CN107670708A - The AIDS diagnosis micro flow control chip device that operating mode is coupled based on dual drive - Google Patents

Abstract

The present invention relates to a kind of AIDS diagnosis micro flow control chip device that operating mode is coupled based on dual drive, belong to analysis testing field.The substrate of AIDS diagnosis micro-fluidic chip is made with dimethyl silicone polymer i.e. PDMS cheap and easily process, serial problem be present；This case is directed to the serial problem.This case main points are, the selected PDMS with ecosystem surface of substrate, and its neighbor positions fixes installing miniature ultrasonic transducer units in the sample liquid stream terminal of the micro-fluidic chip, interfacial tension is reduced with ultrasonic wave, strong absorbability using PDMS to ultrasonic wave simultaneously, reach ultrasonic intensity rapid decrement in short distance, so as to form interfacial tension difference at the both ends of the chip, the difference provides a kind of strength driven sample liquid stream and flowed along hydrophobic capillary channel to the terminal direction, the strength with Micropump its mechanicalness pumping strength included in structure while intercouple, this case solves the serial problem thereby totally.

Description

The AIDS diagnosis micro flow control chip device that operating mode is coupled based on dual drive

Technical field

The present invention relates to a kind of AIDS diagnosis micro flow control chip device that operating mode is coupled based on dual drive, belong to Analyze testing field.

Background technology

The micro-fluidic AIDS diagnosis technical background of associated multi-channel, it is special to may refer to the grade inventions of CN 200910151219.0 Sharp application case.

Only for the microflow control technique overall general picture of itself, famous micro-fluidic expert Mr. Lin Ping Cheng may refer to not The monograph " diagram Microfluid based Lab on a chip " gone out before long, the monograph is published via Science Press, and the monograph is to micro-fluidic Past of technology, now, and, vision of the future etc. etc., suffer from detail, be deep into long discussion of detail.

So, the Important Problems of this case that to have a talk below concern.

The basic framework of micro-fluidic chip, including be etched with the substrate of small fluid course and fit together therewith Cover plate, the small fluid course on the substrate, before upper cover plate is assembled, it is apparent on see to be exactly some micro-channels, to wait until After covering cover plate thereon, just really closure forms the small fluid course, the conduit inner surface of the micro-channel together with The part cover plate that surround the micro-channel forms described small fluid course together；So, it is clear that after assembling completes The small fluid course, the major part of its inner surface area is the inner surface area of that micro-channel, in other words, should The state or property of micro-channel inner surface substantially determine the integrality or property of the small fluid course；Therefore say, this The inner surface state or inner surface property of micro-channel of the individual structure on substrate are key factors；In principle, it is any can The material of its solid forms is kept or kept substantially, can be used to make substrate and cover plate, such as, it can act as substrate and lid The material of piece can be monocrystalline silicon piece, quartz plate, sheet glass, high polymer for example dimethyl silicone polymer, polymethyl methacrylate, Makrolon etc.；Certainly, the selection of substrate and the selection of cover plate be able to can also be differed with identical；From material consumption, make From the point of view of difficulty and application popularization prospect etc. etc., not small difference, the especially choosing of that substrate between these materials be present Material, have a great influence.

In various substrate making materials, dimethyl silicone polymer, i.e. PDMS, comparatively very easily shaping, at this It is extremely simple that micro-channel is made on the substrate of sample, and the lower cost for material, base is made with the polydimethyl siloxane material Piece, micro-channel, and the cover plate phase made with the cheap material such as glass or polypropylene or other plastic sheets are being suppressed or etched thereon Coordinate, be a kind of more satisfactory selection seemingly；Certainly, patch material can also select to use cheap dimethyl silicone polymer Material：So, this substrate selection is the scheme of polydimethyl siloxane material, and material is extremely cheap, and making is extremely simple, seems It should be extremely easy to popularize, promote.

But thing is really not so simple.

First, this polydimethyl siloxane material, that is, the material that alphabetical PDMS is referred to of abridging, itself are a kind of strong Strong hydrophobic material, micro-channel is built on this material, if without being operated for the modified of the micro-channel surface, that , after overall assembling is completed, that is, after covering cover plate, because the micro-channel its inner surface in structure occupies most liquid The inner surface of circulation road, then, its strong hydrophobic property of the PDMS micro-channels inner surface, is deciding factor, it can cause Similar to the aqueous solution the fine liquid stream of polar liquid by becoming very difficult, its flow resistance is big, or even in general is micro- Pump is all difficult to promote, certainly, if cover plate also selects to use the PDMS material, then, problem is substantially identical, similar； Therefore, among prior art, modification is modified particular for the micro-channel inner surface on the PDMS material, is necessary behaviour Make；So, this is pretty troublesome for the modified operation of PDMS micro-channel inner surfacesThat falls nor this problem, is formed tight Weight technology puzzlement, be another problem：PDMS polymer molecules inside its body phase of this PDMS material substrate have automatic The characteristic diffuse to the surface, migrated, the spy that this substrate body phase inside PDMS polymer molecules are diffused to the surface, migrated automatically Property, the state after modification by its inner surface of that micro-channel of surface modifying and decorating will be caused can not to maintain long enough Time, the holding time for micro-channel its inner surface state after that is surface-modified be substantially only sufficient to complete laboratory internal The time of test experiments needs；In other words, by surface modification or the PDMS micro-channel inner surfaces of surface modification, it is modified The surface state that is formed can not be lasting afterwards or after saying modification, but soon automatically tends to or say and become surface modification again Surface state before, the strong hydrophobic surface state of that script is returned in the shorter time, then, just think, this The micro-fluidic chip of sample can largely make, mass storage, be widely popularized, and answer is it is obvious that is, impossible.This Micro-channel on PDMS material, if not doing surface modification, similar to the aqueous solution the fine liquid stream of polar solvent can not pump it is logical Cross, chip also cannot just use；And if having done surface modification, its state after modifying can not be persistently kept again, or together Sample can not popularization and application.

