Preparation method of composite fibers capable of being gelatinized

Abstract

The invention discloses a preparation method of composite fibers capable of being gelatinized, and belongs to the technical field of textile fibers. The preparation method comprises the steps that chitosan and a fiber-forming high polymer are adopted to prepare a spinning solution, and then the spinning solution is subjected to spinning, solidification forming and post-treatment to prepare the composite fiber material which can be gelatinized at a certain pH, temperature or pressure. The prepared chitosan / fiber-forming high polymer composite fiber has excellent air permeability, swelling property, biodegradability and the like, can be used as a substitute of traditional hydrogel, and is widely applied to the fields of wound dressings, skin care products, cosmetics, heat insulation materials, sound insulation materials and the like.

Description

Technical field [0001] The present invention belongs to the technical field of textile fibers, and more particularly to a method of preparing a gelation of composite fibers. Background technique [0002] Chitosan is a natural polymer material with antimicrobial properties, and there are many varieties, extensive sources, biodegradable performance and biocompatibility, are widely used in biomedical, tissue engineering, food, textile, chemical, etc. field. Among them, the chitosan fibers can be prepared by wet spinning method, but the mechanical properties of chitosan fibers are not ideal (the dry state breakage intensity is less than 1.8 cn / dtex), affecting the processing and use of the fibers. Therefore, other forming fibers are combined with chitosan to prepare composite fibers, and the excellent properties of the chitosan can be preserved, and the mechanical properties of the fibers can be improved. [0003] The hydrogel fiber has a fiber or fiber shape, which increases its s...

AI Technical Summary

Problems solved by technology

The current smart hydrogel fibers are soft and wet materials composed of responsive polymers and water, which can respond to external temperature, light, pH, and electromagnetic field stimuli, and undergo volume, length, diameter and other shapes or self-absorption. Or the change of slow-release performance, and many hydrogel fibers use chitosan as the hydrogel matrix material, but in the process of processing fibers, most of them add chemical cross-linking agents, which makes the product not completely degraded , will still pollute the environment

For example, in the preparation of a hollow hydrogel fiber disclosed in patent CN104939946A and the method for constructing branched vascular units, the required hollow hydrogel fiber is made by cross-linking chitosan and sodium tripolyphosphate. When preparing the fiber The sodium tripolyphosphate cross-linking agent used will produce irritating and toxic gases during thermal decomposition, which may cause eye, skin, and respiratory irritation; and the cross-linking agent cannot be degraded completely

Patent CN101624778A discloses a kind of production method of superabsorbent chitosan fiber, first all dissolves succinic anhydride in ethanol and adds hydrochloric acid to make mixed solution, after the chitosan fiber is soaked in ethanol and then dehydrated; The dehydrated chitosan fiber and the mixed solution are placed in a constant temperature water bath, and then dehydrated; finally, the chitosan fiber is soaked in a mixed solution of polysorbate (Tween) series surfactants and absolute ethanol, Dehydration and drying; but the obtained fiber component is only chitosan, the mechanical properties of the fiber have certain deficiencies, and the process is cumbersome

[0004] Because most of the current hydrogel fibers need to add chemical cross-linking agents during the preparation process, the mechanical properties are insufficient, the preparation process is cumbersome, the cost is high, and the gelation time is uncontrollable, which cannot reflect the properties of hydrogel fibers more flexibly. Functionality, so the preparation of a smart gel fiber with good mechanical properties without adding a crosslinking agent still needs to be explored and improved