Method for producing chitosan fiber with high hydroscopic property

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 ethanol, adding hydrochloric acid and adjusting the pH value of the mixed solution to be 2-6; 2, soaking the chitosan fiber in the ethanol for 30-60 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 ethanol 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...

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 invention patent with the patent No. ZL200510088100.5, a method of manufacturing an antibacterial medical dressing is disclosed, which is made by treating chitosan fibers with chloroacetic acid under alkaline conditions, and the treated chitosan The fiber has the characteristics of high water absorption, but this method uses a large amount of toxic chloroacetic acid in the production process. During the reaction process, the reaction of chloroacetic acid is not complete and there are residues. The treated fiber must be cleaned with a large amount of organic solvent, resulting in cost Too high is not conducive to industrial production, and it will cause certain harm to the operator's body during the production process