So, how to accomplish that substrate can either be made using cheap PDMS material, and the microflute can be released Road inner surface decorating state can not persistently, chip can not largely make, largely lay in and then be widely popularized and such a make ability The puzzlement that the numerous professionals in domain are entangled with for a long time, the highly difficult problem that exactly one its obvious technology barrier can not despise.

Be present many year in the highly difficult problem, so far, not yet properly settled.

Second, the PDMS material of non-surface modification, it is stated that, its surface is strongly hydrophobic above, this strong hydrophobic Material surface and also have another problem, that is, this strong hydrophobic PDMS surfaces can adsorb large biological molecule, and And these adsorbed large biological molecules can also further depression further on PDMS surfaces, gradually fall into it is gradually deep, until It is heavy to be trapped within the body phase of PDMS substrates, in fact, this process, partly it is also due to PDMS material body phase interior polymer Molecule, which has, to be diffused to the surface, caused by travel motion；Such case, it can also be explained from another angle, i.e. continue not Disconnectedly from inside PDMS body phases to those polymer molecules of its diffusion into the surface, migration, its result moved, be little by little by that It has been involved in a bit by the large biological molecule of adsorption within the body phase of PDMS substrates, briefly, these adsorbed biologies Macromolecular is exactly to be swallowed up by PDMS substrate body phases；So, this PDMS substrates body phase swallows up the phenomenon of large biological molecule, its institute Caused by influence, necessarily cause the severe deviations of all kinds of test data of experiment for being related to large biological molecule.

As described above, the problem of PDMS substrates, is, its not only adsorption large biological molecule, and swallow up biological big point Son, so, as the large biological molecule of experiment test object, its disappearance will not stop because surface saturation is adsorbed, and It is, it is constantly adsorbed, also constantly swallowed up.

On PDMS substrates, its body phase is constantly swallowed up and tests showing for associated biomolecule macromolecular in related experiment test process As, it is to say that another kind, which is explained, substantial amounts of Minute pores in PDMS body phases be present, associated biomolecule macromolecular by after adsorption, Depression enters these Minute pores, and then is swallowed up；However, inventor thinks, those can allow the sky of miniature scale Qi leel squeezes into the Minute pores therebetween, not equal to saying that they also can directly allow the large biological molecule of relative large scale to enter Enter, both difference on yardstick are huge, must not make sweeping generalizations.Explanation is bypassed, in any case, as dependence test analysis object Large biological molecule is adsorbed by PDMS substrate micro-channels inner surface, and then is constantly swallowed up by PDMS substrate body phases, and this is person in charge of reception at ceremonies Phenomenon existing for sight.

, can be from containment PDMS surfaces pair in order to prevent swallow up effect of this PDMS substrate bodies relative to large biological molecule The absorption of large biological molecule addresses, and method is chemically modified modification aiming at the PDMS material surface, for For PDMS is the situation of substrate material, modification exactly is chemically modified to the surface of described micro-channel part, by changing The micro-channel inner surface of modification is learned, its absorption to large biological molecule can be contained, and then avoid large biological molecule Swallowed up by PDMS substrate body phases；But or that old problem, that is, the chemical modification on PDMS material surface is modified Surface state afterwards can not persistently be kept, the polymer molecule inside the PDMS substrate body phases its diffuse to the surface, move automatically The process of shifting, it soon can become that micro-channel inner surface state being modified by surface chemical modification again script strong and dredge Water and the state of strong adsorption large biological molecule, in other words, no matter how professionals in the field turn from side to side, the PDMS bases Its micro-channel inner surface of piece is always rapidly to strong hydrophobic surface state evolution.

So, how can either obtain that PDMS material price is extremely cheap, substrate makes extremely easy benefit, and can is enough Reach and contain the absorption process of the PDMS substrate micro-channel inner surfaces to large biological molecule for a long time, and then prevent PDMS substrate body phases The effect of swallowing up to large biological molecule so that related chip manufactured goods be able to maintain that one it is prolonged enough, reasonably guarantee the quality Phase, it is exactly a very intractable problem.The problem equally makes this area numerous as another problem addressed above Professional is entangled with, perplexed for a long time, and the problem is equally the highly difficult problem that its obvious technology barrier can not despise. Also be present many year in the problem, so far, also not yet properly settled.

