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Graphene oxide/chitosan grafted type double-network hydrogel and preparation method thereof

A technology of chitosan and hydrogel, which is applied to the preparation of the above-mentioned hydrogel, and the field of high-strength graphene oxide/chitosan grafted double network hydrogel, which can solve the problems of poor mechanical properties and achieve improvement Compatibility, Breakthrough Low Mechanical Properties, Effects of Tensile Strength and Compression Strength Improvement

Inactive Publication Date: 2014-11-12
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, both chitosan-type smart hydrogels and composite hydrogels with graphene oxide nanoparticles have a problem—poor mechanical properties, which limits their application in drug-controlled release systems, sensors, and biological cell scaffolds. and biological tissue engineering and other fields

Method used

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  • Graphene oxide/chitosan grafted type double-network hydrogel and preparation method thereof
  • Graphene oxide/chitosan grafted type double-network hydrogel and preparation method thereof
  • Graphene oxide/chitosan grafted type double-network hydrogel and preparation method thereof

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Embodiment 1

[0033] The graphene oxide / chitosan graft type double network hydrogel provided by the present embodiment, the hydrogel is a double network structure, wherein the first network is graphene oxide / chitosan grafted hydrogel, so The graphene oxide / chitosan grafted hydrogel is formed by grafting reaction of graphene oxide solution, chitosan solution, initiator, first monomer and crosslinking agent, and the second network is interspersed in the first network Inside, the second network is a hydrogel polymerized by the second monomer, cross-linking agent and photoinitiator under ultraviolet light irradiation.

[0034]The preparation method in the present embodiment is as follows: the natural flake graphite with particle diameter of 48 μm is used as raw material, and graphene oxide is obtained by the improved Hummers method, and the specific method is: add 140mL concentrated sulfuric acid and 15mL phosphoric acid to 1g of natural flake graphite, stir And add 7.2g potassium permanganate,...

Embodiment 2

[0040] The graphene oxide / chitosan graft type double network hydrogel provided by the present embodiment, the hydrogel is a double network structure, wherein the first network is graphene oxide / chitosan grafted hydrogel, so The graphene oxide / chitosan grafted hydrogel is formed by grafting reaction of graphene oxide solution, chitosan solution, initiator, first monomer and crosslinking agent, and the second network is interspersed in the first network Inside, the second network is a hydrogel polymerized by the second monomer, cross-linking agent and photoinitiator under ultraviolet light irradiation.

[0041] The preparation method in the present embodiment is as follows: the natural flake graphite with particle diameter of 48 μm is used as raw material, and graphene oxide is obtained by the improved Hummers method, and the specific method is: add 120mL concentrated sulfuric acid and 17mL phosphoric acid to 1g of natural flake graphite, stir And add 4.5g potassium permanganate...

Embodiment 3

[0047] The graphene oxide / chitosan graft type double network hydrogel provided by the present embodiment, the hydrogel is a double network structure, wherein the first network is graphene oxide / chitosan grafted hydrogel, so The graphene oxide / chitosan grafted hydrogel is formed by grafting reaction of graphene oxide solution, chitosan solution, initiator, first monomer and crosslinking agent, and the second network is interspersed in the first network Inside, the second network is a hydrogel polymerized by the second monomer, cross-linking agent and photoinitiator under ultraviolet light irradiation.

[0048] The preparation method in the present embodiment is as follows: be that the natural flake graphite of 75 μm is raw material with particle diameter, obtain graphene oxide by the improved Hummers method, concrete method is: add 180mL concentrated sulfuric acid and 24mL phosphoric acid in 1.5g natural flake graphite, Stir and add 9g of potassium permanganate, control the rea...

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Abstract

The invention provides graphene oxide / chitosan grafted type double-network hydrogel. The graphene oxide / chitosan grafted type double-network hydrogel is of a double-network structure, wherein the first network is graphene oxide / chitosan grafted hydrogel which is formed by a graphene oxide solution, a chitosan solution, an initiator, a first monomer and a cross-linking agent through grafting reaction, the second network is inserted in the first network in a penetrating mode, and the second network is hydrogel which is formed by a second monomer, a cross-linking agent and a photo-initiator through polymerization under ultraviolet irradiation. The graphene oxide / chitosan grafted type double-network hydrogel has high compression strength and tensile strength. Due to the fact that the chitosan is introduced, biocompatibility of the hydrogel is improved, and then the double-network hydrogel can be better applied to the fields of biological medicine, construction industry, chemical industry, mining industry and the like. The invention further provides a preparation method for preparing the graphene oxide / chitosan grafted type double-network hydrogel. The method is simple in process, and industrialization can be easily achieved.

Description

technical field [0001] The invention provides a high-strength graphene oxide / chitosan grafted double-network hydrogel, which belongs to the field of hydrogel technology, and also provides a preparation method of the hydrogel. Background technique [0002] Polymer hydrogel is a kind of moderately cross-linked polymer network system that contains rich hydrophilic groups and can absorb water and swell in aqueous solution without dissolving in water. According to the response to external stimuli, hydrogels can be divided into traditional hydrogels and smart hydrogels. The so-called smart hydrogel is a polymer with a three-dimensional cross-linked network structure that can respond significantly to small changes or stimuli in the external environment (such as temperature, pH value, electricity, light, magnetic field, specific biomolecules, etc.). Because it can respond to external stimuli and has intelligence, it has application potential in fields such as agriculture, chemical ...

Claims

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Application Information

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IPC IPC(8): C08L51/02C08L33/26C08K9/02C08K9/00C08K3/04
Inventor 曾鸣刘建新李然然许清强
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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