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A kind of preparation method of high performance nanocellulose/chitin composite fiber

A nano-cellulose and nano-chitin technology, applied in the direction of cellulose/protein conjugated rayon, fiber chemical characteristics, conjugated rayon, etc., can solve the problem of rare fibrous, optical properties and mechanical strength can not fully reflect problems such as coming out, to achieve the effect of simple preparation method, good strength and good softness

Active Publication Date: 2018-05-04
江苏斑竹科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Put the purified cellulose in a cellulase solution with a mass fraction of 1%, adjust the pH value to 4.5, enzymolyze it at 45°C for 30 minutes, heat it to 80°C to terminate the reaction, and remove the particles with a diameter greater than A material with a thickness of 1 μm was homogenized by ultrasonic to obtain a suspension of nanocellulose whiskers with a mass fraction of 0.1%, wherein the diameter of the nanocellulose whiskers was 25 nm.

[0027] (2) After the chitin powder is demineralized and protein removed, add a mass fraction of 30% hydrogen peroxide solution to catalyze hydrolysis for 1 hour, and add deionized water that is 6 times the volume of the 30% hydrogen peroxide solution to terminate the reaction , removing substances with a particle size greater than 1 μm through centrifugation, grinding and ultrasonically obtaining a suspension of nano-chitin whiskers with a mass fraction of 0.2%, wherein the diameter of the nano-chitin whiskers is 50 nm.

[...

Embodiment 2

[0031] (1) Put the purified cellulose in a cellulase solution with a mass fraction of 3%, adjust the pH value to 5, enzymolyze it at 55°C for 60 minutes, heat it to 100°C to terminate the reaction, and remove the particles with a diameter greater than A material with a thickness of 1 μm was homogenized by ultrasonic to obtain a suspension of nanocellulose whiskers with a mass fraction of 2%, wherein the diameter of the nanocellulose whiskers was 15 nm.

[0032] (2) After the chitin powder is demineralized and protein removed, add a mass fraction of 30% hydrogen peroxide solution to catalyze hydrolysis for 3 hours, and add deionized water that is 10 times the volume of the 30% hydrogen peroxide solution to terminate the reaction , removing substances with a particle size greater than 1 μm through centrifugation, grinding and ultrasonically obtaining a suspension of nano-chitin whiskers with a mass fraction of 3%, wherein the diameter of the nano-chitin whiskers is 30 nm.

[003...

Embodiment 3

[0036] (1) Put the purified cellulose in a cellulase solution with a mass fraction of 2%, adjust the pH value to 4.5, enzymolyze it at 50°C for 40 minutes, heat it to 90°C to terminate the reaction, and remove particles larger than A material with a thickness of 1 μm was homogenized by ultrasonic to obtain a suspension of nanocellulose whiskers with a mass fraction of 0.5%, wherein the diameter of the nanocellulose whiskers was 20 nm.

[0037] (2) After the chitin powder is demineralized and protein removed, add a mass fraction of 30% hydrogen peroxide solution to catalyze hydrolysis for 2 hours, and add deionized water that is 8 times the volume of the 30% hydrogen peroxide solution to terminate the reaction , removing substances with a particle size greater than 1 μm through centrifugation, grinding and ultrasonically obtaining a suspension of nano-chitin whiskers with a mass fraction of 1%, wherein the diameter of the nano-chitin whiskers is 40 nm.

[0038](3) The nano-cell...

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Abstract

The invention provides a preparation method of a high-performance nanocellulose / chitin composite fiber. The method comprises the following steps: cellulase liquor enzymolysis, centrifugal separation and ultrasonic homogenization are performed on purified cellulose, and a nanocellulose whisker suspension is obtained; catalytic hydrolysis in a hydrogen peroxide liquor, centrifugal separation and grinding ultrasonic treatment are performed on chitin powder after the chitin powder is demineralized and deproteinized, and a nanochitin whisker suspension is obtained; the nanocellulose whisker suspension and the nanochitin whisker suspension are mixed and subjected to vacuum filtration and defoaming, and a composite whisker suspension is formed; the composite whisker suspension is placed in an extrusion container and pressurized and heated to be extruded to a steel wire mesh, pressure drying is performed, and the high-performance nanocellulose / chitin composite fiber is obtained. The fiber prepared with the method is transparent, small in specific gravity and good in toughens and softness.

Description

technical field [0001] The invention belongs to the technical field of textile materials, and in particular relates to a preparation method of a high-performance nanocellulose / chitin composite fiber. 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 excellent...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F8/02D01F8/18C08L1/02C08L5/08
CPCC08L1/02C08L2201/08C08L2201/10C08L2203/12C08L2205/16D01F8/02D01F8/18C08L5/08
Inventor 李书成
Owner 江苏斑竹科技有限公司