Third, as described above, the PDMS micro-channel inner surfaces are strongly hydrophobic, and targetedly surface chemical modification or surface Chemical modification is difficult to persistently again, therefore, actually can only still belong to effective in the surface state after the modification of its surface or surface modification It is short-term within use it；If having had been subjected to that ofer short duration period of validity, and still by force if use, due to table Again close to hydrophobic state, bigger flowing is then already certainly existed using usual Micropump driving sample liquid stream for surface state Resistance, so, just by increasing Micropump pump power and pumping pressure test liquid can only be forced to flow to target direction flowing, as above Described, this PDMS material is soft, pumps sample liquid stream with too high, mechanical pumping pressure, will cause the substrate Bubbling, expanded, distortion, deformation, also, this high pressure feelings occur for the micro-channel that its sample introduction end includes sample introduction end near zone Under condition, the stripping between substrate and cover plate also easily occurs in the sample introduction end and its micro-channel of near zone and its periphery, Under this situation, the crack for the appearance that sample solution will enter after the stripping between the substrate and cover plate formed and it is horizontal everywhere Stream, this actually results in the damage of the micro-fluidic chip；It is certainly, not in place if surface modification or surface modification script, It can cause said circumstances occur within the of short duration usual term of validity；The feelings of liquid stream driving are being carried out using additional Micropump merely Under condition, the above-mentioned problem exists all the time.As described above, if any surface modification or surface modification etc. were not done completely Pre action, then, the above-mentioned problem will be even more serious, is roused even without micro-channel described in sample introduction end and its near zone occurs The problems such as being peeled off between bubble, expanded, distortion, deformation and substrate and cover plate, merely because the flow resistance is excessive, using high pressure Micropump also may not can drive sample liquid stream to be marched forward towards terminal side.

The content of the invention

The technical problem to be solved by the invention is to provide a package solution, while solve to address above Three aspects a series of problem actually mutually involved together, also, the solution is applied to AIDS Multichannel micro-fluidic chip field is used in diagnosis, forms a kind of new AIDS diagnosis multichannel micro-fluidic chip device.

The present invention solves the technical problem by following scheme, and the device that the program provides is that a kind of AIDS diagnosis is used Based on the micro flow control chip device of dual drive coupling operating mode, the structure of the device includes multichannel micro-fluidic chip, and this is micro- The structure of fluidic chip includes being bonded to each other the substrate and cover plate of installing together, and the substrate and cover plate are plate object or piece The channel structure via mould pressing process or etching technics formation is contained in shape thing, that face towards the cover plate of the substrate, mutually The substrate being jointly mounted to together has been built into the micro-fluidic chip containing pipeline configuration, the knot of the pipeline jointly with the cover plate Structure position is located at the juncture area that the substrate and the cover plate are bonded to each other, and the both ends of the pipeline are entered with the micro-fluidic chip respectively Sample end and terminal connection, the sample introduction end is the injection end of the micro-fluidic chip sample solution, and the terminal is the micro-fluidic chip The terminal that sample solution flows in its chip during actual sample introduction test, the terminal are located remotely from each other with the sample introduction end, and the terminal is with being somebody's turn to do Between 3 centimetres and 10 centimetres, the terminal links together with terminal liquid pool at the distance between sample introduction end, the terminal liquid pool its The profile of structure is in pond shape, pit shape or cup-shaped, and the terminal liquid pool is used to receive the sample for flowing to terminal via the pipeline molten Liquid, working electrode is sequentially equiped with diverse location in the pipeline and to electrode and reference electrode, the working electrode It is made up of conductive electrode and the gold size sensitive membrane for having embedded AIDS specific antigen being attached on the conductive electrode, The construction of the pipeline is in parallel construction, and the pipeline in parallel construction is made up of four lateral parallel connections, the work electricity The quantity of pole is four, and the installation position of four working electrodes is located in four laterals respectively, and, this four Specific antigen in its top layer gold size sensitivity membrane structure of working electrode is can be specifically bound to aids antibody four respectively Kind of AIDS antigenic substance, four kinds of antigenic substances are AIDS specific antigen p24, gp41, gp120 and gp36 respectively, institute It is gold material or thermal decomposition conducting polymer material to state working electrode its material, its pattern of the working electrode present sheet or Thread, emphasis is that its material of the substrate is dimethyl silicone polymer material, and its surface of the substrate is the surface of primary form, should The surface of primary form its be intended to refer to not by the material of any surface chemical modification or any surface chemical modification Primary form surface, the structure of the device also includes miniature ultrasonic transducer units, and, higher-order of oscillation electric signal transmission electricity Cable, one end and the miniature ultrasonic transducer units of the higher-order of oscillation electric signal transmission cable link together, the miniature ultrasonic Transducer is installed in the position of the cover plate of the micro-fluidic chip or the neighbouring terminal of substrate with attaching；The miniature ultrasonic changes Can device its major function be in the actual sample introduction test of micro-fluidic chip, the ultrasonic wave launched using it reduces sample solution Interfacial tension between the inwall of its inner passage of micro-fluidic chip, can be compatible, also, utilizes the sample introduction end And the distance between the terminal and the miniature ultrasonic transducer units installation position difference and its ultrasonic wave experienced Difference between difference in intensity, its interfacial tension of sample introduction end described in induced synthesis and the terminal its interfacial tension, this is micro- Interfacial tension difference between the fluidic chip both ends can form pressure gap between the both ends of the micro-fluidic chip, the pressure Power difference can drive sample solution to the end flow；Its function of the miniature ultrasonic transducer units also includes what is launched with it Ultrasonic wave checks in sample contained large biological molecule its absorption on the micro-fluidic chip its inner passage inner surface, enters And check swallow up effect of its body phase of the substrate of the dimethyl silicone polymer material to the large biological molecule；Softness simultaneously has elasticity Its function of the substrate of the dimethyl silicone polymer material is included with its property to the strong absorption of ultrasonic wave, ultrasonic wave is carried out strong Strong absorption, and thereby realize that ultrasonic wave is strong within micro-fluidic chip terminal to the limited short distance between the sample introduction end The rapid decrement of degree；And Micropump, the Micropump are connected with the sample introduction end；The function of the Micropump is, micro- with this in the sample solution Before interfacial tension between the inwall of its inner passage of fluidic chip is reduced by the ul-trasonic irradiation, alternate compatibility is increased Under the conditions of carrying, the interfacial tension difference come with the mechanicalness of Micropump pumping strength between the both ends of ultrasonic wave induction Its caused driving force is supported mutually, adjusts mutually, is mutually coupled, and one driving examination is pooled in a manner of Collaboration Sample liquid flows to the strength of the terminal direction flowing, and some high hydroscopic resin particles, the terminal liquid are filled with the terminal liquid pool Its opening end of pond is covered by breathable microporous film.

