CN103205006B - Surface patterning high-strength and high-toughness hybrid hydrogel membrane and preparation method thereof - Google Patents

Surface patterning high-strength and high-toughness hybrid hydrogel membrane and preparation method thereof Download PDF

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CN103205006B
CN103205006B CN201310112802.7A CN201310112802A CN103205006B CN 103205006 B CN103205006 B CN 103205006B CN 201310112802 A CN201310112802 A CN 201310112802A CN 103205006 B CN103205006 B CN 103205006B
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tenacity
preparation
patterning
patterned surface
gel film
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CN103205006A (en
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赵孔银
冯灵智
阚伯红
崔文葵
吴寻霖
任倩
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Lexiang Guoyi (Beijing) Internet Hospital Co.,Ltd.
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Tianjin Polytechnic University
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Abstract

With the continuous development of tissue engineering, a surface patterning technology is concerned by people more and more and widely applied; and a micro-patterning technology is already used for accurately controlling the position and form of a cell and the co-culture of multiple cells, but a micro-pattern is more difficult to be directly constructed on the surface of hydrogel with good biocompatibility. The high-elasticity and high-toughness patterning hydrogel membrane is prepared on a patterning silicon slice base body by taking sodium alginate as a high-molecular framework, acrylamide and a derivative thereof as polymerization monomers, divinylbenzene, N,N'-methylene bisacrylamide or ethylene glycol dimethacrylate as chemical cross-linking agents and a metal salt water solution as an ionic cross-linking agent and adding inorganic nanoparticles as strengthening agents. The preparation method disclosed by the invention has the advantages of good controllability, simple process, low cost, good material biocompatibility, and the like; and the patterning hydrogel membrane disclosed by the invention is hopeful to be applied to the fields of stem cell culture, tissue regeneration, and the like.

Description

A kind of patterned surface high-intensity high-tenacity hybrid gel film and preparation method thereof
Technical field
The present invention relates to a kind of patterned surface high-intensity high-tenacity hybrid gel film and preparation method thereof, belong to functional materials and technical field of biological material.
Background technology
In recent years along with the development of organizational project and regenerative medicine, the problem of the aspects such as related materials surface modification and cell adhesion causes people more and more to pay close attention to.Tissue can be considered to be the complex body of cell and extracellular matrix, if the novel biomaterial of imitative extracellular matrix can be utilized to construct certain class biotic environment, and at its surface or inner cultivation cell, we just can utilize bionical means to study the important vital movement of internal body in vitro like this.Will construct the complex body of cell and biomaterial in vitro, just must understand many Fundamental Aspects of cell and biomaterial interaction aspect, wherein one of the problem of most critical is exactly the adherence mechanism of cell at biomaterial surface.In research cell adhesion mechanism, the patterned process of biomaterial surface makes originally complicated question simplification, and for more in depth studying the active mechanism such as cell adhesion, migration provides opportunity [Sun Jianguo, the golden micro-patterning modification of PEG-hydrogel and superficial cell thereof stick the research [D] of behavior. Fudan University, 2009].In addition, traditional cell research mode, such as on culture plate, study cell, be difficult to overcome the problems such as cell migration, micro-patterning technique that new development is got up then can realize cellular localization, contribute to studying cell contact etc. affect cell activities associated problem [Tang Jian, the preparation of micropatterned surface and cell contact affect the research [D] of differentiation of stem cells. Fudan University, 2010.].Therefore, along with the development of organizational project, surface patterning technique more and more receives the concern of people, is widely used.Oneself warp of micro-patterning technology is used for accurately controlling the position of cell and the co-cultivation of form (especially unicellular) and various kinds of cell, and oneself studies the interactional platform of cell-material on a cellular level through having built one for it.
High-molecular gel causes with good biocompatibility and pays close attention to widely.High-molecular gel is the multicomponent system by polymer three-dimensional network and solvent composition, to environmental stimulus as temperature, pH, electric field, solvent property, light intensity and optical wavelength, pressure, ionic strength, ion density and special chemical stimulation (as sugar) etc., produce the polymer network of great variety in shape in macroscopic view (volume).Macromole base component in the structure of hydrogel and body is close, is desirable cell culture vector.But the physical strength of most of artificial Common hydrogels is very poor, is easily out of shape, and along with water content difference occur swelling and deswelling.Such as gelatin is when water regain is 5 times of xerogel weight, and its fracture tensile strength is approximately 70KPa, and elongation at break is 10%.When absorbing water to 40 times, its fracture tensile strength only has its elongation at break of 6KPa to be 11%.The method improving hydrogel intensity traditionally mainly concentrates on to be improved on the cross-linking density of hydrogel, but the intensity of hydrogel fundamentally can not be improved only by raising cross-linking density, and greatly can reduce the snappiness of hydrogel, make hydrogel become very crisp.
