable applications. Besides, the use of a flexibility imparting material is also a suitable combination. Examples thereof include butadiene acrylonitrile rubber, natural rubber, acrylic rubber, SBR, carboxylic acid-modified butadiene acrylonitrile rubber, carboxylic acid-modified acrylic rubber, crosslinked NBR particles, Examples thereof include carboxylic acid-modified crosslinked NBR particles. By adding such various resin components, it is possible to impart various properties to the cured product while maintaining the basic performance of photocuring property and thermosetting property. For example, a combination with an epoxy resin or a phenol resin makes it possible to impart good electrical insulation to the cured product. When a rubber component is blended, tough properties are imparted to the cured product, and the surface of the cured product can be easily roughened by surface treatment with an oxidizing chemical solution, facilitating lamination.

  Ordinarily used additives (polymerization stabilizer, leveling agent, pigment, dye, etc.) may be added. Also, there is no problem with blending a filler. As fillers, inorganic fine particles such as silica, fused silica, talc, alumina, hydrated alumina, barium sulfate, calcium hydroxide, aerosil, calcium carbonate, organic fine particles such as powdered epoxy resin and powdered polyimide particles, powdered polytetra Examples include fluoroethylene particles. These fillers may be subjected to a coupling treatment in advance. These dispersions are achieved by a known kneading method such as a kneader, a ball mill, or a bead mill. As a method for forming such a photosensitive resin, a method in which a liquid resin is applied by a method such as roll coating, curtain coating, or dip coating, or a method in which an insulating resin is formed on a carrier film and laminated with a laminate is used. I can do it. Specifically, there is a photo via film BF-8000 manufactured by Hitachi Chemical Co., Ltd.

  An adhesive layer is formed by applying or laminating the above-mentioned adhesive in the form of a support, and a flow path layer is formed by laying and fixing hollow filaments having hollow filaments or monolith structures formed therein. Form.

  As a method of laying the hollow filament, a known laying method can be used. For example, a method of laying on the above-mentioned adhesive layer (in this case, the structure may be such that the hollow filament is embedded in the adhesive layer). ) And a method of fusing hollow filaments to a support (a method of melting and fixing at least a part of a hollow filament or a support, in which case a part of the hollow filament is embedded in the support Or a method of laying while using an adhesive on the support, or forming a concave pattern by etching or the like at the place where the hollow filament of the support or the adhesive layer is laid, Examples thereof include a method of laying a hollow filament.

  As a concrete laying method, a commercially available device such as an NC wiring device can be applied. For example, a device laid while applying a load and an ultrasonic wave to a conducting wire (hollow filament), a load on the conducting wire (hollow filament) And a device for laying while irradiating a laser beam, a device for applying a load to a conductive wire (hollow filament), and wiring to an adhesive layer, and the like can be used.

  The NC wiring device is numerically controlled and output control of ultrasonic vibration and load is possible. By using this NC wiring device, the laying pattern of the hollow filament can be precisely controlled. While moving horizontally, the hollow filament can be laid in a desired pattern on the support (via the adhesive layer) and on the laid hollow filament while applying a load and ultrasonic vibration to the hollow filament.

  The hollow filament to be laid may be a hollow filament before the monolith structure is formed or a hollow filament after the monolith structure is formed in the hollow filament. Therefore, the formation of the flow path layer is the first support. After the hollow filament is laid on the body, the monolith structure is formed in the hollow filament, or conversely, the hollow filament after the monolith structure is formed is laid on the first support. A support unit for the fluid system can be made. In addition, after the monolith structure is formed in the hollow filament, the residue derived from the monolith precursor can be removed from the hollow filament, or the monolith structure can be surface-modified.

  The structure and shape of the port for injecting fluid into the hollow filament from the outside and / or discharging it to the outside may be arbitrary. For example, a method of forming a hole having a diameter equal to or smaller than the inner diameter or outer diameter of the hollow filament by laser processing or cutting, and capping with silicone rubber, or a needle having the same diameter. There is a method of inserting the needle into the tube and fixing the needle. The size of the hole or needle is basically arbitrary, but if it becomes more than double, the wasteful capacity will increase and the benefits of microfabrication will decrease, or it will cause mixing of bubbles, etc. Caution must be taken.

(Second Embodiment)
FIG. 3 shows a plan view (c) and cross-sectional views (a, b) of a support unit for a microfluidic system according to a second embodiment of the present invention. FIG. 3 is a schematic diagram of a support unit for a microfluidic system formed of a hollow filament having an arbitrary shape having a monolith structure at a predetermined position. The monolith structures 3011, 3012, 3013, 3014, 3031, 3071, and 3081 provided at predetermined locations constitute the functional body of the microfluidic system support unit according to the second embodiment of the present invention.

  According to the present invention, in addition to the hollow filaments 501, 503, 507, 508 having the monolith structures 3011, 3012, 3013, 3014, 3031, 3071, 3081, the hollow filaments 502, 504, 505 having no monolith structure are included. 506, a support unit for a microfluidic system is obtained. Such a support unit for a microfluidic system includes a hollow filament for delivering a reference while performing functions such as synthesis reaction and separation in the monolith structures 3011, 3012, 3013, 3014, 3031, 3071, and 3081. I can do it. For example, when the monolith structure 3071 formed in the hollow filament 507 has a separation column function capable of on-column detection by UV, the specimen can be simultaneously passed through the hollow filaments 507 and 506 and the hollow filament 506 can be used as a reference. . This is useful when designing a system such as a microreactor or μ-TAS, and provides a support unit for a multifunctional microfluidic system that is easy to manufacture and does not limit the number of steps of reaction and analysis. I can do it.

  According to the present invention, the monolith structure can be provided at a predetermined position inside the hollow filament, and can be provided on the entire inside of the hollow filament. For example, it can be provided on the entire inside of the hollow filament 503 like a monolith structure 3031. In such a case, since the entire flow path length of the hollow filament 503 can be used, it is preferable because the function of the monolith structure can be made longer and act more on the fluid. Furthermore, a part of the hollow filament 507 can be provided like the monolith structure 3071. In particular, in the case where the monolith structure 3071 has only in the support plane, when heat or light is applied from the outside, the constituent materials such as the support around the monolith structure 3071 are the same. Therefore, for example, when energy such as electromagnetic waves, heat, and light is applied, the energy environment around the monolith structure 3071 tends to be uniform, and the function of the monolith structure 3071 becomes uniform in the length direction, which is preferable.