The word of Micropump one art-recognized meanings of itself are known for the professional in micro-fluidic chip field.

The Micropump both can be the Micropump of external form；The Micropump can also do into or say the embedded micro-fluidic chip The Micropump of the built in version of its internal sample introduction end structure position or the sample introduction end Near-neighbor Structure position.

For example miniature piezoelectric pump of the Micropump, miniature peristaltic pump or miniature air driven pump.

The gold size sensitive membrane is to be sufficiently mixed chitosan gold size solution and AIDS specific antigen solution uniformly, is used Point sample instrument point sample is coated on specified structure position, and forms its drying and forming-film.AIDS in the gold size sensitive membrane is special Specific Antigen is the AIDS antigen of horseradish peroxidase or glucose oxidase mark, and the gold size sensitive membrane has been wrapped Containing complementary medium therein is introduced for the above-mentioned each AIDS specific antigen of fixation, the complementary medium such as shell gathers Sugar, cellulose acetate, gelatin be therein a kind of or their mixture.

The pipeline in the microfluidic chip structure includes the lateral, and its internal diameter size may each be any Selected size, still, for using prepare liquid sample less as far as possible and reducing the consideration of reagent loss etc., the pipeline includes The lateral preferably selects the passage of capillary level, and the passage of the capillary level is implied that on its internal diameter and ordinary meaning Capillary the suitable passage of internal diameter.The shape of cross section of its inner passage of capillary can be arbitrary shape, institute State for example circular shape of cross section, oval, square, rectangle, bar shaped, naturally it is also possible to it is the linear of bending arbitrarily be present, Also, the interior shape of the capillary, with the extension of pipeline, the shape of cross section of different parts can also allow to be different Shape.Only for the word of capillary one, its art-recognized meanings is known.

What is be related in structure is the electrode of microsize to electrode and reference electrode, and its electrode shape, which may each be, appoints The selected shape of meaning, the arbitrarily selected shape such as square piece shape, rectangular patch, strip or round sheet etc..It is described Art-recognized meanings to electrode and the reference electrode vocabulary of itself are known.

Only for professional of the word of ultrasonic transducer one art-recognized meanings of itself for ultrasonic technology field, It is known.

Various sizes, variously-shaped ultrasonic transducer are commercially available；Its size of commercially available miniature ultrasonic transducer units It may diminish to the magnitude only calculated with millimeter.

Only with regard to miniature ultrasonic transducer units its technique for fixing on general industry application solid body surface its It is known general technology for the professional in ultrasonic technology field for body.This case is not to this expansion superfluous words.

Only with regard to naked PDMS substrates itself micro-channel molding or lithographic technique for, be open-and-shut known skill Art.

The industrial products market of involved its all size of higher-order of oscillation electric signal transmission cable is on sale.

The structure of the micro fluidic device can also include higher-order of oscillation electric signal generator；The higher-order of oscillation electric signal passes Its other end of transmission cable can be connected with the higher-order of oscillation electric signal generator.

The involved higher-order of oscillation electric signal generator technology of itself, come for the professional in ultrasonic technology field Say, be simple and known；The higher-order of oscillation electric signal generator can customize to ultrasonic instrument specialized factory.

The preferred scope of its specified ultrasonic wave transmission power of the miniature ultrasonic transducer units is between 2 milliwatts and 2000 milliwatts Between；The preferred scope of the frequency of its ultrasonic wave operationally launched of the miniature ultrasonic transducer units be between 100KHz with Between 12MHz.

Only for the word of high hydroscopic resin one art-recognized meanings of itself, come for the professional of chemical field Say, be known.

The high hydroscopic resin is commercially available.

Only for the word of breathable microporous film one art-recognized meanings of itself, for the professional of technical field of membrane, It is known.

The breathable microporous film is commercially available.

This case device can further include some annexes certainly, and the annex is such as multiple tracks electrochemical workstation Deng the art-recognized meanings of the multiple tracks electrochemical workstation are known.The each work being related in this case microfluidic chip structure Electrode and to electrode and reference electrode etc., special it can get lines crossed and the multiple tracks electrochemical workstation via corresponding respectively The corresponding interface coupled.It is described that special to get lines crossed be for by each phase of each electrode and the multiple tracks electrochemical workstation Answer the private cable that interface is coupled to each other.The micro-fluidic chip in this case device, its structure can also include micro-valve, The quantity of the micro-valve is unlimited, and according to being actually needed, the micro-valve can be installed in any need in the microfluidic chip structure Position to be mounted；The word of micro-valve one is for the professional of micro fluidic chip technical field, the art-recognized meanings of itself It is known；The micro-valve itself manufacturing technology and the use of technology is also known；The component that the micro-valve is not required.

The diameter of the working electrode can allow to be that any setting is easily installed the suitable diameter used, still, It is recommending or say preferable its scope of the diameter between 0.1 micron to 2000 microns；The length of the working electrode can To allow to be that any setting is easily installed the length used, it is however recommended to or to say the preferable length its scope be 1 Micron is between 15000 microns.