The biomaterial preparing patterning modification has a lot of method, and the most frequently used has photoetching technique and the soft lithography based on this.Simple photoetching technique cost is high and purposes is limited, although and soft lithography has expanded the Application Areas of photoetching technique widely, if simply cover use; be faced with the stability problem of pattern in water.Existing patterning techniques is mostly for minority hydrophobic polymers such as hard matrix or silicon rubber, construct suitable micro-pattern in character close to the soft wet hydrogel surface of human body most tissues and then there is technical difficulty, because hydrogel poor toughness, easy distortion [Liu Peng, the Study on Preparation Technology [D] of material surface micron-nanometer heterozygosis pattern. Fudan University, 2009].Sun Jianguo etc. employ a kind of transfer techniques, and the Au patterning achieving its surface dexterously in PEG-hydrogel polymerization process is modified.[Sun Jianguo, Tang Jian, Ding Jiandong, based on surperficial micro-patterning technical study cell orientation [J]. Science Bulletin, 2009,5410:1344-1349.].N-isopropylacrylamide is modified the silicon substrate surface with different nanoscale grooves by this grade of primary track [18], have studied temperature-responsive [the Reversible Switchingbetween Superhydrophilicity and Superhydrophobicity.Surface Chemistry of modified surface, 2004,43:357-360].But aforesaid method step more complicated, cost is also high.Therefore, setting up of simple and practical hydrogel surface micro-patterning preparation method is significant.
The researchist of Harvard University have developed the hydrogel of snappiness and high tenacity, its composition is alginates and polyacrylamide [Highly stretchable and tough hydrogels, Nature, 2012,489 (7414): 133-136].The hydrogel elastic that these two kinds of materials are formed separately and toughness are all little, if but they are mixed by a certain percentage be polymerized in water, a kind of novel hydrogels can be obtained.Although about 90% is water in novel hydrogels, its elasticity is superpower, can be stretched to more than 20 times of original length and constantly, can also restore to the original state voluntarily afterwards.Its toughness is also fine, and one block of such hydrogel is broken disconnected, needs the energy that expends and to break disconnected one block of natural rubber similar.The hydrogel of such elasticity and toughness reaches the requirement of the tissues such as alternative cartilage, can be used for manufacturing associated medical devices, such as can manufacture artificial intervertebral disc with it.The report of micro-pattern is not also built at present in this kind of hydrogel surface.
The present invention take sodium alginate as macromolecular scaffold, with acrylamide and derivative thereof for polymerization single polymerization monomer, add chemical cross-linking agent, take aqueous metal salt as ion crosslinking agent, add inorganic nano-particle as toughener, the silicon chip matrix with patterning is prepared the patterning aquagel membrane of snappiness and high tenacity.This preparation method has the advantages such as controllability is good, technique is simple, cost is low, Biocompatibility is good, and this patterning aquagel membrane is expected to obtain application in fields such as stem cell cultivation, tissue regenerations.
Summary of the invention
For the deficiencies in the prior art, quasi-solution of the present invention is determined, and hydrogel is difficult to that patterned surface, hydrogel intensity and toughness are low, aquagel membrane thickness is difficult to control the problems such as even.
The technical scheme that the present invention solves that above-mentioned hydrogel is difficult to that patterned surface, hydrogel intensity and toughness are low, aquagel membrane thickness is difficult to control the problem such as even is a kind of patterned surface high-intensity high-tenacity hybrid gel film of design.