  Two monolith structures can be combined in one hollow filament 501 like monolith structures 3011, 3012, 3013, and 3014 at predetermined locations inside the hollow filament 501 in FIG. It is preferable because a plurality of functions can be applied to the chemical solution by passing the chemical solution once through the hollow filament 501. That is, it is possible to provide a multi-functional support unit for a microfluidic system that does not limit the number and amount of reaction and analysis steps.

  Further, when the monolith structures 3071 and 3081 in FIG. 3 have the same length, the same structure, and the same composition, for example, when the sample is fed simultaneously to the hollow filaments 507 and 508 at the same flow rate, the analysis result is obtained almost simultaneously. It is easy and preferable. It is preferable that the hollow filaments 507 and 508 have the same length, because the back pressure applied to both the hollow filaments 507 and 508 is almost the same, and the result can be obtained at the same time with one liquid feed pump.

  The monolith structures 3011, 3012, 3013, 3014, 3031, 3071 and 3081 constituting the functional body of the microfluidic system support unit according to the second embodiment of the present invention shown in FIG. In case of the same monolith structure, in case of monolith structure with the same skeleton size and different composition, in case of monolith structure with different skeleton size and the same composition, or monolith with different skeleton size and composition In some cases, the structure is a structure, and these can be combined to form a multifunctional microfluidic system support unit. The monolith structures 3011, 3012, 3013, and 3014 formed inside the hollow filament 501 can have various combinations of skeletons, compositions, and functions, and a plurality of functions can be caused to act by a single liquid feeding. Possible and preferred. The monolith structure 3011, 3012, 3013, 3014, 3031, 3071, 3081 in FIG. 3 can be subjected to surface modification treatment, and a single monolith structure can have two or more functions as described above. is there. In this case, since it can have more functions than the number of monolith structures in the hollow filament, it is possible to implement a functional action on the fluid with higher functionality and efficiency in one hollow filament. In FIG. 3, the hollow filaments 501 to 508 are described in substantially the same length and the same shape (straight line), but these are not limited to the actual form, particularly the length and the linear shape. Needless to say, each should be fixed to a desired length and shape.

(Third embodiment)
FIG. 4 shows a plan view (a, b) and a sectional view (c) of a support unit for a microfluidic system according to a third embodiment of the present invention. FIG. 4 shows a support unit for a microfluidic system having a functional body composed of the monolith structures 31, 32, and 33. According to the present invention, the hollow filament 51 in which the monolith structure 31 is formed at a predetermined position on the inner side intersects with its own hollow filament 51, so that the hollow filament 51 can be fixed at a higher density. Furthermore, the hollow filament 51 of FIG. 4 provides a compact and compact support unit for a microfluidic system even with a hollow filament having a length of centimeter to metric order by crossing with itself several times more than once. This is preferable.

  FIG. 4B is a schematic diagram of a support unit for a microfluidic system according to the third embodiment of the present invention. The hollow filament 51 provided with the monolith structure 31 intersects the hollow filament 53 provided with the monolith structures 32 and 33. Furthermore, the hollow filament 51 can also cross the hollow filament 52 that does not have a monolith structure. There is no limit to the number of crossings, and it is possible to make multiple crossings with one's own hollow filament and other hollow filaments, providing a compact microfluidic system support unit that does not require space even in complex fluid circuits I can do it.

(Other embodiments)
As another embodiment, as shown in FIG. 2 (a), a through hole 9 is provided in a part of a support unit for a microfluidic system, and a time period is provided in a part of a hollow filament 58 by a motor with a cam, for example. When a micropump or microvalve that generates a pulsating flow by deforming the hollow filament at this location by applying a specific force and moving the fluid at this location, the hollow filament 58 is elastic. Good to have. In particular, the hollow filament 58 preferably has a Young's modulus of 10 ³ MPa or less.

  Further, a metal film 59 can be formed on a part of the exposed hollow filament 58 shown in FIG. 2B, and a terminal for applying a voltage or the like can be formed. In this case, copper (Cu), aluminum (Al), nickel (Ni), chromium (Cr), gold (Au), or the like may be formed as a single layer or multiple layers by plating or vapor deposition.

  Furthermore, the first hollow filament group and the second hollow filament group do not necessarily need to be orthogonal to each other at 90 degrees, and may be crossed. As shown in FIG. 4B, it is possible to cross the hollow filament 51 of its own at an arbitrary angle or to cross the other hollow filaments 52, 53 at an arbitrary angle. The restriction of fixing the hollow filament group becomes loose, and a support unit for a more complex microfluidic system can be obtained.

  Further, for example, not only the first and second hollow filament groups as described above but also a third hollow filament group can be laid.

  On the other hand, the hollow filaments do not necessarily need to cross each other, and as shown in FIG. 3, the hollow filaments may be composed only of a first hollow filament group including a plurality of hollow filaments 501 to 508 running in one direction. Moreover, as shown in FIG. 4, you may lay several hollow filaments 51-53 which draw a curve. Further, the curved portion is not limited to an arc that can be drawn with a specific radius of curvature. For example, a shape in which a plurality of arcs of curvature radii are combined is possible. By doing so, it is preferable to use an application that does not need to be more accurate than necessary, because it is not necessary to use a dedicated NC control wiring device, and the cost can be reduced.

  Note that a plurality of hollow filaments do not necessarily have to be laid, that is, a single hollow filament may be provided.

(Production Example 1)
[Preprocessing]
A 1N NaOH aqueous solution was passed through a fused silica capillary (inner diameter: 100 μm, outer diameter: 375 μm, length: 600 mm) manufactured by GL Sciences, and immersed in a 60 ° C. hot water bath for 1 hour to activate silanol groups on the inner wall of the capillary. The capillary was washed with water, filled with 1N HCl, and then immersed in a 60 ° C. water bath for 30 minutes. The capillary was washed with an excess amount of water and then dried.

[Vinyl modification]
Pyridine and vinyltrimethoxysilane were mixed at a volume ratio of 1: 1, filled in the pretreated capillary, and reacted in an oven at 80 ° C. for 24 hours. After the reaction, it was washed with methanol and dried.

[Monolith formation]
Chlorobenzene (0.75 ml) in which polystyrene (15 mg, MW = 3840000) was dissolved, glycerin dimethacrylate (GDMA) (0.25 ml), and 2,2′-azobis (2,4-dimethylvaleronitrile (ADVN)) (2.66 mg) was added, and the mixture was stirred with a stirrer and bubbled with argon gas for 10 minutes, and this mixture was filled into a pretreated capillary and polymerized at 60 ° C. for 24 hours. Was washed with toluene and replaced with acetone.