It is installed in by spraying or point sample instrument point sample or the coating of other appropriate process described in the working electrode surface layer Gold size sensitive membrane, its thicknesses of layers can allow be any setting treat sample measuring liquid occur electrical signals response thickness, It is however recommended to thickness preferable thickness is between 10 nanometers and 200 nanometers in other words.

The cover plate in chip structure, its material can allow to be any electrical insulating property material, such as：Polypropylene, Glass, polymethyl methacrylate, dimethyl silicone polymer, etc., in order to make smaller size of micro-fluidic chip, for example do Into the micro-fluidic chip of only 2.0 centimetres to 3.0 centimetres of super-small of length, and realized in the extremely short distance to ultrasonic wave Extremely fast decay, can preferably dimethyl silicone polymer be used as cover plate.Certainly, selected on large-sized micro-fluidic chip Using dimethyl silicone polymer it is used as the cover plate, and this case technical scheme is allowed.

Described its thickness of cover plate and substrate can allow be any setting the thickness for being easy to assembling, the thickness of recommendation or say Preferable thickness is between 1.0 millimeters and 5.0 millimeters.Less thickness is advantageous to save material.

The application method of this case micro-fluidic chip：

This case drives liquid stream in the capillary channel of the four-way micro-fluidic chip with dual drive coupling operating mode Middle flowing, four kinds of aids antibodies are detected respectively using four-way electrochemical analytical instrument.

Corresponding four kinds of aids antibodies are detected with four kinds of AIDS antigens, with detecting phase with four kinds of aids antibodies The four kinds of AIDS antigens answered, similarly, can diagnosis of aids；The principle of its foundation is, must in AIDS patient It is so antigen, antibody and deposits, and mutual Reversible binding, form reversible conjugate, therefore, antibody and thereby is detected with antigen Diagnosis of aids, with being gone to detect antigen and diagnosis of aids with antibody, diagnostic purpose can be reached.Certainly, different means Its corresponding electrode sensitive decorative layer technically and differs.

The specific detection of this case micro-fluidic chip is as follows using step：

1st, blood serum sample liquid is added in micro-pipe road, under dual drive coupling operating mode driving, various AIDS The AIDS for the corresponding horseradish peroxidase-labeled that antibody molecule is embedded by gold size sensitive membrane on electrode surface in each passage Specific antigen captures.

2nd, the AIDS specific antigen of horseradish peroxidase-labeled is formed with the aids antibody in blood serum sample and exempted from Epidemic disease compound.

3rd, using multi-channel electrochemical analyzer, the electron mediators such as catechol are added, it is above-mentioned using amperometric detection Curent change caused by reaction, it is derived from the species and content of various analytes.

4th, result is subjected to comprehensive analysis, comprehensive diagnos is carried out to aids antibody.

It is an advantage of the invention that its close position installs miniature ultrasonic with attaching in the terminal of the micro-fluidic chip Wave transducer, it is launched using the miniature ultrasonic transducer units low-power, the ultrasonic wave of high-frequency band so that without table Compatibility between strong hydrophobic its tube wall of micro-fluidic chip internal pipeline and the test object aqueous solution of face chemical modification It is significantly increased, this is sample liquid stream by providing a realistic possibility；Meanwhile using dimethyl silicone polymer substrate its To the strong absorbability of ultrasonic wave, in shorter distance, it is, from the terminal to the sample introduction end only In the very short distance of several centimeters of yardsticks, reach the rapid decrement of ultrasonic intensity, thereby described the two of the micro-fluidic chip The difference of the interfacial tension is caused at end, and the difference of the interfacial tension between the both ends can cause a kind of driving force, this kind because Its function of driving force is to drive sample liquid stream in originally strongly hydrophobic capillary channel caused by interfacial tension difference Flowed to the terminal direction；It is micro-fluidic with this in the sample solution and the simultaneous Micropump in structure, its function are Interfacial tension between the inwall of its inner passage of chip is reduced, the increased premise bar of alternate compatibility by the ul-trasonic irradiation Under part, its institute of interfacial tension difference for being come with the mechanicalness of Micropump pumping strength between the both ends of ultrasonic wave induction The driving force brought is supported mutually, adjusts mutually, is mutually coupled, and one driving test liquid is pooled in a manner of Collaboration Flow to the strength of the terminal direction flowing；The presence of the Micropump so that the miniature ultrasonic transducer units its ultrasonic wave transmitting is strong Degree can be allowed to appropriate reduction, and this is particularly suitable for for the situation containing ultrasonic wave sensitive composition in detection object；And due to The presence of the ultrasonic transducer and its radiated ultrasonic wave, it is possible to increase alternate compatibility, reduce interfacial tension, and provide and be somebody's turn to do Both ends interfacial tension difference special driving force caused by it, then, in this case, sample liquid stream its in the micro-channel Interior flow resistance is greatly reduced, and correspondingly, its running resistance of the Micropump is greatly reduced, and so, the Micropump just can be to compare Low pumping pressure carries out the pumping work for the sample solution, because mechanical pumping pressure is greatly reduced, because This, in such a situation, be just not susceptible to caused by sample introduction terminal tool pumping pressure is excessive the sample introduction end and its The problems such as stripping between the micro-channel bubbling of near zone, expansion, deformation, distortion and the region substrate and cover plate etc.； This case dual drive couples the scheme of running and added for the handling of sample fluid flow action, can allow for making With the multiple indexs of ultrasonic intensity, ultrasonic frequency, Micropump pump power, Micropump pumping pressure etc. come the stream for the flowing Dynamic speed, flowing action include flow forward or pause flowing or acceleration flowing etc. flowing action carry out multi-parameter and accurately grasped Control；By this case dual drive coupling operation scheme, entirely without must be to its micro-channel of the substrate of the dimethyl silicone polymer material Etc. relevant surfaces carry out any surface chemical modification or surface chemical modification, altogether dispensed with the surface chemical modification or table The laborious procedures of face chemical modification；On the other hand, the ultrasonic wave of the low-power, high-frequency band, additionally it is possible to contain the life in sample Absorption of the thing macromolecular on literalness naked its inner surface of pipeline of dimethyl silicone polymer substrate, so contain this poly- two Swallow up effect of its body phase of methylsiloxane substrate to the large biological molecule；The antigen, antibody and antigen and antibody Reversible binding thing is all the type for belonging to described large biological molecule certainly；Due to described suction-operated and described swallow up Effect is effectively contained that therefore, dependence test result will be better able to objectively reflect actual conditions；The low-power, high frequency The effect of frequency range ultrasonic wave, also include facilitating what the Reversible binding between antigen, antibody react quickly to reach certainly, this causes phase Closing test operation can be with than the completion of faster speed.

