Bactericidal chitin and its preparation and method for making cellulose solvent weaving liquid

A technology of chitosan and antibacterial agent, applied in the field of antibacterial chitosan and its preparation and preparation of cellulose solvent spinning solution, to achieve long-lasting antibacterial effect, good moisture retention and obvious antibacterial effect

Inactive Publication Date: 2003-11-19
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The solvent spinning method of the antibacterial chitosan (derivative) / cellulose fiber that the patent of the present invention relates to has not seen any report yet

Method used

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Embodiment 2

[0019] Adjust the 10% aqueous solution of chitosan quaternary ammonium derivatives to alkaline with 10% NaOH solution to separate out chitosan quaternary ammonium derivatives to obtain a 6% suspension, add 1 kg of DMAc solution to 1 kg of suspension , stirred, left to settle, removed the supernatant, then added 1 kg of DMAc solution, stirred, allowed to settle, removed the supernatant, and finally replaced the water in the suspension with 2 kg of LiCl / DMAc to obtain 6% O-chitosan derivative LiCl / DMAc suspension. 3 kg of this suspension is crushed with ultrasonic waves, so that the average particle size of the suspended particles is reduced to about 2 microns, and added to 100 kg of cellulose LiCl / DMAc solution under stirring to prepare a spinning solution, which is solidified in water The antibacterial cellulose fiber containing chitosan or chitosan derivatives in an amount of 1.5-3.0% is obtained by spinning in a bath. Embodiment two, O-methacryloyloxytrimethylammonium chlor...

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Abstract

A process for preparing antibacterial chitosan and its spinning solution includes such steps as degradating chitosan, reacting on benzaldehyde, reacting of the resultant on 3-chloro-ammonium hydroxypropyltrimethyl chloride and chlorinated ammonium methacryloyloxy trimethyl chloride in isopropanol to obtain O-chitosan quaternary ammonium derivative, and adding its aqueous solution or dispersed DMAc to the queous solution of cellulose NMMO/H2O or LiCl/DMAc solution.

Description

technical field [0001] The invention relates to an antibacterial agent chitosan and a method for preparing and preparing an antibacterial chitosan / cellulose fiber solvent spinning solution. It belongs to chitosan antibacterial agent and the spinning technology applied to cellulose fiber. Background technique [0002] Quaternary ammonium derivatives of chitosan have strong antibacterial properties, and have been used in antibacterial and hygienic finishing of fabrics (De Anjian, Special Collections of Polymers, Natural Polymers (Day), 1998, 47(6): 386) . However, the preparation reactions of chitosan quaternary ammonium salts that have been applied and reported at present all occur on the amino group of chitosan pyranose ring, and the result affects some characteristics of chitosan, the only natural alkaline polysaccharide in nature. For this reason, we have developed a chitosan quaternary ammonium salt grafted on the 6-position hydroxyl group ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N43/16C08B37/08D01F2/10
Inventor 管云林刘晓非庄旭品李治李松晔
Owner TIANJIN UNIV
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