US20100130347A1 - Formed article and process for the production thereof - Google Patents

Formed article and process for the production thereof Download PDF

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US20100130347A1
US20100130347A1 US12/089,282 US8928206A US2010130347A1 US 20100130347 A1 US20100130347 A1 US 20100130347A1 US 8928206 A US8928206 A US 8928206A US 2010130347 A1 US2010130347 A1 US 2010130347A1
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polymer
solvent
active substance
dope
formed article
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Ryohichi Nagashima
Haruko Hirose
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Teijin Engineering Ltd
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Teijin Engineering Ltd
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Assigned to TEIJIN ENGINEERING LTD. reassignment TEIJIN ENGINEERING LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HIROSE, HARUKO, NAGASHIMA, RYOHICHI
Publication of US20100130347A1 publication Critical patent/US20100130347A1/en
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/28—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof by elimination of a liquid phase from a macromolecular composition or article, e.g. drying of coagulum
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/0004—Use of compounding ingredients, the chemical constitution of which is unknown, broadly defined, or irrelevant
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/22—After-treatment of expandable particles; Forming foamed products
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/26—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof by elimination of a solid phase from a macromolecular composition or article, e.g. leaching out
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2201/00—Foams characterised by the foaming process
    • C08J2201/04—Foams characterised by the foaming process characterised by the elimination of a liquid or solid component, e.g. precipitation, leaching out, evaporation
    • C08J2201/054—Precipitating the polymer by adding a non-solvent or a different solvent
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2205/00—Foams characterised by their properties
    • C08J2205/04—Foams characterised by their properties characterised by the foam pores
    • C08J2205/05—Open cells, i.e. more than 50% of the pores are open

Definitions

  • This invention relates to a formed article containing an active substance and a process for the production thereof. More specifically, the present invention relates to a formed article having a plurality of cells with an active substance included therein each and a process for the production thereof.
  • Patent Document 1 a membrane having a continuous porous structure having a spinodal separation pattern
  • Patent Document 2 porous spherical particles are known for a support for various catalysts, electrophotographic toners, an electronic material for displays, chromatography, adsorbents, or the like
  • Patent Document 3 As an immobilizing carrier for active matters typified by microorganisms, bacteria and enzymes, further, there has been proposed a microcapsule having a hollow space and a porous capsule wall and having a structure in which porous of the capsule wall communicate with the hollow space in the capsule through fine pores
  • a microcapsule is a fine container formed by covering an inclusion in the form of a solid, liquid or gas with a thin film wall material, and it has functions of protecting an unstable substance, isolating a reactive substance, controlling the diffusion of the inclusion or including an active substance or matter. For causing a microcapsule to exhibit these functions effectively, it is required to ensure that a substance outside the capsule can efficiently contact an included active substance by easy molecular diffusion without causing a pressure loss.
  • microcapsules are formed each of a hollow portion and a shell covering it, the interior of each capsule is hollow, and the space and internal surface area for holding an active substance inside are limited.
  • microcapsules having a large particle diameter each it is required to increase the thickness of a shell for maintaining the strength thereof.
  • an active substance and a substance outside the capsule contact each other only through pores that exist in the shell and have a size of several nm to tens nm, and there is a defect that when the thickness of the shell is increased, the pressure loss by these pores increases and no efficient contact can be attained.
  • active substances are generally fine particles, there is involved a problem that when they are used in a packed column, impractically, the pressure loss is large.
  • the active substance surface is coated with the binder, and no surface area effective for exhibition of a function Can be secured.
  • a binder is caused to include, as a cells-forming agent, an inorganic salt or an organic substance such as starch and the cells-forming agent is removed by washing, etc., after, the formation of capsules.
  • the defect is that no holes communicating with an outside are obtained and that the production cost thereof is also increased.
  • an active substance having physiologically high activity it is required to prevent its direct contact to a human body or its suction into a human body.
  • Patent Document 1 JP 1-245035A
  • Patent Document 2 JP 2002-80629A
  • Patent Document 3 JP 2003-88747A
  • Patent Document 4 JP 2004-25099A
  • Patent Document 5 JP 64-65143A
  • the present inventors have found that when an article is formed by a so-called wet method in which a dope containing a polymer (A) and an active substance is coagulated in a coagulating liquid, there is employed a constitution in which the active substance surface is coated with a polymer (C), whereby a plurality of cells each including active substance coated with polymer (C) are formed in the polymer (A). Further, it has been found that when the formed article is washed with a specific solvent (E) to remove the polymer (C), the active substance in each cell is not held on the internal wall of each cell and a: hollow is formed between the internal wall and the active substance in each cell like a bell with a ringing ball in a cavity inside. That is, it has been found that there can be obtained a structure in which another sphere is included in a sphere that is internally hollow and the included sphere is freely movable.