As described above, the presence of the Micropump so that its ultrasonic wave emissive porwer of the miniature ultrasonic transducer units can be permitted Perhaps appropriateness reduces, then, the feature helps to protect its sensitive coating of the working electrode, is allowed to from ultrasound injury.

Based on this case scheme, completely without carrying out coming to the surface for its relevant surfaces of dimethyl silicone polymer substrate Modification or surface chemical modification operation are learned, therefore, this surface chemical modification layer or surface chemical modification layer not need In the presence of, then, its body phase interior polymer molecule of the dimethyl silicone polymer substrate constantly diffuses to the surface, migrates its institute automatically It is caused that the damaging influence of the surface chemical modification layer or surface chemical modification layer is also just not present.

It is related that the technical scheme of this case has dissolved its application to dimethyl silicone polymer substrate addressed above totally A series of technical barriers.Based on this case scheme, this kind be very cheap and the easily dimethyl silicone polymer material of processing and fabricating Material be just possible in the micro-fluidic chip its prepare, production, using etc. field play bigger effect.

Brief description of the drawings

Fig. 1 is its rough outside side view of this case device.

In figure, 1 is the substrate of dimethyl silicone polymer material, and 2 be cover plate, and 3 be higher-order of oscillation electric signal transmission cable, 4 It is miniature ultrasonic transducer units, 5 be the sample introduction end of the micro-fluidic chip, and 6 be the terminal of the micro-fluidic chip, and 7 are Micropump, 8 be infusion tube；Arrow in legend indicate the micro-fluidic chip its in actual motion, it is poor by pressure at two ends Driving, the flow direction of its sample liquid stream.