[Observation]
A part of the capillary was cut to obtain a cross section. When gold was deposited on the cross section by ion sputtering and the surface was observed with a scanning microscope (SEM: HITACHI S-510), the distance between the continuous skeleton having a thickness of about 1.0 to 5.0 μm and the skeleton was 1.0. A particle agglomeration type network structure in which through-pores of ~ 3.0 μm were well intertwined with each other was confirmed. An SEM photograph is shown in FIG. A GDMA polymer monolith structure was formed in the capillary.

  Next, this capillary was bent by hand so that the radius of curvature was about 10 mm to form a ring. The bent part was cut and SEM observation was performed in the same manner as described above. In the monolith structure bent by hand, there was no breakage, no peeling from the inner wall of the capillary, no defects, etc., and there was no change in appearance compared to the former SEM photograph without bending Not observed. An SEM photograph is shown in FIG.

(Production Example 2)
[Preprocessing]
A 1N NaOH aqueous solution was passed through a fused silica capillary (inner diameter: 100 μm, outer diameter: 375 μm, length: 600 mm) manufactured by GL Sciences, and immersed in a 60 ° C. hot water bath for 1 hour to activate silanol groups on the inner wall of the capillary. The capillary was washed with water, filled with 1N HCl, and then immersed in a 60 ° C. water bath for 30 minutes. The capillary was washed with an excessive amount of water and then dried.

[Aminopropyl modification]
THF and 3-aminopropyltriethoxysilane were mixed at a volume ratio of 1: 1, filled into the pretreated capillary, and reacted in an oven at 80 ° C. for 24 hours. After the reaction, it was washed with ethanol and dried.

[Monolith formation]
Tris- (2,3-epoxypropyl) -isocyanurate (TEPIC) (1.6 g, trade name TEPIC manufactured by Nissan Chemical Co., Ltd.) and 4-[(4-aminocyclohexyl) methyl] cyclohexylamine (BACM) (0.37 g ) Was dissolved in PEG200 (7.0 g). This mixed solution was filled into a pretreated capillary, and both ends of the capillary were inserted into a vial filled with the mixed solution and heated at 80 ° C. for 12 hours. The capillary after polymerization was washed with water.

[Observation]
A part of the capillary was cut to obtain a cross section. When gold was deposited on this cross section by ion sputtering and the surface was observed with a scanning microscope (SEM: HITACHI S-510), a continuous columnar skeleton having a thickness of 0.5 to 1.0 μm and the distance between the skeletons were 1. A network structure in which 0.0 to 5.0 μm well-connected through pores were continuously intertwined with each other was confirmed, and a TEPIC polymer monolith structure was obtained. Compared to Production Example 1, a finer network structure with a fine skeleton was confirmed. A SEM photograph is shown in FIG.

  Next, the capillary was bent by hand so that the radius of curvature was about 10 mm to form a ring. This bent portion was cut and observed with an SEM in the same manner as described above. An SEM photograph is shown in FIG. In the monolith structure bent by hand, there was no breakage, no peeling from the inner wall of the capillary, no defects, etc., and there was no change in appearance compared to the former SEM photograph without bending Not observed.

(Production Example 3)
[Preprocessing]
A 1N NaOH aqueous solution was passed through a fused silica capillary manufactured by GL Sciences (inner diameter: 100 μm, outer diameter: 375 μm, length: 600 mm) and immersed in a 60 ° C. hot water bath for 2 hours to activate silanol groups on the inner wall of the capillary. The capillary was washed with water, filled with 1N HCl, and then immersed in a 60 ° C. water bath for 30 minutes. The capillary was washed with an excessive amount of water and then dried.

[Monolith formation]
Urea (2.0 g) and PEG (0.9 g) were dissolved by adding 20 ml of 0.01N acetic acid. Thereafter, under ice cooling, a silane solution (9.0 ml) was added and stirred for 30 minutes. This was stirred at 40 ° C. for 10 minutes and filtered through a filter. This solution was filled in a pretreated capillary and polymerized at 40 ° C. for 24 hours. Next, the both ends of the capillary were heated at 80 ° C. for 10 hours while being immersed in urea water (0.06 g / ml), and then heat-treated at 120 ° C. Thereafter, the capillary was washed with methanol for about 1 hour and heat treated at 330 ° C. for 24 hours to obtain a silica monolith capillary column.

(Production Example 4)
A film having a VHB (F-9473PC) manufactured by 3M which is 250 μm thick and adhesive at room temperature as an adhesive layer on the first support 1 (thickness 75 μm, manufactured by DuPont, trade name: Kapton 300H) Was used. As shown in FIG. 9, slits 4 (4a to 4d) are provided on the surface of the adhesive layer of the first support 1 having the adhesive layer at positions corresponding to the ends of the hollow filaments, and the release layer 6 (6a-6d) was arranged. This release layer can be formed in advance by applying a commercially available release agent or attaching a release film. Next, the NC wiring capable of controlling the output of ultrasonic vibration and load to desired positions of the surface of the adhesive layer and the release layer of the first support 1 and moving the XY table by NC control. Using the apparatus, hollow filaments 501 to 508 made of high-performance engineering plastic tubes (material: PEEK, inner diameter 0.5 mm, outer diameter 1.0 mm) manufactured by Nirei Kogyo Co., Ltd., and then 511 to 518 are laid. The hollow filaments 501 to 508 and 511 to 518 to be laid were subjected to vibration by an ultrasonic wave having a load of 300 g and a frequency of 40 kHz, and an arcuate portion (not shown) having a radius of 25 mm and an intersecting portion were also provided. Further, when laying a second hollow filament group composed of a plurality of hollow filaments 511 to 518, the load and ultrasonic vibration are stopped at a portion intersecting with the first hollow filament group 501 to 508, and the hollow filament The damage was prevented. After laying the second hollow filament group 511 to 518, the first support 1 (support) in which the hollow filament is laid using the DuPont Kapton 300H with an adhesive layer as the second support 2. Unit). Then, using a laser drilling machine for small-diameter drilling for printed circuit boards, a hole with a pulse width of 5 ms and a shot number of 4 shots and moving φ0.2 mm at intervals of 0.1 mm, the desired cutting shown in FIG. Outline processing along the line. Thereafter, a predetermined portion of the first support 1 near the ends of the hollow filaments 501 to 508 and 511 to 518 is removed, and a first hollow filament group consisting of eight hollow filaments 501 to 508 having a total length of 20 cm, and A support unit for a microfluidic system shown in FIG. 1 is produced in which a second hollow filament group consisting of eight hollow filaments 511 to 518 having a total length of 15 cm is exposed at a length of 10 mm at each end. did. There was no breakage of the hollow filament in the laying part in general, especially in the intersecting part.