  • the present inventors have also found that when an article is formed by a so-called wet method in which a dope containing a polymer (A) and an active substance is coagulated in a coagulating liquid, there is employed a constitution in which one of the polymer (A) and the active substance is hydrophilic and the other is hydrophobic, whereby a plurality of cells each including active substance are formed in the polymer (A), the active substance in each cell is not held on the internal wall of each cell and a hollow is formed between the internal wall and the active substance in each cell like a bell with a ringing ball in a cavity inside.
  • pores are formed in polymer (A) by so-called spinodal decomposition to ensure that a substance outside a capsule and the active substance can easily contact each other, and this invention has been accordingly completed.
  • this invention provides a formed article having a plurality of cells formed in a polymer (A), wherein
  • each cell includes an active substance
  • the polymer (A) has pores, the pore connects with other pores in the polymer (A) and the pore has a diameter in the range of 1 nm to 1 ⁇ m, and
  • this invention provides a process for the production of a formed article having a plurality of cells formed in a polymer (A), wherein each cell including an active substance, the process comprises coagulating a dope in a coagulating liquid characterized in that,
  • the dope contains the polymer (A), a solvent (B) and an active substance coated with a polymer (C),
  • the coagulating liquid contains a solvent (D) that is a poor solvent to the polymer (A),
  • the solvent (B) is a good solvent to the polymer (A) and is a poor solvent to the polymer (C).
  • this invention also provides a process for the production of a formed article having a plurality of cells formed in a polymer, wherein each cell includes an active substance, the process comprises coagulating a dope in a coagulating liquid characterized in that,
  • the dope contains a polymer (A), a solvent (B) that is a good solvent to the polymer (A) and an active substance,
  • the active substance is hydrophilic when the polymer (A) in the dope is a hydrophobic polymer or the active substance is hydrophobic when the polymer (A) in the dope is a hydrophilic polymer.
  • FIG. 1 is a transmission electron microscope photograph of a 50 nm thick slice of a spherical formed article in Example 1. A clearance is observed between hydrotalcite and a polymer.
  • FIG. 2 is an enlarged photograph of a clearance portion in FIG. 1 . A 1 to 5 ⁇ m clearance is observed between hydrotalcite and a polymer.
  • FIG. 3 is a transmission electron microscope photograph of a 50 nm thick slice of a spherical formed article obtained when the article was formed without adding any starch paste in Example 1. It is seen that a polymer adheres to a hydrotalcite surface without any clearance between hydrotalcite and the polymer.
  • FIG. 4 is an enlarged photograph of a hydrotalcite and its periphery in FIG. 3 . It is seen that a polymer adheres to a hydrotalcite surface.
  • FIG. 5 is a scanning electron microscope photograph of a yeast plant in a spherical formed article produced in Example 2. It is seen that a 1 to 3 ⁇ m clearance is formed between a spherical yeast plant and a polymer having a fine-porous structure.
  • FIG. 6 is a transmission electron microscope of a 50 nm thick slice of a spherical formed article in Example 2. A clearance is observed between yeast and a polymer.
  • FIG. 7 is an enlarged photograph of the yeast in FIG. 6 . A clearance is observed between the yeast and a polymer.
  • FIG. 8 is a transmission electron microscope of a 50 nm thick slice of a spherical formed article in Example 3. A clearance is observed between activated carbon and a polymer.
  • FIG. 9 is a transmission electron microscope of a 50 nm thick slice of a spherical formed article in Example 3. A clearance is observed between activated carbon and a polymer.
  • FIG. 10 is an enlarged photograph of an activated carbon portion in FIG. 9 . There is no adhesion, and a clearance is observed, between activated carbon and a polymer.
  • FIG. 11 is a transmission electron microscope photograph of a 50 nm thick slice of a spherical formed article obtained when the article was formed without adding any starch paste in Example 3. It is seen that a polymer adheres to an activated carbon surface without any clearance between activated carbon and a polymer.
