Method for producing chitosan fiber with high hydroscopic property

A chitosan fiber, high water absorption technology, applied in fiber treatment, animal fibers, absorbent pads, etc., can solve the problems of insufficient liquid absorption, unfavorable industrial production, low water absorption ratio, etc., to increase the surface area, promote wound healing effect

Active Publication Date: 2010-01-13
QINGDAO JIFA GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, ordinary chitosan fibers have a smooth surface and most of them are water-repellent. When in contact with a wound, they cannot absorb the exudate or blood of the wound. Although they have hemostatic function, they cannot achieve the purpose of rapid hemostasis.
[0004] Some existing technologies have given the treatment of chitosan fibers with hydrophilic solvents in order to make them hydrophilic, but most of them are limited to not repelling water, or the surface is hydrophilic and the water absorption rate is low. Poor performance, can not achieve the purpose of absorbing liquid, still can not achieve the purpose of rapid hemostasis, which is not conducive to the rapid healing of wounds
[0005] In the inve

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Step 1, according to the ratio of 0.02g / ml, take 2g of succinic anhydride and dissolve it in 100ml of absolute ethanol, stir until the solid of succinic anhydride is completely dissolved, add 0.1mol / l hydrochloric acid to the mixed solution to adjust the pH to 4;

[0025] Step 2, taking a chitosan fiber whose dry weight is 10g and having a deacetylation degree of 85%, soaking it in absolute ethanol for 30 minutes, then taking out the chitosan fiber and centrifuging for 2 minutes;

[0026] Step 3, put the dehydrated chitosan fiber and the mixed solution with adjusted pH value together in a constant temperature water bath, heat in the water bath at 30 degrees Celsius for 10 minutes, take out the chitosan fiber, centrifuge and dehydrate for 2 minutes, and then rinse with absolute ethanol 10min, centrifugal dehydration 2min;

[0027] Step 4, put the chitosan fiber after water bath and rinsing into the mixture of Tween60 and absolute ethanol for 30 minutes, take it out, cent...

Embodiment 2

[0029] Step 1, according to the ratio of 0.075g / ml, get 30g succinic anhydride and be dissolved in 400ml concentration and be in the ethanol of 90%, stir until succinic anhydride solid all dissolves, in the mixed solution, drip the hydrochloric acid of 1mol / l to adjust pH to be 3;

[0030] Step 2, take the chitosan fiber that the deacetylation degree of 180g is 88%, soak it in 90% ethanol first after 60min, take out the chitosan fiber and centrifuge for 8min;

[0031] Step 3, put the dehydrated chitosan fiber and the mixed solution after adjusting the pH value together in a constant temperature water bath, heat the water bath at 60 degrees Celsius for 30 minutes, take out the chitosan fiber, centrifuge for 4 minutes, and then use 90% ethanol Rinse for 20 minutes, centrifuge for 7 minutes;

[0032] Step 4, put the chitosan fiber after water bath and rinsing into the mixture of Tween20 and absolute ethanol for 35 minutes, take it out, centrifuge and dehydrate for 4 minutes, and...

Embodiment 3

[0034] Step 1, according to the ratio of 0.1g / ml, get 50g succinic anhydride and be dissolved in 500ml concentration and be in the ethanol of 95%, stir until succinic anhydride solid all dissolves, in the mixed solution, drip the hydrochloric acid of 1mol / l and adjust pH to be 3;

[0035]Step 2, take the chitosan fiber whose dry weight is 200g and the degree of deacetylation is 90%, soak it in 95% ethanol for 60min, then take out the chitosan fiber and centrifuge for 8min;

[0036] Step 3, put the dehydrated chitosan fiber and the mixed solution after adjusting the pH value together in a constant temperature water bath, heat the water bath at 40 degrees Celsius for 30 minutes, take out the chitosan fiber, centrifuge for 4 minutes, and then use 95% ethanol Rinse for 20 minutes, centrifuge for 7 minutes;

[0037] Step 4, put the chitosan fiber after water bath and rinsing into the mixture of Tween20 and absolute ethanol for 35 minutes, take it out, centrifuge and dehydrate for ...

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PUM

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Abstract

The invention relates to a method for producing a chitosan fiber with high hydroscopic property, which comprises the following specific steps: 1, fully dissolving butanedioic anhydride into absolute ethyl alcohol or ethanol or industrial alcohol, adding hydrochloric acid and adjusting the pH value of the mixed solution to be 2-6; 2, soaking the chitosan fiber in the absolute ethyl alcohol or the ethanol or the industrial alcohol for 60 minutes and dewatering; 3, placing the dewatered chitosan fiber and the mixed solution of the step 1 into a thermostatic water bath for 5 to 120 minutes, dewatering the chitosan fiber, flushing the chitosan fiber with the absolute ethyl alcohol or the ethanol or the industrial alcohol and then dewatering; and 4, placing the chitosan fiber into mixed solution of Tween series surfactants and the absolute ethyl alcohol for soaking, dewatering and air-drying. The chitosan fiber produced by the method has the characteristic that gel is formed when encountering water, can absorb effluent liquid flowing from wound, ensures that the chitosan fiber is fully contacted with the wound surface to achieve the functions for quickly absorbing the blood on the wound surface, diminishing inflammation and promoting the wound to heal, and ensures that the periphery of the wound is maintained in the moisture environment in the healing process so that the wound easily heals.

Description

technical field [0001] The invention relates to a production method of chitosan fiber, in particular to a production method of superabsorbent chitosan fiber. Background technique [0002] Traditional medical dressings use absorbent cotton or other absorbent fibers as raw materials. The general characteristics of these materials are that they only have liquid absorption, but do not have anti-inflammatory or hemostatic functions. When applied to a wound, the wound heals slowly. [0003] Chitosan has good functions of antibacterial, hemostasis, anti-inflammation, and promotion of wound healing, and has good spinnability, so it can be used as medical dressings in the form of non-woven fabrics, knitted fabrics, etc. It is an ideal medical dressing for trauma Material. However, ordinary chitosan fibers have a smooth surface and most of them are water-repellent. When in contact with a wound, they cannot absorb the effluent or blood of the wound. Although they have hemostatic funct...

Claims

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Application Information

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IPC IPC(8): D06M13/192D06M13/224A61L15/28A61L15/42A61L15/46A61L15/60D06M101/10
Inventor 黄聿华衣宏君万国晗
Owner QINGDAO JIFA GROUP
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