  As a result, the positional variation of the flow path formed by the first hollow filament group consisting of a plurality of hollow filaments 501 to 508 and the second hollow filament group consisting of a plurality of hollow filaments 511 to 518 is as follows: Within ± 10 μm. When the microfluidic support unit is placed in a temperature controller and kept at 60 ° C., liquid colored ink flows in from one end, and the time until outflow is measured with a measuring device such as a stopwatch, multiple hollows The first hollow filament group composed of the filaments 501 to 508 flowed out from the other end at almost the same timing (± 1 second or less). When the same test was performed on the second hollow filament, the second hollow filament group including a plurality of hollow filaments 511 to 518 also flowed out from the other end at almost the same timing (± 1 second or less).

(Production Example 5)
As the first support 1, an aluminum plate having a thickness of 0.5 mm having S9009 made by Dow Corning Asia, a non-adhesive pressure-sensitive adhesive having a thickness of 200 μm was used. For this, an NC wiring device that can control the output of ultrasonic vibration and load and move the XY table by NC control is used. A PFA tube manufactured by Nissei Electric Co., Ltd. (inner diameter 1.0 mm, outer diameter 1.5 mm) Laying. The hollow filaments 501 to 508 and 511 to 518 to be laid were subjected to vibration with ultrasonic waves having a load of 500 g and a frequency of 40 kHz. The hollow filaments 501 to 508 and 511 to 518 were laid in an arc shape with a radius of 30 mm, and intersecting portions were also provided. In the vicinity of the intersecting portion, the load and the ultrasonic vibration are stopped. The second support 2 is a TPX film (thickness 50 μm) manufactured by Mitsui Chemicals, which has S9009 manufactured by Dow Corning Asia, a non-adhesive pressure-sensitive adhesive having a thickness of 200 μm. The hollow filaments 501 to 508 and 511 to 518 are laminated on the installed support unit by applying heat). At that time, a thermocouple for temperature measurement is embedded in the vicinity of the hollow filaments 501 to 508 and 511 to 518 at the inflow portion, the outflow portion, and the intersecting portion. In the subsequent contour processing, the substrate is cut into a desired shape using a contour processing machine for a printed circuit board. A support body for a microfluidic system having a shape in which a length of 50 mm is exposed from 12 hollow filaments 501 to 508 and 511 to 518 having a total length of 40 cm can be produced by removing a predetermined portion of the support. The positional variation of the flow path formed by the hollow filaments 501 to 508 and 511 to 518 is within ± 20 μm with respect to the design drawing. There is no breakage of the hollow filaments 501 to 508 and 511 to 518 in the entire laid portion, particularly in the cross wiring portion. Furthermore, there were no voids in the entire sheet, and in particular, no air entrapment or voids (bubbles) were observed near the capillaries or at the intersections.

  A film heat FTH-40 manufactured by Kyoritsu Electronics Industry is attached to the entire back surface of the aluminum plate and set to 80 ° C. About 20 ° C. water was introduced from one end, and the temperature of the water flowing out from the other end was measured to be 78 ± 1 ° C. Moreover, each temperature of the inflow part, the outflow part, and the crossing part is 79 ± 0.5 ° C., and temperature control with high accuracy is possible.

(Production Example 6)
A 0.06 mm thick polyphenylene sulfide film (trade name, manufactured by Toray Industries, Inc.) having VHB (F-9473PC) manufactured by 3M which is 250 μm thick and adhesive at room temperature as an adhesive layer on the first support 1. Torelina) was used. Using an NC wiring device capable of controlling the output of ultrasonic vibration and load and moving the XY table by NC control at a desired position of the first support 1, a fused silica capillary (manufactured by Polymicro) ( The inner diameter was 100 μm, the outer diameter was 360 μm, and the length was 600 mm). The capillary was laid with a straight portion and a spiral portion. In the spiral portion, the capillaries were laid so that the pitch between the capillaries was 0.5 mm, and both ends of the capillary were laid in parallel and in the same direction as the circular tangential direction of the spiral portion. The maximum spiral radius of curvature is 10 mm (minimum curvature radius 8.5 mm, 4 turns), 15 mm (minimum curvature radius 14 mm, 2 turns), 20 mm (minimum curvature radius 19.5 mm, 1 turn) Three types were made. In the vicinity of the spiral portion that intersects with its own capillary, the load and ultrasonic vibration were stopped and laid. For the second support 2, the same polyphenylene sulfide film with an adhesive as that of the first support 1 was used and laminated on a support unit in which capillaries were laid by vacuum lamination. Thereafter, the microfluidic system is cut into a shape of 55 mm in length and 90 mm in width as shown in FIG. 4 (a) by using an outline processing machine for a printed circuit board so that both ends of each capillary are exposed as extra lengths of 150 mm. A support unit was prepared. When the capillaries were observed with a microscope, there was no damage to the capillaries in the entire laid portion, particularly in the cross wiring portion. In this way, a capillary having a length of 600 mm could be compactly accommodated in a business card size sheet (effective length in the sheet 300 mm).

(Production Example 7)
Fused silica capillaries (inner diameter: 100 μm, outer diameter: 360 μm, length: 600 mm) manufactured by Polymicro Corporation were prepared, and three types of micros having spiral patterns with maximum curvature radii of 10 mm, 15 mm, and 20 mm were prepared according to the method of Preparation Example 6. A total of six fluid system support units (total length 600 mm, in-seat effective length 300 mm, each extra length 150 mm) were prepared. A GDMA polymer monolith structure was produced in these capillaries using the method of Production Example 1. One end of the capillary was connected to the HPLC apparatus shown below using a capillary connector manufactured by Upchurch, and an H-ν (H: theoretical plate height, ν: linear velocity) plot was prepared. For comparison, eight GDMA polymer monolith capillaries not prepared in the form of sheet prepared in Preparation Example 1 were prepared, and an H-ν (H: theoretical plate height, ν: linear velocity) plot was prepared in the same manner as described above. . The results are shown in FIG.

[Configuration of HPLC system]
Liquid feed pump: KYA DiNa S
Injector: Valco V2 CIAG Inter Nation
Detector: CE-2075UV (manufactured by Jasco) (off-column detection)
Off-column: fused silica capillary (inner diameter 50 μm)
Off-column length: 90mm
[conditions]
Mobile phase: acetonitrile / water = 60/40 (v / v)
Sample: Uracil (1 mg / ml)
Injection volume: 10nL
Temperature: 20 ° C
Detection: UV210nm

  Next, parameters used in the HPLC measurement and to be evaluated will be described based on the assigned symbols, taking the peak of the chromatogram shown in FIG. 11 as an example.