  • FIG. 12 is a transmission electron microscope photograph of a 50 nm thick slice of a spherical formed article obtained when the articles was formed without adding any starch in Example 3. It is seen that a polymer adheres to an activated carbon surface without any clearance between activated carbon and a polymer.
  • FIG. 13 is an enlarged photograph of an activated carbon portion in FIG. 12 . It is seen that a polymer adheres to an activated carbon surface.
  • FIG. 14 is a schematic drawing of an apparatus used for producing a fibrous formed article in Example 4.
  • FIG. 15 is a scanning electron microscope photograph of a cross section of the fibrous formed article in Example 4.
  • the formed article of this invention is formed from a polymer (A).
  • the polymer (A) includes hydrophobic polymers and hydrophilic polymers.
  • the hydrophobic polymers include an aramid polymer, an acryl polymer, a vinyl alcohol polymer and a cellulose polymer.
  • the hydrophilic polymers include water-soluble starch, polyvinyl alcohol, polyvinyl pyrrolidone, water-soluble cellulose acetate and chitosan.
  • the aramid polymer is preferably a polymer in which at least 85 mol % of aramid bonds are formed of an aromatic diamine and an aromatic dicarboxylic acid component.
  • Specific examples of the aramid polymer include poly-p-phenyleneterephthalamide, poly-m-phenyleneterephthalamide, poly-m-phenyleneisophthalamide, and poly-p-phenyleneisophthalamide.
  • the acryl polymer is preferably a polymer having at least 85 mol % of an acrylonitrile component.
  • a comonomer there is used at least one component selected from the group consisting of vinyl acetate, methyl acrylate, methyl methacrylate and styrene sulfide sulfonate.
  • the formed article of this invention is formed of a polymer (A) having pores in itself.
  • a pore communicates with other pores in the polymer (A), and the pores form a network structure in which the pores are inter-connected.
  • the pores have a diameter in the range of 1 nm to 1 ⁇ m, preferably 10 nm to 500 nm.
  • the pores are formed by a spinodal phenomenon when a dope is coagulated in a coagulating liquid containing a solvent (D) that is a poor solvent to the polymer (A).
  • the pores can be observed on a scanning electron microscope photograph or a transmission electron microscope photograph.
  • a plurality of cells are formed in the formed article of this invention.
  • Each cell includes an active substance.
  • the shapes cells are not uniform.
  • the cells have a size enough to include an active substance each.
  • the internal wall of each cell and the active substance are substantially not in contact with each other. That is, the formed article of this invention has an embodiment in which a polymer (C) is filled between the internal wall of each cell and the active substance and an embodiment in which a space exists between the internal wall of each cell and the active substance.
  • the polymer (C) includes water-soluble polymers such as starch paste.
  • the active substance is preferably at least one member selected from the group consisting of metal oxides, metals, inorganic substances, minerals, synthetic resins and organisms.
  • the metal oxides include titanium oxide, aluminum oxide, zirconium oxide, zinc oxide, silica, etc.
  • the metals include gold, platinum, silver, iron, aluminum, stainless steel, copper, nickel, manganese, etc.
  • the inorganic substances include activated carbon, hydrotalcite, gypsum, cement, etc.
  • the minerals include mica, etc.
  • the synthetic resins include polyethylene, polystyrene, polypropylene, polyester, polyphenylene sulfide, etc.
  • the organisms include microorganisms such as fungus (yeast, etc.), bacteria (collibacilli, etc.), etc., free cells (red blood cells, white blood cells), etc.
  • the particle diameter of the silver is preferably 1 nm to 100 ⁇ m, more preferably 1 nm to 100 nm.
  • one formed article holds active substances of two or more kinds.
  • the active substance preferably has a particulate form.
  • the diameter of the particles is preferably 1 nm to 500 ⁇ m, more preferably 1 nm to 100 ⁇ m, still more preferably 1 nm to 50 ⁇ m.
  • the formed article of this invention preferably has the form of a mass such as a sphere or an ellipsoid, the form of a fiber such as a string, a pipe or a hollow yarn or the form of a film or membrane.
  • the process for the production of a formed article is a process (first embodiment) for the production of a formed article having a plurality of cells formed in a polymer (A), each cell including an active substance, the process comprising coagulating a dope in a coagulating liquid,
  • the polymer (A) and the active substance are those explained with regard to the formed article.
  • the dope may contain two or more active substances.
  • the active substance is coated with a polymer (C).
  • the polymer (C) is a polymer that is incompatible with the polymer (A).
