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A kind of preparation method of chitosan physical hydrogel with high strength

A chitosan, high-strength technology, applied in the field of functional polymer materials, can solve the problems of poor biocompatibility and poor degradability, and achieve the effects of low cost, simple preparation process and good degradation performance.

Active Publication Date: 2018-11-06
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of poor biocompatibility and poor degradability in preparing chitosan hydrogels by traditional methods, and provide a method for preparing chitosan physical hydrogels with high strength

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 0.5 g of chitosan was dissolved in 99.5 g of a 2% aqueous solution of glacial acetic acid, and stirred at 30° C. for 0.5 hour. Weigh 0.3 g of silver nitrate, add it into the chitosan solution, and stir at 30° C. for 1 hour. The stirred mixed solution and the mixed solution with the same mass concentration of 26% ammonia solution were respectively placed in a sealed bag and reacted in the dark for 3 hours to obtain chitosan physical hydrogel.

Embodiment 2

[0019] Dissolving 2 grams of chitosan in 98 grams of an aqueous solution of glacial acetic acid with a mass concentration of 4%, stirred at 60° C. for 2 hours. Weigh 5 grams of graphene oxide, add it into the chitosan solution, and stir at 60° C. for 2 hours. The stirred mixed solution and the mixed solution with the same mass concentration of 28% ammonia solution were respectively placed in a sealed bag and reacted in the dark for 3 hours to obtain chitosan physical hydrogel.

Embodiment 3

[0021] 8 grams of chitosan was dissolved in 92 mass concentration of 2% glacial acetic acid aqueous solution, stirred at 70° C. for 1 hour. 6 grams of carbon nanotubes were weighed, added to the chitosan solution, and stirred at 70° C. for 1 hour. The stirred mixed solution and the mixed solution with the same mass concentration of 18% ammonia solution were respectively placed in a sealed bag and reacted in the dark for 8 hours to obtain chitosan physical hydrogel.

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Abstract

The invention relates to a preparation method of high-strength chitosan physical hydrogel, belonging to the field of functional high polymer materials. The preparation method comprises the following steps: firstly dissolving chitosan into a glacial acetic acid water solution, and stirring at 20-80 DEG C for 0.5-3 hours; adding functional auxiliary components, and stirring at 20-80 DEG C to react for 0.5-3 hours; and finally, respectively placing the reaction solution and volatile alkaline liquid, commonly placing the reaction solution and the volatile alkaline liquid in a closed environment, and reacting 0.5-10 hours at a sealed light-shading place, so as to obtain a target product. The preparation method has the beneficial effects that a chitosan solution does not need to be compounded with other high polymer materials, and the high-strength hydrogel material can be obtained by adding small-molecule components and simultaneously has good degradation property of the chitosan and good functionality of the auxiliary components. Besides, the preparation process is simple, the cost is low, and the preparation method is suitable for being popularized and used.

Description

technical field [0001] The invention relates to a preparation method of a high-strength chitosan physical hydrogel, belonging to the field of functional polymer materials. Background technique [0002] Chitosan is a natural polymer material extracted from the shells of crustaceans such as shrimps and crabs. It is the only alkaline polysaccharide in nature. Chitosan has been widely used in food, medicine, medical equipment and other fields because of its good biocompatibility, biodegradability, hemostatic performance, antibacterial performance and other biological properties. [0003] Using 6-OH, 2-NH on the chitosan molecular chain 2 The cross-linking reaction of chitosan can obtain a hydrogel material with a network structure, which is widely used because it can retain the good biological properties of chitosan and has good hydrophilic and water-retaining properties. However, the current process of preparing hydrogels from chitosan mainly uses chemical cross-linking agent...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/075C08L5/08
CPCC08J3/075C08J2305/08
Inventor 陈煜李鹏赵健闫晓婷屈潇赛
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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