Preparation method of chitobiose derivative crosslinking fibers

A chitosan derivative, chitosan technology, applied in the direction of fiber chemical characteristics, textiles and papermaking, etc., can solve problems such as taking a long time, achieve the effect of easy operation, high mechanical strength, and expand the scope of application

Inactive Publication Date: 2015-11-25
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that it takes a long time to convert the polymer into a nanoporous foam

Method used

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  • Preparation method of chitobiose derivative crosslinking fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Dissolve 2g of chitosan (deacetylation degree DP=85%, weight average molecular weight Mw=3000) in dilute acetic acid solution, add glycidyl methacrylate, heat and stir for 12h, after the reaction is completed, after-treatment A relatively pure photopolymerizable chitosan derivative is obtained.

[0026] (2) Dissolve photopolymerizable chitosan derivatives and photoinitiator 2959 (2959 and photopolymerizable chitosan derivatives=0.1 / 1) in (1) in solvent water (photopolymerizable chitosan The mass ratio of derivatives to water = 1 / 100), frozen at 0°C to freeze and crystallize the water, and use a light intensity of 20mW / cm at 0°C 2 The ultraviolet light source was irradiated for 40 minutes to cross-link, and the solvent water was removed by freeze-drying to obtain a cross-linked chitosan derivative fiber material.

Embodiment 2

[0028] (1) Dissolve 2g of chitosan (deacetylation degree DP=85%, weight average molecular weight Mw=5000) in dilute acetic acid solution, add glycidyl methacrylate, heat and stir for 12h, after the reaction is completed, after-treatment A relatively pure photopolymerizable chitosan derivative is obtained.

[0029] (2) photopolymerizable chitosan derivatives and photoinitiator 8700 (mass ratio=0.001 / 1 of photoinitiator 8700 and photopolymerizable chitosan derivatives) in (1) are dissolved in solvent water (can be The mass ratio of photopolymerized chitosan derivatives to water = 1 / 1000), frozen at -197°C to freeze and crystallize the water, and use a light intensity of 30mW / cm at -197°C 2 The ultraviolet light source is irradiated for 30 minutes to cross-link, and the solvent water is removed by freeze-drying to obtain a cross-linked chitosan derivative fiber material.

Embodiment 3

[0031] (1) Dissolve 2g of chitosan (deacetylation degree DP=88%, weight average molecular weight Mw=8000) in dilute acetic acid solution, add glycidyl methacrylate, heat and stir for 12h, after the reaction is completed, after-treatment A relatively pure photopolymerizable chitosan derivative is obtained.

[0032] (2) photopolymerizable chitosan derivatives and water-soluble thioxanthone photoinitiators (water-soluble thioxanthone photoinitiators and photopolymerizable chitosan derivatives in (1) Mass ratio=0.005 / 1) be dissolved in the mixture of solvent water and acetic acid (mass ratio=5 / 10000 of the mixture of photopolymerizable chitosan derivative and water and acetic acid, the mass ratio of water and acetic acid is 100 / 1 ), frozen at -50°C to freeze and crystallize water and acetic acid, and use a light intensity of 50mW / cm at a low temperature of -20°C 2 The ultraviolet light source is irradiated for 20 minutes for crosslinking, and the solvent water and acetic acid are...

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Abstract

The invention discloses a preparation method of chitobiose derivative crosslinking fibers. The preparation method of the chitobiose derivative crosslinking fibers comprises the following steps of performing grafting modification on chitobiose through ring-opening reaction to obtain chitobiose derivative with polymerization reaction activity; adding photoinitiator to perform miscibility and then performing low-temperature freezing crystallization; performing irradiance crosslinking polymerization at low temperature; and removing a solvent by freeze drying to obtain a chitobiose derivative crosslinking fiber material. By the preparation method, the chitobiose derivative crosslinking fiber material with high mechanical property and mechanical strength is obtained. In a preparation process, a reagent for changing characteristics of chitobiose is not added, original excellent properties of the chitobiose serving as natural polymers are not changed, and the crosslinking chitobiose derivative fiber material can be widely used for various fields of medicine release systems, wound healing materials, sewage treatment, heavy metal recycling, membrane separation, daily-use chemical industry and the like.

Description

technical field [0001] The invention relates to the field of natural polyelectrolyte fiber materials, in particular to a method for preparing crosslinked fibers of chitosan derivatives through photopolymerization. Background technique [0002] Chitosan (chitosan), also known as deacetylated chitin, is obtained by deacetylation of chitin (chitin), which exists widely in nature, and its chemical name is polyglucosamine (1-4)-2-amino-B-D glucose. . Since the Frenchman Rouget first obtained chitosan in 1859, the excellent properties of this natural polymer, such as biofunctionality, compatibility, blood compatibility, safety, and microbial degradation, have attracted widespread attention from all walks of life. Significant progress has been made in applied research in many fields such as medicine, food, chemical industry, cosmetics, water treatment, metal extraction and recovery, biochemical and biomedical engineering. For patients, there have been research reports on the effe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/00C08B37/08C08F299/00C08F2/48C08J3/24
Inventor 王克敏朱奇凡陈佳杰殷杰伟
Owner CHANGZHOU UNIV
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