[Parameter description]
(1) Linear velocity: ν
The linear velocity ν is expressed by the following equation.

(Equation 1)
ν = L / t ₀ (1-1)
L: column length, t ₀ : elution time of solute without retention (2) theoretical plate height: H
The theoretical plate height is a column length corresponding to one theoretical plate, and is represented by the following formula.

(Equation 2)
H = σ ² / L = L / N (1-2)
σ: spread of peak (standard deviation of normal distribution), L: column length, N: number of theoretical plates (3) number of theoretical plates: N
The theoretical plate number N is expressed by the following equation.

(Equation 3)
N = (L / σ) ² (1-3)
Or
N = (t _R / σ) ² (1-4)
t _R : Solute elution time
Further, when the peak width W is obtained by the 4σ method,
W = 4σ (1-5)
The theoretical plate number N is expressed by the equations (1-6) and (1-7).

N = 16 × (t _R / W) ² (1-6)
From (W _1/2 ) ² = 8σ ² ln2
N = 5.54 × (t _R / W _1/2 ) ² (1-7)
W: Peak width, W _1/2 : Half width of peak

  From FIG. 10, it was found that both the GDMA polymer monolith produced in a linear capillary and the capillary produced in a capillary fixed in a spiral (curved portion) shape have the separation ability. Thus, it can be seen that a GDMA polymer monolith capillary column was obtained. In particular, a support unit for a microfluidic system in which a capillary is fixed in a spiral shape with a maximum curvature radius of 10 mm, 15 mm, and 20 mm has a GDMA polymer monolith in the capillary and is a sheet-like GDMA polymer monolith capillary column.

  Further, from FIG. 10, three types of sheet-like GDMA polymer monolith capillary columns with different maximum radii of curvature showed no significant change in the theoretical plate height due to the difference in maximum radii of curvature of 10 mm, 15 mm, and 20 mm, and the performance of the separation column It can be seen that there is no influence of the bending method on.

Next, assuming that there is no influence on the separation performance of the maximum curvature radius of the spiral (curved portion), the above-described six sheet-like GDMA polymer monolith capillary columns produced in the capillary having the spiral (curved portion), a linear and sheet Comparison was made with eight capillary columns that were not converted. The average theoretical plate height at a linear velocity of 1 mm / s was compared, and Table 1 summarizes the performance evaluation results.

  From Table 1, the theoretical plate height of the sheet-like GDMA polymer monolith capillary column having a bent portion was 95% with respect to the theoretical plate height of the GDMA polymer monolith capillary column produced in a straight line. Therefore, even when an organic polymer monolith structure is produced in the capillary after fixing the capillary in an arbitrary shape having a bent portion such as a spiral (curved portion) in advance, a GDMA polymer having separation column performance It has been found that monoliths can be made and that the effect of bending on separation column performance is small.

(Production Example 8)
For comparison with Preparation Example 7, a similar experiment was performed using a fused silica capillary (outer diameter 350 μm, length 600 mm) having an inner diameter of 200 μm manufactured by GL Sciences.

  A PET film having a thickness of 0.05 mm having a VHB (F-9473PC) having a thickness of 250 μm as an adhesive layer on the first support 1 (trade name: Tetron (registered trademark) manufactured by Teijin DuPont Films Ltd.) ) Was used. Two samples with maximum curvature radii of 10 mm and 15 mm produced in Production Example 6 were taken and printed in actual size, and fixed to the table with double-sided tape. On this, the 1st support body 1 was put on the table firmly. Utilizing the fact that the first support 1 was translucent and the lower printing was seen through, a capillary having an inner diameter of 200 μm was fixed in the same pattern as in Production Example 6. The same material as that of the first support 1 was laminated as a second support 2 on a support unit having a capillary fixed by a roll laminator. The excess part was removed using a cutter. The part with the capillary was carefully cut so that the cutter blade did not hit the capillary, and the first support 1 and the second support 2 were removed. In this way, the microfluidic system support unit (55 mm long and 90 mm wide) having the same appearance as that of Production Example 6 except that the inner diameter of the capillary is 200 μm and a PET film is used for the first support 1. ) Was produced. This support unit for a microfluidic system has flexibility and can be bent. Even if the bending was repeated 10 times and 20 times by hand, the position of the capillary did not change.

  Next, a GDMA polymer monolith was produced in the capillary of the microfluidic system support unit according to Production Example 1. Further, a GDMA polymer monolith was produced on three linear capillaries with an inner diameter of 200 μm according to Production Example 1, and an H-ν (H: theoretical plate height, ν: linear velocity) plot was made under the same conditions as in Production Example 7. Created. The results are shown in FIG.

  From the results shown in FIG. 12, even if a capillary having an inner diameter of 200 μm is used, a capillary column in which a linear organic polymer monolith structure is produced and a capillary column in which the organic polymer monolith structure is produced in a capillary having a bent portion are theoretical stages. There was no significant difference in height.

(Production Example 9)
A fused silica capillary (manufactured by GL Sciences Inc.) having an inner diameter of 100 μm × outer diameter of 375 μm and an inner diameter of 200 μm × outer diameter of 350 μm was prepared. In accordance with Production Example 1, a GDMA polymer monolith was produced inside the capillary to obtain a GDMA polymer monolith capillary column. This was subjected to a liquid passing experiment using the same apparatus and conditions (described below) as in Preparation Example 7, and a H-ν (H: theoretical plate height, ν: linear velocity) plot was created. The results are shown in FIG.

  As the first support 1, a TPX film (manufactured by Mitsui Chemicals Co., Ltd.) having a thickness of 0.05 mm and having S9009 made by Dow Corning Asia, a non-adhesive pressure-sensitive adhesive having a thickness of 200 μm, was used. On the surface of S9009 of the first support 1, two types of GDMA with different inner diameters were prepared using an NC wiring device that can control the output of ultrasonic vibration and load and move the XY table by NC control. A polymer monolith capillary column was laid in a pattern having an arc portion with a maximum curvature radius of 10 mm. At this time, the GDMA polymer monolith capillary column was vibrated by ultrasonic waves having a load of 250 g and a frequency of 40 kHz. The second support 2 is a TPX film having S9009 similar to that of the first support 1, and is laminated on a support unit in which a GDMA polymer monolith capillary column is laid by vacuum lamination (applying pressure and heat). A support unit for microfluidic system (sheet-like GDMA polymer monolith capillary column) was obtained. There was no breakage of the capillary in the laying part in general, especially in the cross wiring part. Furthermore, there were no voids in the entire sheet, and in particular, no air entrapment or voids (bubbles) were observed near the capillaries or at the intersections.

