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A kind of chitosan-cellulose composite material and dressing thereof

A composite material and cellulose technology, which is applied in medical science, absorbent pads, bandages, etc., can solve the problems of high rigidity, limited application, and brittleness of materials, and achieve high elasticity, avoid slow degradation, and good thermal stability.

Active Publication Date: 2021-07-27
HANGZHOU INST OF ADVANCED MATERIAL BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the existence of a large number of hydrogen bonds in the cellulose structure and the repeating units of the six-membered ring structure, the defects of high rigidity and brittleness limit its wide application.

Method used

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  • A kind of chitosan-cellulose composite material and dressing thereof
  • A kind of chitosan-cellulose composite material and dressing thereof
  • A kind of chitosan-cellulose composite material and dressing thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Step 1), 1 part of double-ended hydrogen-containing siloxane (n=2) was dissolved in 50 parts of tetrahydrofuran, 1.0 parts of acrylic acid, 1 wt % of polymerization inhibitor BHT, 10 -5 10 parts of chloroplatinic acid, dissolved in 10 parts of tetrahydrofuran and added to the constant pressure dropping funnel, the dropping speed was controlled, stirred, and reacted at 60°C for 5 hours, the solvent was distilled off under reduced pressure, and 30 parts of toluene, excess sodium bicarbonate and 10 parts of Deionized water, stirred at 60°C for 3 hours, separated to remove the water phase, took the organic layer, and distilled off the solvent under reduced pressure to obtain siloxane acrylic acid, denoted as A;

[0046] The dosage of polymerization inhibitor BHT is 1wt% of the mass of acrylic acid.

[0047]Step 2), 1.0 parts of A are added to the mixed solution of 0.1wt% 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride and N-hydroxysuccinimide, Activate the carb...

specific Embodiment 2-8

[0052] Specific embodiment 2-8, other are with specific embodiment 1, difference is following table:

[0053]

[0054]

[0055] The chitosan-cellulose composite material obtained in specific example 1 was used as the base material of the application example, and it was processed into a chitosan-cellulose composite material dressing.

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Abstract

A chitosan-cellulose composite material provided by the invention and a preparation method thereof, the method uses double-terminal hydrogen-containing siloxane, acrylic acid, chitosan, cellulose, etc. as raw materials, respectively undergoes hydrosilylation, The multi-step reaction of chitosan amidation and cellulose double bond modification was completed. Through molecular structure design, polymer structure adjustment and polymerization process optimization, a new type of cellulose-based polymer was synthesized and freeze-dried , High temperature treatment, the cellulose composite material is obtained. The composite material not only effectively solves the current application defect of cellulose brittleness, but also has antibacterial and antibacterial effects, which can greatly broaden its application field.

Description

technical field [0001] The invention relates to a chitosan-cellulose composite material and a preparation method thereof. Background technique [0002] Cellulose is the most abundant and renewable natural organic polymer in nature, and its sources are very wide, including plants, marine organisms and microorganisms. The chemical structure of cellulose is a macromolecule composed of glucose-based units linked by β-1,4-glycosidic bonds. There are hydroxyl groups on C2, C3, and C6 of each glucose unit. Hydrogen bonds may be formed between them, so the cellulose molecules may form a crystalline structure. In nature, cotton is a substance with extremely high cellulose content, and the main component of plant fiber cell walls is also cellulose. Cellulose is also an important chemical raw material, and has wide application value in the fields of textiles, clothing, medicine and health, building materials and coatings. [0003] In recent years, there have been many studies on the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G81/00A61L15/26A61L15/46
CPCA61L15/26A61L15/46A61L2300/232A61L2300/404C08G81/00C08L87/00
Inventor 马贵平王良玉陈广凯聂俊陈斌凌
Owner HANGZHOU INST OF ADVANCED MATERIAL BEIJING UNIV OF CHEM TECH