High-performance nano-crystalline cellulose/chitin composite fibers and preparing method thereof

Abstract

The invention provides a preparing method of high-performance nano-crystalline cellulose/chitin composite fibers. The preparing method comprises the following steps that purified cellulose is subjected to enzymolysis with a cellulase solution, centrifugal separation and ultrasonic homogenization, and then a nano-crystalline cellulose whisker suspension is obtained; mineral substances and protein of chitin powder are removed, then the chitin powder is subjected to catalytic hydrolysis in a hydrogen peroxide solution, centrifugal separation and ultrasonic grinding, and a nano-chitin whisker suspension is obtained; the nano-crystalline cellulose whisker suspension and the nano-chitin whisker suspension are mixed and subjected to vacuum filtration and defoaming, and a composite whisker suspension is obtained; the composite whisker suspension is put into an extrusion vessel, pressurized, heated, extruded and then put on a steel wire mesh, pressure is applied, drying is carried out, and the nano-crystalline cellulose/chitin composite fibers are obtained. The fibers prepared from the method are transparent, small in specific gravity and good in toughness and flexibility.

Description

technical field [0001] The invention belongs to the technical field of textile materials, and in particular relates to a high-performance nanocellulose / chitin composite fiber and a preparation method thereof. Background technique [0002] With the continuous advancement of science and technology, more and more new fibers have emerged. In the application of modern materials, high refractive index materials in optical materials have good application value. High refractive index optical materials can reduce the specific gravity of materials without affecting the refractive properties of materials, making materials lightweight and miniaturized. [0003] With the continuous development of nanotechnology, nanocomposite technology provides a new development direction for high refractive index optical materials. Materials will show many strange properties when they enter the nanoscale. The combination of biological resources and nanotechnology can develop functional products with ...

AI Technical Summary

Problems solved by technology

It can be seen from the above-mentioned prior art that the current high-refractive-index optical materials based on nanofibers usually require transparent resin as a binder to compound the nanofibers together to form an optical material. The main mechanical strength is still based on the strength of the resin. Nanofibers In transparent resin, it can enhance the strength, but its own optical properties and mechanical strength cannot be fully reflected, and most of the prepared materials are in the form of films, and fibrous forms are very rare.