  An excess portion was removed using a cutter, and 50 mm of each end of the capillary was exposed to make an extra length. The part with the GDMA polymer monolith capillary column was carefully cut so that the cutter blade did not hit the capillary. One end of the exposed capillary was connected to an HPLC apparatus, and a liquid flow experiment was performed to create an H-ν (H: theoretical plate height, ν: linear velocity) plot. The results are shown in FIG.

[Configuration of HPLC system]
Liquid feed pump: KYA DiNa S
Injector: Valco V2 CIAG Inter Nation
Detector: CE-2075UV (manufactured by Jasco) (off-column detection)
Off-column: fused silica capillary (inner diameter 50 μm)
Off-column length: 90mm
[conditions]
Mobile phase: acetonitrile / water = 60/40 (v / v)
Sample: Uracil (1 mg / ml)
Injection volume: 10 nL
Temperature: 20 ° C
Detection: UV210nm

  From FIG. 13, the difference in theoretical plate height changed by bending the GDMA polymer monolith capillary column having an inner diameter of 100 μm from a linear shape to a curvature radius of 10 mm was 1%, and 3% when the inner diameter was 200 μm. From this, it is clear that even when a GDMA polymer monolith is produced in a capillary and fixed to an arbitrary shape having a bent portion such as a curved portion having a curvature radius of 10 mm on a support, the column performance does not deteriorate. became. Therefore, it was found that the GDMA polymer monolith capillary column having an inner diameter of 100 μm and 200 μm has a small influence of bending on the column performance.

  Further, from the results of FIG. 13, the ultrasonic wave and the load applied when the GDMA polymer monolith capillary column is fixed on the first support 1 and the pressure and heat applied during the vacuum laminating are determined by the GDMA polymer monolith. It was revealed that the column performance of the capillary column was not deteriorated.

  Furthermore, when a part of the sheet-like GDMA polymer monolith capillary column used for producing the H-ν (H: theoretical plate height, ν: linear velocity) plot was cut and observed by SEM, the GDMA polymer monolith No structural destruction, peeling from the inner wall of the capillary, or loss was found. Therefore, the ultrasonic wave and load applied when fixing the GDMA polymer monolith capillary column on the first support 1 and the pressure and heat applied during vacuum lamination do not affect the structure of the GDMA polymer monolith. It became clear.

(Production Example 10)
A TEPIC polymer monolith capillary column was prepared according to Production Example 2 on a fused silica capillary (manufactured by Polymicro) having an inner diameter of 100 μm and an outer diameter of 360 μm. After conducting a linear flow experiment using this column in the same manner as in Production Example 9, a support unit for a microfluidic system (sheet-like TEPIC polymer monolith having a pattern with a radius of curvature of 10 mm was produced in the same manner as in Production Example 9. Capillary column) was obtained, and a liquid passage experiment was performed again to create a H-ν (H: theoretical plate height, ν: linear velocity) plot. The results are shown in FIG.

[conditions]
Mobile phase: acetonitrile / 20 mM phosphate buffer aqueous solution: pH 7 = 60/40 (v / v)
Sample: Uracil (0.1 mg / ml)
Injection volume: 10 nL
Temperature: 20 ° C
Detection: UV210nm

  Furthermore, H-ν (H: theoretical plate height, ν: linear velocity) plot was created using benzene as a retained solute. The results are shown in FIG.

[conditions]
Mobile phase: acetonitrile / 20 mM phosphate buffer aqueous solution: pH 7 = 60/40 (v / v)
Sample: benzene (1 mg / ml)
Injection volume: 10 nL
Temperature: 20 ° C
Detection: UV210nm

  From FIG. 14 and FIG. 15, the difference in the theoretical plate height changed by bending to a radius of curvature of 10 mm after being produced in a linear capillary when uracil (without retention) is used as the solute is 5%. In addition, it was found that even in a TPIC polymer monolith capillary column having a performance 10 times or more higher than that of a GDMA polymer monolith capillary column (linear velocity: 1 mm / s, solute: uracil), the influence of bending on the column performance is extremely small. The difference in theoretical plate height when benzene was used as the solute was 5%, and it was found that the influence on the column performance due to bending was extremely small even in the retained solute.

  Further, in the above-mentioned TEPIC polymer monolith capillary column, the ultrasonic wave and load applied when fixing on the first support 1 and the pressure and heat applied during vacuum lamination are the column performance of the TEPIC polymer monolith capillary column. It has become clear that it will not decrease.

  Furthermore, when a part of the sheet-shaped TEPIC polymer monolith capillary column used for the production of the H-ν (H: theoretical plate height, ν: linear velocity) plot was cut and observed by SEM, the TEPIC polymer monolith was No structural destruction, peeling from the inner wall of the capillary, or loss was found. Therefore, also in the TEPIC polymer monolith capillary column, the ultrasonic wave and load applied when fixing on the first support 1 and the pressure and heat applied during vacuum laminating affect the structure of the TEPIC polymer monolith. It became clear that there was no.

(Example 11)
A silica monolith structure was prepared in a capillary according to Preparation Example 3 in a fused silica capillary (manufactured by Polymicro) having an inner diameter of 100 μm and an outer diameter of 360 μm to obtain a silica monolith capillary column. Similar to Production Example 9, a linear flow experiment was performed. The results are shown in FIG.

  Next, a glass epoxy resin plate having a thickness of 0.1 mm and having a VHB (F-9473PC) made by 3M having a thickness of 250 μm was prepared as the first support 1 and cut into a length of 80 mm and a width of 100 mm. . On the first support, the previous silica monolith capillary column was fixed by hand to a pattern having an arc portion having a curvature radius of 10 mm. Both ends were exposed 50 mm each from the top of the first support. As a second support, a PET film (thickness: 0.025 mm, manufactured by Toray) was laminated from the silica monolith capillary column side using a rubber roller to obtain a support unit for microfluidic system (sheet-like silica monolith capillary column). Similar to Example 9, H-ν (H: theoretical plate height, ν: linear velocity) was obtained from a liquid flow experiment in a straight line and a liquid flow experiment in a support unit for a microfluidic system having a pattern with a curvature radius of 10 mm. A plot was created. The results are shown in FIG.

