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Preparing method of biomimetic laminated high-strength composite hydrogel film

A composite hydrogel, high-strength technology, applied in the field of polymer hydrogel, can solve problems such as poor mechanical strength, achieve high tensile modulus, simple preparation method, and high elongation

Active Publication Date: 2012-07-25
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the shortcomings of poor mechanical strength of traditional polymer hydrogels, and provide a bionic layered high-strength composite hydrogel film

Method used

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  • Preparing method of biomimetic laminated high-strength composite hydrogel film
  • Preparing method of biomimetic laminated high-strength composite hydrogel film
  • Preparing method of biomimetic laminated high-strength composite hydrogel film

Examples

Experimental program
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Effect test

Embodiment 1

[0032] (1) Dissolving synthetic hectorite nanosheets with a diameter of 10-60 nanometers in water, ultrasonication for 30 minutes, and stirring for 5 hours to obtain a uniform synthetic hectorite aqueous solution, and then adding N-isopropylpropylene Amide monomer, stirred for 30 minutes to dissolve N-isopropylacrylamide, then added initiator 2,2-diethoxyacetophenone, stirred for 1 hour to dissolve the initiator, and finally obtained synthetic hectorite, N- Aqueous solution of isopropylacrylamide and initiator. Wherein the mass percentage of N-isopropylacrylamide is 2.67%, the mass percentage of synthetic hectorite is 0.6%, and the mass percentage of 2,2-diethoxyacetophenone is 0.27% , and the balance is water.

[0033](2) Pour the mixed solution obtained in step (1) onto a microporous filter membrane with a pore size of 0.1 micron and vacuum filter to obtain N-isopropylacrylamide, synthetic hectorite, 2,2-diethoxy A filter cake of acetophenone and water. Then irradiate the...

Embodiment 2

[0036] (1) Dissolving synthetic hectorite nanosheets with a diameter of 10-60 nanometers in water, ultrasonicating for 30 minutes, and stirring for 5 hours to obtain a uniform synthetic hectorite aqueous solution, then adding acrylamide monomer, stirring Dissolve the acrylamide in 30 minutes, then add the initiator 2,2-diethoxyacetophenone, stir for 1 hour to dissolve the initiator, and finally obtain an aqueous solution containing synthetic hectorite, acrylamide and the initiator. Wherein the mass percentage of acrylamide is 2.67%, the mass percentage of synthetic hectorite is 0.6%, the mass percentage of 2,2-diethoxyacetophenone is 0.1%, and the balance is water .

[0037] (2) Pour the mixed solution obtained in step (1) onto a filter membrane with a pore size of 0.05 micron for vacuum filtration to obtain a compound containing acrylamide, synthetic hectorite, 2,2-diethoxyacetophenone and water filter cake. The water content in the filter cake is further reduced by slow vo...

Embodiment 3

[0040] (1) Dissolving natural montmorillonite nanosheets with a diameter of 50-200 nanometers in water, ultrasonication for 30 minutes, and stirring for 24 hours to obtain a uniform natural montmorillonite aqueous solution, and then adding N,N-dimethylpropylene Amide monomer, stir for 30 minutes to dissolve N,N-dimethylacrylamide, then add the initiator 2-hydroxy-4'-(2-hydroxyethoxy)-2-methylpropiophenone, stir for 30 minutes to dissolve and initiate agent, and finally obtain an aqueous solution containing natural montmorillonite, N, N-dimethylacrylamide, and an initiator. Wherein the mass percent composition of N,N-dimethylacrylamide monomer is 8%, the mass percent composition of natural montmorillonite is 0.6%, 2-hydroxyl-4'-(2-hydroxyethoxy)- The mass percent composition of 2-methylpropiophenone is 0.5%, and the balance is water.

[0041] (2) Pour the mixed solution obtained in step (1) onto a microporous filter membrane with a pore size of 0.22 microns for vacuum filtrati...

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Abstract

The invention discloses a preparing method of a biomimetic laminated high-strength composite hydrogel film. The method comprises the following steps of: mixing a polymer monomer with an inorganic nano-sheet to obtain mixed solution, filtering the mixed solution and carrying out photo-initiation in-situ polymerization to obtain the biomimetic laminated high-strength composite hydrogel film. The biomimetic laminated high-strength composite hydrogel film is formed by compounding the polymer and the organic nano-sheet, and the hydrogel film internally has a laminated micron and nano structure, and has the tensile strength being larger than 0.6 MPa, the tensile modulus being larger than 1.0 MPa and the tensile strain being larger than 700% after being soaked in water.

Description

technical field [0001] The invention belongs to the field of polymer hydrogels, in particular to a preparation method of a bionic layered high-strength composite hydrogel film. Background technique [0002] Polymer hydrogel is composed of a three-dimensional polymer cross-linked network and a large amount of water, wherein water fills the voids of the three-dimensional polymer cross-linked network. Polymer hydrogels are soft and wet materials that are both solid (fixed shape) and liquid (water in the interstices of the network can move freely). Chemically cross-linked polymer hydrogels have been widely used in scientific research and practical applications, such as soft contact lenses, superabsorbent polymer materials, separation membranes, tissue repair, pharmaceuticals, etc., and have achieved considerable economic benefits. [0003] However, common chemically crosslinked hydrogels have low strength and modulus and are brittle, and their poor mechanical properties limit t...

Claims

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Application Information

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IPC IPC(8): C08L33/26C08L33/24C08L39/04C08L33/02C08L33/14C08K3/34C08K3/04C08J5/18C08F120/54C08F120/56C08F220/54C08F220/06C08F126/06C08F120/28C08F2/48
Inventor 程群峰江雷王建锋
Owner BEIHANG UNIV
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