Preparation method of functional chitosan fiber

Abstract

The present invention relates to a preparation method for preparing functional chitosan fibers. The method comprises the steps of 1) dissolving the low-molecular-weight chitosan in a chitosan solvent to prepare a carrier solution; 2) under the strong shearing action of a stirring device, mixing up functional powders with the carrier solution to prepare a functional mother liquid; 3) injecting the functional mother liquid into a chitosan spinning solution in the online addition manner to obtain a functional spinning solution; and preparing functional chitosan fibers through the extruding, solidifying and stretching process of the functional spinning solution. According to the technical scheme of the invention, the problem in the prior art that functional powders and the spinning solution are different to mix up and uneven in dispersion according to the traditional method can be solved. An adopted carrier is formed along with the solidification process of fibers, while no extra assistant is fed into a solvent and coagulating bath system. The forming method is simple and efficient, and the production of functional chitosan fibers can be realized based on a conventional production line.

Description

Technical field [0001] The invention belongs to the field of functional fibers and relates to a method for preparing functional chitosan fibers. Background technique [0002] The chemical name of chitosan is polyglucosamine (1-4)-2-amino-B-D glucose, which is obtained by deacetylation of chitin, which is widespread in nature. Chitosan has excellent biocompatibility, antibacterial and degradable properties, and is a widely used natural polymer. Chitosan can be dissolved in organic acid and inorganic acid, and formed into chitosan fiber by wet spinning. At present, the industrial production of chitosan fibers includes the following steps: dissolving chitosan in an acetic acid solution to prepare a chitosan spinning solution; the chitosan spinning solution is extruded and then enters the sodium hydroxide coagulation bath to solidify and form ; Post-treatment procedures can also be added to enhance the mechanical properties and antibacterial properties of the nascent fiber. [0003]...

AI Technical Summary

Problems solved by technology

The addition of graphene oxide improves the mechanical strength of chitosan fibers to a certain extent, but the mixing time of chitosan and graphene oxide is as long as 6 hours, and the excessively long mixing process will inevitably reduce the molecular weight of chitosan, resulting in The strength of the prepared chitosan / graphene oxide composite fiber is not higher than 160MPa, which lacks practical use value (Mechanical and dieadsorption properties of graphene oxide / chitosan composite fibers prepared by wet spinning.Carbohydrate polymers,2014,102:755-761. )