A kind of preparation method of propionyloxyethyltrimethylammonium chloride chitosan fiber

A technology of propionyloxyethyltrimethylammonium chloride and alkalization of chitosan fibers, which is applied in fiber treatment, textiles and papermaking, etc., can solve the problem of unsatisfactory effects, weak antibacterial properties of chitosan fibers, Poor liquid absorption and other problems, to achieve the effect of increasing the characteristics of polycations, promoting wound healing, and low cost

Inactive Publication Date: 2016-08-24
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the chitosan fibers prepared by these methods still have defects such as weak antibacterial properties and poor liquid absorption in the clinical application of chronic wounds, and the effect is not ideal, which greatly limits its application.

Method used

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  • A kind of preparation method of propionyloxyethyltrimethylammonium chloride chitosan fiber
  • A kind of preparation method of propionyloxyethyltrimethylammonium chloride chitosan fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033]Weigh 5 g of chitosan fibers and disperse them in 125 mL of pyridine, stir at room temperature for 1 h, take out the chitosan fibers, and dry them in vacuum. Disperse the dried chitosan fiber in 250mL of methanol, add 5.28g of acryloyloxyethyltrimethylammonium chloride, stir evenly at room temperature, and react in a constant temperature water bath at 60°C for 24h. Chitosan fibers are separated from the reaction mixture liquid, and the isolated chitosan fibers are dispersed in 80% (V / V) methanol aqueous solution, 15% (V / V) acetic acid aqueous solution is added dropwise, methanol and acetic acid aqueous solution are mixed Adjust the pH of the liquid to 7.2, shake for 30 minutes, separate the soaked chitosan fibers from the mixed solution, wash 3 times with 80% (V / V) methanol aqueous solution, and vacuum dry at 40°C after centrifugal dehydration , to obtain propionyloxyethyltrimethylammonium chloride chitosan fiber with a substitution degree of 20%.

Embodiment 2

[0035] Weigh 5 g of chitosan fibers and disperse them in 125 mL of 2-picoline, stir at room temperature for 6 h, take out the chitosan fibers, and dry them in vacuum. Disperse the dried chitosan fiber in 250mL of ethanol, add 52.8g of acryloyloxyethyltrimethylammonium chloride, stir evenly at room temperature, and react in a constant temperature water bath at 70°C for 48h, and the reacted Chitosan fiber is separated from the reaction mixture liquid, and the chitosan fiber separated is dispersed in 80% (V / V) ethanol aqueous solution, 15% (V / V) acetic acid aqueous solution is added dropwise, ethanol, acetic acid aqueous solution are mixed Adjust the pH of the solution to 6.0, shake for 30 minutes, separate the soaked chitosan fiber from the mixed solution, wash 3 times with 80% (V / V) ethanol aqueous solution, centrifuge and dehydrate, and vacuum dry at 40 ° C. , to obtain propionyloxyethyltrimethylammonium chloride chitosan fiber with a substitution degree of 46%.

Embodiment 3

[0037] Weigh 5 g of chitosan fibers and disperse them in 125 mL of 3-picoline, stir at room temperature for 12 h, take out the chitosan fibers, and dry them in vacuum. Disperse the dried chitosan fiber in 250mL of propanol, add 105.6g of acryloyloxyethyltrimethylammonium chloride, stir evenly at room temperature, and react in a constant temperature water bath at 80°C for 72h. The chitosan fiber and the reaction mixture liquid are separated, and the chitosan fiber that is separated is dispersed in 80% (V / V) acetone aqueous solution, is added dropwise 15% (V / V) acetic acid aqueous solution, acetone, acetic acid aqueous solution The pH of the mixed solution was adjusted to 7.5, shaken for 30min, then the soaked chitosan fiber was separated from the mixed solution, washed 3 times with 80% (V / V) acetone aqueous solution, and after centrifugal dehydration, vacuum at 40°C Dry to obtain propionyloxyethyltrimethylammonium chloride chitosan fiber with a substitution degree of 52%.

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Abstract

The invention relates to a preparation method of propionyloxy ethyl trimethyl ammonium chloride chitosan fiber. The preparation method comprises the steps of dispersing alkalized chitosan fibers in alcohol, and adding with acryloyloxy ethyl trimethyl ammonium chloride for water bath reaction; separating from mixed solution of alcohol and acryloyloxy ethyl trimethyl ammonium chloride to obtain propionyloxy ethyl trimethyl ammonium chloride chitosan fiber; dispersing into organic solvent aqueous solution, dropwise adding acetic acid aqueous solution, adjusting the pH value, oscillating and separating; and washing, and performing centrifugal dewatering and vacuum drying to obtain the propionyloxy ethyl trimethyl ammonium chloride chitosan fiber. The preparation method has the beneficial effects that (1) the polycation characteristic of the chitosan fiber is improved and the antibacterial property of the chitosan fiber is improved; (2) the reacted fiber has the characteristics of high antibacterial property and high liquid absorbing property, and the base form and the integrity of the fiber can be kept after liquid absorbing; and (3) the preparation method of the propionyloxy ethyl trimethyl ammonium chloride chitosan fiber is simple, the cost is low and the method is easy to realize industrial production.

Description

technical field [0001] The invention relates to a preparation method of chitosan fiber, in particular to a preparation method of propionyloxyethyltrimethylammonium chloride chitosan fiber, which belongs to the field of preparation of fiber materials. Background technique [0002] The incidence of chronic difficult-to-heal wounds, such as ulcers and decubitus ulcers, has been increasing year by year with the aging of the population in recent years. For typical chronic refractory wounds, there are generally three characteristics: the wound is susceptible to infection; the wound has moderate to large amount of exudate; and the wound is painful. Although there are different types of dressings used in the treatment or nursing of chronic wounds clinically, they are all unsatisfactory and have some defects to varying degrees, such as weak anti-infection performance, drug allergy, poor ability to absorb exudate, and low wet strength. Poor wait. Chitosan, as the second largest natu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M14/02
Inventor 吕波许然然付芳郑化雷春雨
Owner WUHAN UNIV OF TECH
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