  • the term “incompatible” refers to a state where phase separation occurs when the polymer (A) and the polymer (B) are mixed. More specifically, the above term refers to a state where polymer molecules of different types are not at all mixed on the order of molecules and are separated in phase, a state where polymer molecules are mixed with one another in an interface while they are separated in phase or a state where a mixture of polymers is in separated in phase while the polymers are mixed on the order of molecules in a phase of each.
  • the polymer (C) includes water-soluble polymers such as starch paste, gelatin, dogtooth violet starch, and polyvinyl alcohol.
  • the polymer (A) is a hydrophobic polymer such as an aramid polymer, an acryl polymer or polylactic acid
  • the polymer (C) is a water-soluble polymer such as starch paste.
  • the coating can be carried out by placing the active substance in the polymer (C) that has been melted and stirring them.
  • the thickness of the coating is 10 nm to 10 mm, preferably 100 nm to 1 mm.
  • the solvent (B) is a good solvent to the polymer (A) and a poor solvent to the polymer (C).
  • the good solvent refers to a solvent having large dissolving power to a polymer as is generally said.
  • the poor solvent refers to a solvent having small dissolving power to a polymer as is generally said.
  • the solvent (B) is preferably N-methyl-2-pyrrolidone (NMP).
  • NMP N-methyl-2-pyrrolidone
  • the solvent (B) is preferably dimethyl sulfoxide (DMSO).
  • the solvent (B) is preferably dichloromethane (DCM).
  • the dope preferably contains, per 100 parts by mass of the polymer (A), 100 to 10,000 parts by mass, more preferably 1,000 to 5,000 parts by mass of the Solvent (B).
  • the content of the active substance per 100 parts by mass of the polymer (A) is preferably 100 to 10,000 parts by mass, more preferably 100 to 1,900 parts by mass.
  • the content of the polymer (C) per 100 parts by mass of the active substance is 10 to 1,000 parts by mass, more preferably 10 to 500 parts by mass.
  • the temperature of the dope is preferably 5 to 80° C., more preferably 20 to 50° C.
  • the dope may be prepared by adding the polymer (A) to the solvent (B), fully stirring the mixture to dissolve the polymer (A) and then adding the active substance coated with the polymer (C) or by simultaneously adding and mixing the polymer (A) and the active substance coated with the polymer (C) to/with the solvent (B).
  • the coagulating liquid contains the solvent (D) that is a poor solvent to the polymer (A).
  • the poor solvent refers to a solvent having a little dissolving power to the polymer (A) as is generally said.
  • the solvent (D) is preferably water.
  • the solvent (D) is preferably a mineral oil.
  • the coagulating liquid preferably contains 50 to 100 by mass, more preferably 85 to 100% by mass, of the solvent (D).
  • the other component is N-methyl-2-pyrrolidine or dimethyl sulfoxide.
  • the coagulating liquid may contain a surfactant.
  • the surfactant includes an anionic surfactant, a cationic surfactant, an amphoteric surfactant and a nonionic surfactant.
  • the anionic surfactant includes a higher fatty acid, an alkyl sulfonate, an alkenyl sulfonate, an alkylbenzene sulfonate and ⁇ -olefin sulfonate.
  • the cationic surfactant includes a linear monoalkyl quaternary ammonium salt having 12 to 16 carbon atoms and a quaternary ammonium salt having a branched alkyl having 20 to 28 carbon atoms.
  • the amphoteric surfactant includes an alkylamine oxide whose alkyl group and acyl group have 8 to 18 carbon atoms, carbobetaine, amidobetaine, sulfobetaine and amidosulfobetaine.
  • the nonionic surfactant includes an alkylene oxide, preferably, ethylene oxide (EO).
  • the content of the surfactant per 100 parts by mass of the solvent (D) is preferably 0.05 to 30 parts by mass, more preferably 5 to 10 parts by mass.
  • the temperature of the coagulating liquid is preferably 10 to 80° C., more preferably 20 to 50° C.
  • a network structure of continuous pores having a pore diameter of approximately 1 nm to 1 ⁇ m is formed in the polymer (A) on the basis of what is called spinodal decomposition.
  • the formed article of this invention can be produced without any special apparatus.
  • the formed article in the form of a mass can be produced by adding the dope in the coagulating liquid.
  • the dope can be dropwise added to the coagulating liquid with a sprayer, a syringe or the like.