The invention provides a kind of patterned surface high-intensity high-tenacity hybrid gel film and preparation method thereof, it is characterized in that comprising the following steps:
A) successively have the silicon chip of patterning respectively by dilute hydrochloric acid, dehydrated alcohol and washed with de-ionized water, then 60-80 DEG C of vacuum-drying 8-24h, obtains dried patterning silicon chip;
B) 5-15g polymerization single polymerization monomer is taken, 0.5-2g sodium alginate, the linking agent of polymerization single polymerization monomer mass percent 0.03%-0.15%, be dissolved in 50-100ml deionized water together, stirring and dissolving is even, then the toughener of polymerization single polymerization monomer mass percent 1%-200% is added, the ammonium persulphate of polymerization single polymerization monomer mass percent 0.1%-5% is added again after ultrasonic disperse is even, the sodium bisulfite of polymerization single polymerization monomer mass percent 0.1%-5% and the Tetramethyl Ethylene Diamine of polymerization single polymerization monomer mass percent 0.01%-2%, after dispersed with stirring is even, immediately this solution is poured on patterning silicon chip that step a) processed, strike off with the knifing rod that thickness is 20-3000 μm, form the film of uniform thickness, vacuum defoamation, at N 2be polymerized 8-24h under protection, obtain the patterned surface gel-film of chemically crosslinked,
C) by step b) aqueous metal salt of the gel 0.01%-10% of chemically crosslinked that obtains soaks 0.5-24h, and wash away the salts solution on surface with deionized water, obtain patterned surface high-intensity high-tenacity hybrid gel film.
Polymerization single polymerization monomer of the present invention is any one or two or more mixture in diacetone-acryloamide(DAA), N-isopropylacrylamide, acrylamide, Methacrylamide, DMAA, 2-acrylamide-2-methyl propane sulfonic, and described aqueous metal salt is any one or two or more mixture in copper sulfate, zinc chloride, bariumchloride, iron(ic) chloride, aluminum chloride, calcium chloride, monocalcium phosphate, calcium sulfate, nitrocalcite, calglucon, secondary calcium phosphate, the calcium lactate aqueous solution.
Linking agent of the present invention is any one or two or more mixture in Vinylstyrene, vulcabond, N, N '-methylene-bisacrylamide, Ethylene glycol dimethacrylate, melamine methylol etherate.
Patterning silicon chip of the present invention is any one or two or more combinations of patterns in wavy line, narrow vertical bar line, wide vertical bar line, cylindrical shape and chequer.
Toughener of the present invention is any one or two or more mixture in nano silicon, nano titanium oxide, nanometer hydroxyapatite, nanoclay, carbon nanotube, Graphene, nano-calcium carbonate, nano zine oxide.
The preparation method of a kind of patterned surface high-intensity high-tenacity hybrid gel film of the present invention, it is characterized in that the printing effect relying on patterning silicon chip, pattern is printed off on the hybrid gel film surface of high-intensity high-tenacity, its preparation method and technique simple, cost is low, and this patterned surface high-intensity high-tenacity hybrid gel film has good application prospect in fields such as organizational project, stem cell cultivation and regenerative medicines.
Embodiment
Introduce specific embodiments of the invention below, but the present invention is not by the restriction of embodiment.
Embodiment 1. 1 kinds of surface narrow vertical bar line patterning high-intensity high-tenacity gel-films and preparation method thereof
A) successively have the silicon chip of narrow vertical bar line patterning respectively by dilute hydrochloric acid, dehydrated alcohol and washed with de-ionized water, then 60 DEG C of vacuum-drying 24h, obtain dried patterning silicon chip;
B) 15g N-isopropylacrylamide is taken, 0.5g sodium alginate, the Ethylene glycol dimethacrylate of N-isopropylacrylamide mass percent 0.03%, be dissolved in 100ml deionized water together, stirring and dissolving is even, then the toughener nanometer hydroxyapatite of N-isopropylacrylamide mass percent 1% is added, the ammonium persulphate of N-isopropylacrylamide mass percent 5% is added again after ultrasonic disperse is even, the sodium bisulfite of N-isopropylacrylamide mass percent 5% and the Tetramethyl Ethylene Diamine of N-isopropylacrylamide mass percent 0.01%, after dispersed with stirring is even, immediately this solution is poured on patterning silicon chip that step a) processed, strike off with the knifing rod that thickness is 20 μm, form the film of uniform thickness, vacuum defoamation, at N 2the lower free radical polymerization of protection, reaction 8h, obtains the surface narrow vertical bar line patterning gel-film of chemically crosslinked,
C) by step b) gel of chemically crosslinked that the obtains barium chloride solution of 0.01% soaks 24h, and wash away the salts solution on surface with deionized water, obtain surperficial narrow vertical bar line patterning high-intensity high-tenacity hybrid gel film.