[conditions]
Mobile phase: acetonitrile / 20 mM phosphate buffer aqueous solution: pH 7 = 60/40 (v / v)
Sample: Uracil (1 mg / ml)
Injection volume: 10 nL
Temperature: 20 ° C
Detection: UV210nm

  From FIG. 16, it was found that this silica monolith capillary column has sufficient separation performance. That is, a sheet-like silica monolith capillary column was obtained.

  The difference in theoretical plate height that was changed by bending from a linear shape to a curvature radius of 10 mm was 3%, and it was found that the influence on the column performance by bending was extremely small even in the silica monolith capillary column.

(Production Example 12)
An organic polymer monolith structure was produced inside a capillary in a fused silica capillary (manufactured by Polymicro) having a length of 1000 mm, an inner diameter of 100 μm and an outer diameter of 360 μm according to Production Example 2 to obtain a TEPIC polymer monolith capillary column. Both ends were cut off by 25 mm, and a clean end face was obtained. This TEPIC polymer monolith capillary column was evaluated for the separation performance of alkylbenzene under the following conditions. The obtained chromatograph is shown in FIG.

[Configuration of HPLC system]
System controller: CBM-20A (manufactured by Shimadzu)
Liquid feed pump: LC-10ADVP (manufactured by Shimadzu)
Injector: RHEODYNE7725 (RHEODYNE)
Detector: CE-2075UV (manufactured by Jasco)
Off-column: fused silica capillary (inner diameter 50 μm)
Off-column length: 90mm
[conditions]
Mobile phase: acetonitrile / 20 mM phosphate buffer aqueous solution: pH 7 = 60/40 (v / v)
Linear velocity: 0.58 mm / s
Temperature: 20 ° C
Detection: UV210nm

  Next, a first film composed of a 0.075 mm thick polyimide film (trade name: Kapton 300H, manufactured by DuPont) having 3H VHB (250 μm thick, F-9473PC) as an adhesive layer. Prepare the support 1, use the NC wiring device that can control the output of ultrasonic vibration and load and move the XY table by NC control, and use the TEPIC polymer monolith capillary column (length: 950 mm) used in the previous evaluation. An ultrasonic wave of 40 V and a load of 250 g were applied to the adhesive layer surface of the first support 1 and laid. The laying shape of the TEPIC polymer monolith capillary column has a spiral portion with a pitch between the capillaries of 0.5 mm, and the maximum curvature radius is 20 mm (minimum curvature radius = 17.5 mm, 6 turns). . Both ends of the capillary were laid in a straight line so as to be parallel to each other and in the same direction. The load and the ultrasonic vibration were stopped in the vicinity of the spiral portion that intersected with its own capillary. For the second support 2, a polyimide film with an adhesive similar to that of the first support 1 was used, and was laminated on a support unit in which capillaries were laid by vacuum lamination (applying pressure and heat). Thereafter, the outer shape is processed using a cutter so that both end portions of each capillary are exposed by 70 to 80 mm as extra lengths, and the capillaries are cut into a 55 mm length and 90 mm width as shown in FIG. A support unit for a microfluidic system in which a monolith structure made of TEPIC resin was formed was produced, and a sheet-like TEPIC polymer monolith capillary column was obtained. When the capillary was observed with a microscope, there was no breakage of the capillary in the entire laying portion, particularly in the cross wiring portion. This sheet-shaped TEPIC polymer monolith capillary column is more compact and easier to handle than a bare capillary. Furthermore, since the capillary is protected by the film and the adhesive, the possibility of being damaged or broken by an external force or impact is low. This is because separation / analysis columns are generally expensive, and separation / analysis columns are subject to individual differences, so it is desirable to perform analysis on the same individual (column) as much as possible. It has the feature of meeting the user's wishes.

  The sheet-like TEPIC polymer monolith capillary column thus obtained was connected to an HPLC apparatus in the same manner as described above, and the separation performance of alkylbenzene was evaluated. The obtained chromatograph is shown in FIG.

[conditions]
Mobile phase: acetonitrile / 20 mM phosphate buffer aqueous solution: pH 7 = 60/40 (v / v)
Linear velocity: 1.53 mm / s
Temperature: 20 ° C
Detection: UV210nm

  FIG. 17 and FIG. 18 reveal that a high number of theoretical plates can be maintained even when a TEPIC polymer monolith capillary column is laid in a shape having a curved portion (bent) and formed into a compact sheet.

The back pressure at this time is 6.1 MPa, and it has a lower back pressure and higher resolution than a general particle packed column (inner diameter 4.6 mm, length 150 mm) that requires a back pressure of 20 MPa or more. I found out. That is, a support unit for microfluidic system (sheet-like TEPIC polymer monolith column) having a low back pressure, a high resolution, and an excellent handleability was obtained.

(Production Example 13)
An organic polymer monolith structure was produced inside a capillary in a fused silica capillary (manufactured by Polymicro) having a length of 1000 mm, an inner diameter of 100 μm and an outer diameter of 360 μm according to Production Example 2 to obtain a TEPIC polymer monolith capillary column. Both ends were cut off by 50 mm, and a clean end face was obtained (effective length 900 mm). Next, a first film composed of a 0.075 mm thick polyimide film (trade name: Kapton 300H, manufactured by DuPont) having 3H VHB (250 μm thick, F-9473PC) as an adhesive layer. Prepare the support 1, use the NC wiring device that can move the XY table by NC control and can control the output of ultrasonic vibration and load, the first support the TEPIC polymer monolith capillary column (length 900mm) An ultrasonic wave of 40 kHz and a load of 250 g were applied to the surface of the adhesive layer of the body 1 and laid. The laying shape of the TEPIC polymer monolith capillary column is a motion field track shape combining a semicircular arc portion and a straight portion, the pitch between the capillaries is 0.5 mm, and the maximum curvature radius of the semicircle is 20 mm (minimum curvature radius = 17). 0.5 mm), and the straight portion is 40 mm (4 rounds). Both ends of the capillary were laid in a straight line so as to be parallel to each other and in the same direction. The load and ultrasonic vibration were stopped in the vicinity of the part of the semicircular arc that intersected the capillary. The second support 2 is a PET film (manufactured by Unitika) having a VHB (thickness 250 μm, F-9473PC) made by 3M as an adhesive layer, and vacuum laminating (pressure) And heat was applied), and was laminated on the support unit on which the capillary was laid. Thereafter, the outer shape is processed with a cutter so that both end portions of each capillary are exposed by 50 mm each as an extra length, and cut into a 55 mm vertical and 90 mm horizontal shape as shown in FIG. A support unit for a microfluidic system in which a monolith structure made of TEPIC resin was formed was produced, and a sheet-like TEPIC polymer monolith capillary column was obtained. Nucleosides and nucleobases were separated using the following equipment and conditions. The results are shown in FIG.