  • the formed article in the form of a fiber can be produced by discharging the dope into the coagulating liquid through a nozzle and taking up the resulting product.
  • the formed article in the form of a fiber, a string or a pipe can be obtained as well by discharging the dope from the air with a microsyringe or the like to pour the discharged dope into the coagulating liquid while the microsyringe or the like is moved horizontally.
  • the formed article in the form of a film can be produced by applying the dope onto a carrier material and immersing the dope-applied carrier material in the coagulating liquid.
  • the diameter or thickness of the formed article can be adjusted as required by changing the diameter of the spray nozzle, the application thickness or the like.
  • the polymer (A) is poly-m-phenyleneterephthalamide
  • the solvent (B) is N-methyl-2-pyrrolidone
  • the polymer (C) is a water-soluble polymer
  • the solvent (D) is water.
  • the polymer (A) is an acryl polymer
  • the solvent (B) is dimethyl sulfoxide
  • the polymer (C) is a water-soluble polymer
  • the solvent (D) is water.
  • Examples of the combination of the polymers and solvents preferably include combinations shown in the following Table 1.
  • the formed article of this invention can be also produced by a process (second embodiment) for the production of a formed article having a plurality of cells formed in a polymer, each cell including an active substance, the process comprising coagulating a dope in a coagulating liquid,
  • the active substance being hydrophilic when the polymer (A) in the dope is a hydrophobic polymer or the active substance being hydrophobic when the polymer (A) in the dope is a hydrophilic polymer.
  • the polymer (A), the solvent (B) and the solvent (D) are the same as those in the first embodiment.
  • the second embodiment does not use the polymer (C).
  • the second embodiment is characterized in that the active substance is hydrophilic when the polymer (A) is hydrophobic and that the active substance is hydrophobic when the polymer (A) is hydrophilic.
  • the polymer (A) and the active substance have the one-against-the-other repelling natures due to a combination of hydrophilic and hydrophobic natures, so that a “bell” structure is constituted.
  • the active substance is hydrophilic.
  • a hydrophobic polymer poly-m-phenyleneterephthalamide is employed.
  • silica gel is employed.
  • the active substance is hydrophobic.
  • a hydrophilic polymer polyvinyl alcohol is employed.
  • activated carbon is employed.
  • the dope preferably contains, per 100 parts by mass of the polymer (A), 100 to 10,000 parts by mass, more preferably 1,000 to 5,000 parts by mass of the solvent (E).
  • the content of the active substance per 100 parts by mass of the polymer is preferably 100 to 10,000 parts by mass, more preferably 100 to 1,900 parts by mass.
  • the coagulating liquid is the same as those described with regard to the first embodiment.
  • the polymer (A) is poly-m-phenyleneterephthalamide
  • the solvent (B) is N-methyl-2-pyrrolidone
  • the solvent (D) is water.
  • the polymer (A) is an acryl polymer
  • the solvent (B) is dimethyl suboxide
  • the solvent (D) is water.
  • the active substance is at least one member selected from the group consisting of metal oxides, metals, inorganic substances, minerals, synthetic resins and organisms. Examples of the combination of the polymers and solvents preferably include combinations shown in the following Table 2.
  • PMPTA poly-m-phenyleneterephthalamide
  • NMP N-methyl-2-pyrrolidone
  • an anionic surfactant (Emal 0 (Production Name), supplied by Kao Corporation) was added to 100 parts by weight of water, and the mixture was stirred until the surfactant was fully dissolved, to prepare a coagulating liquid.
  • the dope was charged into a microsyringe with a 1 ml needle and dropwise added into the coagulating liquid to obtain spheres of a formed article.
  • FIGS. 1 and 2 show electron microscope photographs of a structure obtained without adding the starch paste.
  • an anionic surfactant (Emal 0 (Trade Name), supplied by Kao Corporation) was added to 100 parts by weight of water, and the mixture was stirred until the surfactant was fully dissolved, to prepare a coagulating liquid.
  • the dope was charged into a microsyringe having no 1 ml needle and dropwise added into the coagulating liquid to obtain spheres of a formed article.
  • the yeast plant in some spheres of the article was immobilized in the following manner and then starch paste was dissolved in the following manner.
  • Some of the spheres of the formed article obtained by the forming were immersed in the immobilizing liquid were kept in the state at 4° C. for 2 hours.