Embodiment 2. 1 kinds of surface wide vertical bar line patterning high-intensity high-tenacity gel-films and preparation method thereof
A) successively have the silicon chip of wide vertical bar line patterning respectively by dilute hydrochloric acid, dehydrated alcohol and washed with de-ionized water, then 80 DEG C of vacuum-drying 8h, obtain dried wide vertical bar line patterning silicon chip;
B) 5g diacetone-acryloamide(DAA) is taken, 2g sodium alginate, the Vinylstyrene of diacetone-acryloamide(DAA) mass percent 0.15%, be dissolved in 50ml deionized water together, stirring and dissolving is even, then the toughener nano silicon of diacetone-acryloamide(DAA) mass percent 200% is added, the ammonium persulphate of diacetone-acryloamide(DAA) mass percent 5% is added again after ultrasonic disperse is even, the sodium bisulfite of diacetone-acryloamide(DAA) mass percent 5% and the Tetramethyl Ethylene Diamine of diacetone-acryloamide(DAA) mass percent 0.1%, after dispersed with stirring is even, immediately this solution is poured on patterning silicon chip that step a) processed, strike off with the knifing rod that thickness is 200 μm, form the film of uniform thickness, vacuum defoamation, at N 2the lower uv-light polymerization of protection, reaction 8h, obtains the surface wide vertical bar line patterning gel-film of chemically crosslinked,
C) by step b) gel of chemically crosslinked that the obtains solder(ing)acid of 10% soaks 0.5-24h, and wash away the salts solution on surface with deionized water, obtain surperficial wide vertical bar line patterning high-intensity high-tenacity hybrid gel film.
Embodiment 3. 1 kinds of surface cylindrical shape patterning high-intensity high-tenacity gel-films and preparation method thereof
A) successively have the silicon chip of cylindrical shape patterning respectively by dilute hydrochloric acid, dehydrated alcohol and washed with de-ionized water, then 80 DEG C of vacuum-drying 8h, obtain dried patterning silicon chip;
B) 15g acrylamide is taken, 0.5g sodium alginate, the Ethylene glycol dimethacrylate of acrylamide mass percent 0.03%, be dissolved in 100ml deionized water together, stirring and dissolving is even, then the toughener nano titanium oxide of acrylamide mass percent 1% is added, the ammonium persulphate of acrylamide mass percent 0.1% is added again after ultrasonic disperse is even, the sodium bisulfite of acrylamide mass percent 0.1% and the Tetramethyl Ethylene Diamine of acrylamide mass percent 0.01%, after dispersed with stirring is even, immediately this solution is poured on patterning silicon chip that step a) processed, strike off with the knifing rod that thickness is 20 μm, form the film of uniform thickness, vacuum defoamation, at N 2the lower high-power electron beam initiated polymerization of protection, reaction 24h, obtains the surface cylindrical shape patterning gel-film of chemically crosslinked,
C) by step b) gel of chemically crosslinked that the obtains calcium chloride water of 2% soaks 0.5h, and wash away the salts solution on surface with deionized water, obtain surface cylindrical shape patterning high-intensity high-tenacity hybrid gel film.
Embodiment 4. 1 kinds surperficial graticule patterning high-intensity high-tenacity gel-film and preparation method thereof
A) successively have the silicon chip of graticule patterning respectively by dilute hydrochloric acid, dehydrated alcohol and washed with de-ionized water, then 70 DEG C of vacuum-drying 12h, obtain dried chequer SiClx sheet;
B) 10g Methacrylamide is taken, 1.5g sodium alginate, the N of Methacrylamide mass percent 0.1%, N '-methylene-bisacrylamide, be dissolved in 50ml deionized water together, stirring and dissolving is even, then the toughener Graphene of Methacrylamide mass percent 50% is added, the ammonium persulphate of Methacrylamide mass percent 1% is added again after ultrasonic disperse is even, the sodium bisulfite of Methacrylamide mass percent 1% and the Tetramethyl Ethylene Diamine of Methacrylamide mass percent 0.02%, after dispersed with stirring is even, immediately this solution is poured on patterning silicon chip that step a) processed, strike off with the knifing rod that thickness is 400 μm, form the film of uniform thickness, vacuum defoamation, at N 2the lower gamma ray initiated polymerization of protection, reaction 24h, obtains the surperficial graticule patterning gel-film of chemically crosslinked,
C) by step b) gel of chemically crosslinked that the obtains copper sulfate solution of 5% soaks 8h, and wash away the salts solution on surface with deionized water, obtain surperficial graticule patterning high-intensity high-tenacity hybrid gel film.