[Configuration of HPLC system]
System controller: CBM-20A (manufactured by Shimadzu)
Liquid feed pump: LC-10ADVP (manufactured by Shimadzu)
Injector: RHEODYNE7725 (RHEODYNE)
Detector: CE-2075UV (manufactured by Jasco)
Off-column: fused silica capillary (inner diameter 50 μm)
Off-column length: 90mm
[conditions]
Mobile phase: acetonitrile / 20 mM phosphate buffer aqueous solution: pH 7 = 60/40 (v / v)
Linear velocity: 1.53 mm / s
Temperature: 20 ° C
Detection: UV210nm
Back pressure: 8.6 MPa

  As shown in FIG. 19, a sheet-like TEPIC polymer monolith capillary column capable of satisfactory separation of nucleobases and nucleosides was obtained, although some of them could not be separated.

  Although the present invention has been described in the above form, it should not be understood that the parts and drawings that form a part of this disclosure limit the present invention. From this disclosure, various alternative embodiments, examples and operational techniques will be apparent to those skilled in the art.

FIG. 1 is a diagram showing a configuration of a support unit for a microfluidic system including the monolith structure according to the first embodiment of the present invention. FIG. 1 (b) is a plan view, and FIG. ) Is a cross-sectional view seen from the direction of the arrows AA shown in FIG. FIG. 2A is a bird's-eye view of a support unit for a microfluidic system including a hollow filament exposure window according to an embodiment of the present invention, and FIG. 2B is a microfluidic system according to an embodiment of the present invention. It is the bird's-eye view which showed the exposure form and end part form of the hollow filament with which the support unit for operation is equipped. FIG. 3 is a view showing a configuration of a support unit for a microfluidic system including a monolith structure according to the second embodiment of the present invention, and FIG. 3 (c) is a plan view, and FIG. ) And (b) are cross-sectional views as seen from the directions of arrows AA and BB shown in FIG. 4 (a) and 4 (b) are plan views showing a configuration of a support unit for a microfluidic system including a monolith structure according to a third embodiment of the present invention, and FIG. It is sectional drawing seen from the AA arrow direction shown to 4 (b). 2 is a cross-sectional SEM photograph of a GDMA polymer monolith structure (straight line portion) manufactured according to Example 1; 2 is a cross-sectional SEM photograph of a GDMA polymer monolith structure (bent portion) manufactured according to Example 1; 4 is a cross-sectional SEM photograph of a TEPIC polymer monolith structure (straight line portion) produced according to Example 2. FIG. 4 is a cross-sectional SEM photograph of a TEPIC polymer monolith structure (bent portion) produced according to Example 2. FIG. FIG. 9 is a diagram for explaining a configuration of a support unit for a microfluidic system including a monolith structure according to another embodiment of the present invention, and FIG. 9B is a plan view. (A) is sectional drawing seen from the AA arrow direction shown in FIG.9 (b). 6 is an H-ν plot of a GDMA polymer monolith capillary column (inner diameter 100 μm) produced according to Example 7. FIG. FIG. 11 is a diagram schematically showing a chromatogram peak in order to explain parameters to be used in HPLC measurement and to be evaluated. 10 is an H-ν plot of a GDMA polymer monolith capillary column (inner diameter 200 μm) produced according to Example 8. 10 is an H-ν plot of a GDMA polymer monolith capillary column made according to Example 9. 4 is an H-ν plot of a TEPIC polymer monolith capillary column (solute: uracil) made according to Example 10. 4 is an H-ν plot of a TEPIC polymer monolith capillary column (solute: benzene) produced according to Example 10. 2 is an H-ν plot of a silica monolith capillary column made according to Example 11. 10 is an alkylbenzene chromatograph using a TEPIC polymer monolith capillary column produced according to Example 12. FIG. 10 is an alkylbenzene chromatograph using the sheet-like TEPIC polymer monolith capillary column produced in Example 12. FIG. 14 is a nucleoside and nucleobase chromatograph using a sheet-like TEPIC polymer monolith capillary column prepared according to Example 13. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... 1st support body 2 ... 2nd support body 3, 31-33, 301-308, 311-318 ... Predetermined location where the monolith structure was formed 4, 4a, 4b, 4c, 4d ... Slit 51- 53, 58, 501 to 508, 511 to 518 ... hollow filament 59 ... metal film 6, 6a, 6b, 6c, 6d ... release layer 7 ... cutting line 8 ... adhesive

Claims (13)

  A first support and at least one hollow filament that functions as a flow path of the microfluidic system, the hollow filament being fixed to the first support in an arbitrary shape, and an inner side of the hollow filament A support unit for a microfluidic system having a monolith structure at a predetermined position.   2. The support unit for a microfluidic system according to claim 1, wherein the monolith structure is an organic polymer monolith structure.   The support unit for a microfluidic system according to claim 1, wherein the monolith structure is an inorganic monolith structure.   The support unit for a microfluidic system according to claim 3, wherein the inorganic monolith structure is a silica monolith structure or a titania monolith structure.   The microfluidic support unit according to any one of claims 1 to 4, wherein a surface modification is applied to a part or all of the monolith structure.   The microlith according to any one of claims 1 to 5, wherein the monolith structure is at least one functional body selected from the group consisting of adsorption / desorption, ion exchange, separation, removal, distribution, oxidation, reduction, and catalyst. Support unit for fluid system.   2. From at least one hollow filament not having a monolith structure, in addition to at least one hollow filament having a monolith structure at a predetermined position inside, fixed to the first support in an arbitrary shape. 6. The support unit for a microfluidic system according to any one of claims 6.   The support unit for a microfluidic system according to any one of claims 1 to 7, wherein the hollow filament fixed to the first support in an arbitrary shape intersects the hollow filament itself.   9. The microfluidic system according to claim 1, wherein the hollow filament fixed to the first support in an arbitrary shape intersects at least one other hollow filament. Support unit.   The support unit for a microfluidic system according to any one of claims 8 and 9, wherein the hollow filament intersects a plurality of times.   11. The structure according to claim 1, further comprising a second support, wherein at least one hollow filament is sandwiched between the second support and the first support. The support unit for microfluidic systems according to one item.   The support unit for a microfluidic system according to any one of claims 1 to 11, wherein the monolith structure has an average pore diameter of 0.5 µm or more and 50 µm or less.   The support unit for a microfluidic system according to any one of claims 1 to 12, wherein the hollow filament provided with the monolith structure has a channel cross-sectional diameter of 20 µm or more and 200 µm or less.