Embodiment

In this case that Fig. 1 is shown embodiment, the structure of the device includes multichannel micro-fluidic chip, and this is micro-fluidic The structure of chip includes being bonded to each other the substrate 1 and cover plate 2 of installing together, and the substrate 1 and cover plate 2 are plate object or piece The channel structure via mould pressing process or etching technics formation, phase are contained in shape thing, that face towards the cover plate 2 of the substrate 1 The substrate 1 being mutually jointly mounted to together has been built into the micro-fluidic chip containing pipeline configuration jointly with the cover plate 2, the pipeline Locations of structures be located at the juncture area that the substrate 1 and the cover plate 2 are bonded to each other, the both ends of the pipeline respectively with the micro-fluidic core The sample introduction end 5 of piece and terminal 6 connect, and the sample introduction end 5 is the injection end of the micro-fluidic chip sample solution, and the terminal 6 is this The terminal that sample solution flows in its chip when the actual sample introduction of micro-fluidic chip is tested, the terminal 6 and the sample introduction end 5 are mutually remote From between 3 centimetres and 10 centimetres, the terminal 6 contacts with terminal liquid pool for the distance between the terminal 6 and the sample introduction end 5 Together, the profile of its structure of the terminal liquid pool is in pond shape, pit shape or cup-shaped, and the terminal liquid pool is used to receive via the pipeline stream The sample solution of terminal 6 is moved, is sequentially equiped with working electrode on diverse location in the pipeline and to electrode and reference Electrode, the working electrode is by conductive electrode and is attached on the conductive electrode and has embedded AIDS specific antigen Gold size sensitive membrane form, the construction of the pipeline is in parallel construction, the pipeline in parallel construction by four laterals simultaneously Connection is formed, and the quantity of the working electrode is four, and the installation position of four working electrodes is located at four branches respectively In pipeline, and, the specific antigen in its top layer gold size sensitivity membrane structure of four working electrodes is that AIDS is resisted respectively Physical efficiency specific binding four kinds of AIDS antigenic substances, four kinds of antigenic substances be respectively AIDS specific antigen p24, Gp41, gp120 and gp36, its material of the working electrode are gold material or thermally decompose conducting polymer material, the work Sheet or thread is presented in electrode its pattern, and emphasis is, its material of the substrate 1 is dimethyl silicone polymer material, its table of the substrate 1 Face is the surface of primary form, the surface of the primary form its be intended to refer to and do not pass through any surface chemical modification or any The surface of the primary form of the material of surface chemical modification, the structure of the device also include miniature ultrasonic transducer units 4, with And higher-order of oscillation electric signal transmission cable 3, one end of the higher-order of oscillation electric signal transmission cable 3 and the miniature ultrasonic transducing Device 4 links together, the miniature ultrasonic transducer units 4 attach be installed in the micro-fluidic chip cover plate 2 or substrate 1 it is neighbouring The position of the terminal 6；Its major function of the miniature ultrasonic transducer units 4 is the profit in micro-fluidic chip actual sample introduction test The ultrasonic wave launched with it reduces the interfacial tension between sample solution and the inwall of its inner passage of micro-fluidic chip, Can be compatible, also, using the sample introduction end 5 and the terminal 6 and the installation position of miniature ultrasonic transducer units 4 it Between distance difference and the difference on its ultrasonic intensity experienced, its interfacial tension of sample introduction end 5 described in induced synthesis With the difference between described its interfacial tension of terminal 6, the interfacial tension difference between the micro-fluidic chip both ends 5,6 can be at this Pressure gap is formed between the both ends 5,6 of micro-fluidic chip, the pressure gap can drive sample solution to the direction of terminal 6 Flowing；Its function of miniature ultrasonic transducer units 4 also ultrasonic wave including being launched with it checks biology contained in sample Its absorption on the micro-fluidic chip its inner passage inner surface of macromolecular, and then check the dimethyl silicone polymer material Swallow up effect of its body phase of substrate 1 to the large biological molecule；The substrate 1 of the dimethyl silicone polymer material that is soft and having elasticity Its function includes, with its property to the strong absorption of ultrasonic wave, absorbing ultrasonic wave strongly, and thereby in the micro-fluidic core The piece terminal 6 is to the rapid decrement that ultrasonic intensity is realized within the limited short distance between the sample introduction end 5；And Micropump 7, the Micropump 7 is connected with the sample introduction end 5；The function of the Micropump 7 is, in the sample solution and its inner passage of the micro-fluidic chip Inwall between interfacial tension reduced, under the increased precondition of alternate compatibility by the ul-trasonic irradiation, with the Micropump 7 The interfacial tension difference come between the both ends 5,6 of ultrasonic wave induction of mechanicalness pumping strength drive caused by it Strength is supported mutually, adjusts mutually, is mutually coupled, and one driving test liquid is pooled in a manner of Collaboration and flows to the end The strength for holding 6 directions to flow, some high hydroscopic resin particles are filled with the terminal liquid pool, its opening end of the terminal liquid pool is saturating Gas microporous barrier is covered.

Arrow in legend indicate the micro-fluidic chip its in actual motion, by both ends 5,6 pressure differentials drive, its The flow direction of sample liquid stream.

Fig. 1 is depicted without the associate members such as the higher-order of oscillation electric signal generator.

Involved miniature ultrasonic transducer units 4 are commercially available；It can also be customized to ultrasonic transducer producer.

Involved higher-order of oscillation electric signal transmission cable 3 is commercially available；It can also be customized to ultrasonic transducer producer.

Involved higher-order of oscillation electric signal generator market has the product close to needs commercially available；It can also determine to relevant manufacturers System.

Micropump 7 involved by legend can customize to specialized factory.

Its inner passage of the micro-fluidic chip involved by this case is the pipeline of hydrophobic capillary form.

The Micropump both can be the Micropump of external form；The Micropump can also do into or say the embedded micro-fluidic chip The Micropump of the built in version of its internal sample introduction end structure position or the sample introduction end Near-neighbor Structure position.Micropump in legend is external The Micropump of form；The Micropump can certainly do into or say sample introduction end or its neighbour knot inside the embedded microfluidic chip structure The Micropump of the built in version of structure position, its basic structure key element are identical with the Micropump of external form.

Each working electrode in this example structure and can be respectively via each special electricity to electrode and reference electrode Cable or say is being got lines crossed respectively with the corresponding cable interface of the multiple tracks electrochemical workstation as annex or saying interface connection of getting lines crossed.

This case device is that a variety of corresponding aids antibodies are detected with a variety of AIDS antigens, thereby diagnoses AIDS Disease.

Claims (10)