Claims (9)

1. a preparation method for patterned surface high-intensity high-tenacity hybrid gel film, is characterized in that comprising the following steps:
A) successively have the silicon chip of patterning respectively by dilute hydrochloric acid, dehydrated alcohol and washed with de-ionized water, then 60-80 DEG C of vacuum-drying 8-24h, obtains dried patterning silicon chip;
B) 5-15g polymerization single polymerization monomer is taken, 0.5-2g sodium alginate, the linking agent of polymerization single polymerization monomer mass percent 0.03%-0.15%, be dissolved in 50-100ml deionized water together, stirring and dissolving is even, then the toughener of polymerization single polymerization monomer mass percent 1%-200% is added, the ammonium persulphate of polymerization single polymerization monomer mass percent 0.1%-5% is added again after ultrasonic disperse is even, the sodium bisulfite of polymerization single polymerization monomer mass percent 0.1%-5% and the Tetramethyl Ethylene Diamine of polymerization single polymerization monomer mass percent 0.01%-2%, after dispersed with stirring is even, immediately this solution is poured on patterning silicon chip that step a) processed, strike off with the knifing rod that thickness is 20-3000 μm, form the film of uniform thickness, vacuum defoamation, at N 2the lower initiated polymerization of protection, reaction 8-24h, obtains the patterned surface gel-film of chemically crosslinked,
C) by step b) aqueous metal salt of the gel-film 0.01%-10% of chemically crosslinked that obtains soaks 0.5-24h, and wash away the salts solution on surface with deionized water, obtain patterned surface high-intensity high-tenacity hybrid gel film.
2. the preparation method of a kind of patterned surface high-intensity high-tenacity hybrid gel film as claimed in claim 1, what it is characterized in that described polymerization single polymerization monomer is any one in diacetone-acryloamide(DAA), N-isopropylacrylamide, acrylamide, Methacrylamide, DMAA, 2-acrylamide-2-methyl propane sulfonic or two or more mixture.
3. the preparation method of a kind of patterned surface high-intensity high-tenacity hybrid gel film as claimed in claim 1, is characterized in that described aqueous metal salt is any one or two or more mixture in copper sulfate, zinc chloride, bariumchloride, iron(ic) chloride, aluminum chloride, calcium chloride, monocalcium phosphate, calcium sulfate, nitrocalcite, calglucon, secondary calcium phosphate, the calcium lactate aqueous solution.
4. the preparation method of a kind of patterned surface high-intensity high-tenacity hybrid gel film as claimed in claim 1, it is characterized in that described linking agent is any one or two or more mixture in Vinylstyrene, vulcabond, N, N '-methylene-bisacrylamide, Ethylene glycol dimethacrylate, melamine methylol etherate.
5. the preparation method of a kind of patterned surface high-intensity high-tenacity hybrid gel film as claimed in claim 1, is characterized in that described patterning silicon chip is any one or two or more combinations of patterns in wavy line, narrow vertical bar line, wide vertical bar line, cylindrical shape and chequer.
6. the preparation method of a kind of patterned surface high-intensity high-tenacity hybrid gel film as claimed in claim 1, is characterized in that described toughener is any one or two or more mixture in nano silicon, nano titanium oxide, nanometer hydroxyapatite, nanoclay, carbon nanotube, Graphene, nano-calcium carbonate, nano zine oxide.
7. the preparation method of a kind of patterned surface high-intensity high-tenacity hybrid gel film as claimed in claim 1, it is characterized in that its initiated polymerization mode be free radical cause, microwave radiation cause, UV-light cause, high-power electron beam cause, gamma ray cause, plasma cause in any one.
8. the preparation method of a kind of patterned surface high-intensity high-tenacity hybrid gel film as claimed in claim 1, is characterized in that the printing effect relying on patterning silicon chip, prints off pattern on the hybrid gel film surface of high-intensity high-tenacity.
9. the preparation method of a kind of patterned surface high-intensity high-tenacity hybrid gel film as claimed in claim 1, it is characterized in that preparation method's technique is simple, cost is low, and this patterned surface high-intensity high-tenacity hybrid gel film has good application prospect in organizational project, stem cell cultivation and regenerative medicine field.
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