  • the spherical formed articles were taken out of the immobilizing liquid, placed in water and warmed in a hot water bath at 60° C. for 1 hour to dissolve the starch paste. Further, the spheres of the formed article were immersed in the immobilizing liquid and maintained at 4° C. for 2 days to give the formed article having a structure shown in FIGS. 5 to 7 .
  • an anionic surfactant (Emal 0 (Product name), supplied by Kao Corporation) was added to 100 parts by mass of water, and the mixture was stirred until the surfactant was fully dissolved, to prepare a coagulating liquid.
  • the dope was charged into a microsyringe having no 1 ml needle and dropwise added into the coagulating liquid to obtain spheres of a formed article.
  • FIGS. 11 to 13 show electron microscope photographs of a structure produced without adding any starch paste.
  • an anionic surfactant (Emal 0 (Product Name), supplied by Kao Corporation) was added to 100 parts by mass of water, and the mixture was stirred until the surfactant was fully dissolved, to prepare a coagulating liquid.
  • the dope was discharged into the coagulating liquid with an apparatus shown in FIG. 14 , and the resulting product was taken up with a roller to give a fibrous formed article.
  • FIG. 15 shows a scanning electron microscope photograph of the thus-obtained fibrous formed article.
  • the fibrous shaped article obtained in Example 4 was packed in a transparent column, having an internal diameter of 30 mm and a length of 100 mm.
  • the fiber packing amount was 13 g, and this weight included 8.6 g of the activated carbon.
  • Table 3 shows the results of comparisons of concentrations of geosmin and 2-methylisoborneol in the raw water and the treated water. A water purification effect of the formed article of this invention was confirmed.
  • a transparent column having an internal diameter of 30 mm and a length 100 mm was packed with 8.6 g of particulate activated carbon (granular activated carbon, supplied by Wako-Purechemical Ind. Co., Ltd.) having a mass equivalent to that in Example 5.
  • particulate activated carbon granular activated carbon, supplied by Wako-Purechemical Ind. Co., Ltd.
  • the formed article of this invention ensures that an active substance included therein and a substance outside capsules can effectively come in contact with each other without suffering influences such as a pressure loss.
  • the formed article of this invention ensures that the surface area thereof can be utilized to the utmost without having the surface of an active substance coated with a polymer.
  • the formed article of this invention ensures that an active substance does not easily come off or separate even when external friction or the like is exerted.
  • the formed article of this invention ensures that an active substance does not directly come in contact with a human body or is not sucked into a human body.
  • the formed article of this invention which includes an active substance therein, is expected to be applied to various fields such as environmental cleanups including atmosphere and water treatment and the production of chemical products. For example, when an adsorbent to adsorb VOC or the like is supported inside, adsorption treatment can be efficiently carried out.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Medicinal Preparation (AREA)
  • Materials For Medical Uses (AREA)
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Applications Claiming Priority (5)

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JP2005-292644 2005-10-05
JP2005292644 2005-10-05
JP2006-230684 2006-08-28
JP2006230684 2006-08-28
PCT/JP2006/320242 WO2007043545A1 (fr) 2005-10-05 2006-10-04 Article moulé et procédé de production correspondant

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090136816A1 (en) * 2007-11-28 2009-05-28 Samsung Sdi Co., Ltd. Hollow capsule structure and method of preparing the same

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110119811A1 (en) * 2009-11-24 2011-05-26 Mmi-Ipco, Llc Insulated Composite Fabric