1. the AIDS diagnosis micro flow control chip device that operating mode is coupled based on dual drive, the structure of the device includes leading to more Road micro-fluidic chip, the structure of the micro-fluidic chip include being bonded to each other the substrate and cover plate of installing together, the substrate and Cover plate is plate object or tablet, and that face towards the cover plate of the substrate is contained via mould pressing process or etching technics shape Into channel structure, be bonded to each other the substrate that is installed together and be built into the miniflow containing pipeline configuration jointly with the cover plate Chip is controlled, the locations of structures of the pipeline is located at the juncture area that the substrate is bonded to each other with the cover plate, the both ends difference of the pipeline It is connected with the sample introduction end of the micro-fluidic chip and terminal, the sample introduction end is the injection end of the micro-fluidic chip sample solution, should Terminal is the terminal of sample solution flowing in its chip when the actual sample introduction of the micro-fluidic chip is tested, the terminal and the sample introduction end phase Mutually remote, between 3 centimetres and 10 centimetres, the terminal contacts with terminal liquid pool for the distance between the terminal and the sample introduction end Together, the profile of its structure of the terminal liquid pool is in pond shape, pit shape or cup-shaped, and the terminal liquid pool is used to receive via the pipeline stream The sample solution of terminal is moved, is sequentially equiped with working electrode on diverse location in the pipeline and to electrode and reference electricity Pole, the working electrode is by conductive electrode and is attached on the conductive electrode and has embedded AIDS specific antigen Gold size sensitive membrane is formed, and the construction of the pipeline is in parallel construction, and the pipeline in parallel construction is by four lateral parallel connections Form, the quantity of the working electrode is four, and the installation position of four working electrodes is located at four branched pipes respectively In road, and, the specific antigen in its top layer gold size sensitivity membrane structure of four working electrodes is to aids antibody respectively Can specific binding four kinds of AIDS antigenic substances, four kinds of antigenic substances be respectively AIDS specific antigen p24, Gp41, gp120 and gp36, its material of the working electrode are gold material or thermally decompose conducting polymer material, the work Sheet or thread is presented in electrode its pattern, it is characterised in that its material of the substrate is dimethyl silicone polymer material, the substrate its Surface is the surface of primary form, the surface of the primary form its be intended to refer to not by any surface chemical modification or appoint The surface of the primary form of the material of what surface chemical modification, the structure of the device also include miniature ultrasonic transducer units, with And higher-order of oscillation electric signal transmission cable, one end and the miniature ultrasonic transducer units of the higher-order of oscillation electric signal transmission cable Link together, the miniature ultrasonic transducer units are installed in cover plate or the neighbouring end of substrate of the micro-fluidic chip with attaching The position at end；Its major function of the miniature ultrasonic transducer units is in the actual sample introduction test of micro-fluidic chip, is sent out using it The ultrasonic wave penetrated reduces the interfacial tension between sample solution and the inwall of its inner passage of micro-fluidic chip, can It is compatible, also, utilize the sample introduction end and the distance between the terminal and the miniature ultrasonic transducer units installation position difference Difference on different and its ultrasonic intensity for being experienced, its interfacial tension of sample introduction end described in induced synthesis and the terminal its Difference between interfacial tension, interfacial tension difference between the micro-fluidic chip both ends can the micro-fluidic chip this two Pressure gap is formed between end, the pressure gap can drive sample solution to the end flow；The miniature ultrasonic transducer units Its function also include the ultrasonic wave launched with it check large biological molecule contained in sample its micro-fluidic chip its Absorption on the inner surface of inner passage, and then check the substrate of the dimethyl silicone polymer material its body phase to the large biological molecule The effect of swallowing up；Softness simultaneously has its function of the substrate of the dimethyl silicone polymer material of elasticity including strong to ultrasonic wave with it The property of absorption, ultrasonic wave is absorbed strongly, and thereby in micro-fluidic chip terminal to having between the sample introduction end The rapid decrement of ultrasonic intensity is realized within the short distance of limit；And Micropump, the Micropump are connected with the sample introduction end；The Micropump Function be, the interfacial tension between the inwall of the sample solution and its inner passage of micro-fluidic chip by the ultrasonic wave make With and reduce, under the increased precondition of alternate compatibility, come with the mechanicalness of Micropump pumping strength and the ultrasonic wave induce The both ends between interfacial tension difference its caused driving force support mutually, adjust mutually, be mutually coupled, with association Mode with running pools one strength for driving test liquid to flow to the terminal direction flowing, is filled with the terminal liquid pool Some high hydroscopic resin particles, its opening end of the terminal liquid pool are covered by breathable microporous film.

2. the AIDS diagnosis according to claim 1 micro flow control chip device that operating mode is coupled based on dual drive, Characterized in that, it is capillary channel that the pipeline, which includes the lateral,.

3. the AIDS diagnosis according to claim 1 micro flow control chip device that operating mode is coupled based on dual drive, Characterized in that, the thermal decomposition conducting polymer is the conduction formed by polyimides or polyacrylonitrile after anoxybiotic is heat-treated Property material.

4. the AIDS diagnosis according to claim 1 micro flow control chip device that operating mode is coupled based on dual drive, Characterized in that, the width or diameter of the working electrode be between 0.1 micron to 2000 microns, and, the work electricity The length of pole is between 1 micron to 15000 microns.

5. the AIDS diagnosis according to claim 1 micro flow control chip device that operating mode is coupled based on dual drive, Characterized in that, the thickness of the gold size sensitive membrane is between 10 nanometers and 200 nanometers.

6. the AIDS diagnosis according to claim 1 micro flow control chip device that operating mode is coupled based on dual drive, Characterized in that, the cover plate its material in structure is dimethyl silicone polymer material.

7. the AIDS diagnosis according to claim 1 micro flow control chip device that operating mode is coupled based on dual drive, Characterized in that, the Micropump is miniature piezoelectric pump, miniature peristaltic pump or miniature air driven pump.

8. the AIDS diagnosis according to claim 1 micro flow control chip device that operating mode is coupled based on dual drive, Characterized in that, described its thickness of cover plate and substrate in structure is between 1.0 millimeters and 5.0 millimeters.

9. the AIDS diagnosis according to claim 1 micro flow control chip device that operating mode is coupled based on dual drive, Characterized in that, the structure of the micro fluidic device also includes higher-order of oscillation electric signal generator, the higher-order of oscillation electric signal passes Its other end of transmission cable is connected with the higher-order of oscillation electric signal generator.

10. the AIDS diagnosis according to claim 1 micro flow control chip device that operating mode is coupled based on dual drive, Characterized in that, its specified ultrasonic wave transmission power of the miniature ultrasonic transducer units, between 2 milliwatts and 2000 milliwatts, this is micro- The frequency of its ultrasonic wave operationally launched of type ultrasonic transducer is between 100KHz and 12MHz.