JP2008088351A (ja) * 2006-10-04 2008-04-17 Teijin Entech Co Ltd 成形体およびその製造方法
JP6205097B2 (ja) * 2015-07-04 2017-09-27 永嶋　良一 成形体の製造方法
JP6343269B2 (ja) * 2015-10-14 2018-06-13 永嶋　良一 凝集構造物の分解方法、および、それを工程として含む、一次粒子、または／および、一次粒子から構成される微細凝集物の製造方法
WO2017150729A1 (fr) * 2016-03-03 2017-09-08 合同会社ＩＰ Ｂｒｉｄｇｅ１号 Capsule poreuse et son procédé de production
US10624354B2 (en) * 2017-02-28 2020-04-21 Illinois Tool Works Inc. Mixing machine with VFD based diagnostics
JP6663948B2 (ja) * 2018-03-29 2020-03-13 永嶋　良一 凝集構造物の分解方法、および、それを工程として含む、一次粒子、または／および、一次粒子から構成される微細凝集物の製造方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4511711A (en) * 1982-02-10 1985-04-16 Sumitomo Chemical Company, Limited Process for producing semipermeable membrane
US4761232A (en) * 1986-03-07 1988-08-02 Porex Technologies Corp. Of Georgia Macroporous substrate containing microporous matrix
US4876287A (en) * 1984-08-20 1989-10-24 Bend Research, Inc. Selective ion-complexing media for the removal of metal-ion contaminants from plating baths
US6696258B1 (en) * 1998-01-20 2004-02-24 Drexel University Mesoporous materials and methods of making the same

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CS179075B1 (en) * 1974-11-26 1977-10-31 Stoy Vladimir Mode of manufacture of spherical particles from polymer
JPS58139703A (ja) * 1982-02-12 1983-08-19 Sumitomo Chem Co Ltd 半透膜の製造方法
US4915839A (en) * 1984-03-15 1990-04-10 Cuno, Incorporated Process for surface modifying a microporous membrane
JPH01245035A (ja) 1987-01-17 1989-09-29 Nobuyuki Tanaka ポリアミド連続多孔質膜
JPS6465143A (en) 1987-09-04 1989-03-10 Ube Industries Production of porous material
JPH02647A (ja) * 1987-11-27 1990-01-05 Nok Corp 多孔質膜の製造法
JP3417963B2 (ja) * 1992-11-19 2003-06-16 三井化学株式会社 高分子多孔質体の製造方法
WO1995005083A1 (fr) 1993-08-13 1995-02-23 Smith & Nephew Richards Inc Mousses polymeres microporeuses et surfaces microtexturees
JP2002080629A (ja) 2000-06-14 2002-03-19 Ube Ind Ltd ポリアミド多孔質球状粒子およびその製造方法
JP2002069222A (ja) * 2000-08-31 2002-03-08 Daicel Chem Ind Ltd 発泡体、およびその製造方法
JP4605937B2 (ja) * 2001-05-23 2011-01-05 旭化成せんい株式会社 ポリケトン多孔体
JP2003088747A (ja) 2001-09-19 2003-03-25 Yasuo Hatate 中空かつ多孔性外殻を有するマイクロカプセルおよびその製造法ならびに活性物質を封入する方法
JP4210477B2 (ja) 2002-06-27 2009-01-21 トッパン・フォームズ株式会社 多孔性マイクロカプセルの製造方法
JP2004115764A (ja) 2002-09-30 2004-04-15 Teijin Ltd メタフェニレンイソフタルアミド系ポリマー多孔膜の製造方法
JP2004123973A (ja) * 2002-10-04 2004-04-22 Kanegafuchi Chem Ind Co Ltd スチレン系樹脂発泡体およびその製造方法
KR100647581B1 (ko) * 2003-07-02 2006-11-24 삼성에스디아이 주식회사 나노입자로 구성된 미세 다공성 박막 및 그의 제조방법
CN1253493C (zh) * 2003-07-30 2006-04-26 复旦大学 一种中等孔隙率的高分子多孔泡沫的注塑制备方法
US20070141265A1 (en) * 2004-02-02 2007-06-21 Timothy Thomson Process for controlling the density, conformation and composition of the hydrophilic layer of a polyurethane composite
JP2006257371A (ja) * 2005-03-18 2006-09-28 Teijin Engineering Ltd マクロボイド部を有する成形体およびその製造方法
JP2006265468A (ja) * 2005-03-25 2006-10-05 Teijin Engineering Ltd 成形体の製造方法および成形体
JP2006335917A (ja) * 2005-06-03 2006-12-14 Toyota Motor Corp 成形体、防音材料及びその製造方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4511711A (en) * 1982-02-10 1985-04-16 Sumitomo Chemical Company, Limited Process for producing semipermeable membrane
US4876287A (en) * 1984-08-20 1989-10-24 Bend Research, Inc. Selective ion-complexing media for the removal of metal-ion contaminants from plating baths
US4761232A (en) * 1986-03-07 1988-08-02 Porex Technologies Corp. Of Georgia Macroporous substrate containing microporous matrix
US6696258B1 (en) * 1998-01-20 2004-02-24 Drexel University Mesoporous materials and methods of making the same

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Hawley's Condensed Chemical Dictionary. Defintion of "Pore." John Wiley and Sons. 14th Edition. 2002. *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090136816A1 (en) * 2007-11-28 2009-05-28 Samsung Sdi Co., Ltd. Hollow capsule structure and method of preparing the same

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