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Modified-nanometer-cellulose-enhanced polyacrylonitrile fiber and preparing method and application thereof

A polyacrylonitrile fiber and nanocellulose technology, applied in the direction of fiber chemical characteristics, rayon manufacturing, single-component synthetic polymer rayon, etc., to solve the problem of interface compatibility, expand uses, huge economic value and social benefit effect

Active Publication Date: 2019-05-21
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Most of the published acrylic fiber-related patent reports focus on the functionalization of acrylic fiber, such as flame retardancy (Chinese patent application number 2015101883251), anti-pilling property (Chinese patent application number 2012103590942), antibacterial properties (Chinese patent application number 2016104843744 ), UV resistance (Chinese Patent Application No. 2015104585036) and electrical conductivity (Chinese Patent Application No. 2008100742254); however, there are currently few patent reports on the direct reinforcement of acrylic fibers by modified cellulose nanofibrils

Method used

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  • Modified-nanometer-cellulose-enhanced polyacrylonitrile fiber and preparing method and application thereof

Examples

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Effect test

Embodiment 1

[0036] A modified nano-cellulose reinforced polyacrylonitrile fiber, the preparation method of which is as follows:

[0037] (1) Take bamboo fiber as raw material, and obtain nanocellulose after being processed several times with an ultrafine particle pulverizer. The treatment conditions of the ultrafine pulverizer are: the slurry concentration is 0.1%, the disc grinding gap is -100 μm, and the treatment times are 10 times.

[0038] (2) Oxidizing the C2 and C3 positions of the glucopyranose structural unit in the nanocellulose prepared in the step (1) with sodium periodate to generate cellulose with a 2,3-dialdehyde structure. The sodium periodate oxidation condition is: adding 1 g of sodium periodate to each gram of nanocellulose, reacting at 40° C. in the dark for 1 hour, and stirring at a speed of 100 r / min.

[0039] (3) Treat the cellulose with 2,3-dialdehyde structure prepared in step (2) with hydroxylamine hydrochloride at a temperature of 25°C for a period of time to o...

Embodiment 2

[0044] A modified nano-cellulose reinforced polyacrylonitrile fiber, the preparation method of which is as follows:

[0045] (1) Using straw fiber as a raw material, the nanocellulose is obtained after being processed several times with an ultrafine pulverizer. The treatment conditions of the ultrafine pulverizer are as follows: the slurry concentration is 20%, the disc grinding gap is 200 μm, and the treatment times are 10 to 100 times.

[0046] (2) Oxidizing the C2 and C3 positions of the glucopyranose structural unit in the nanocellulose prepared in the step (1) with sodium periodate to generate cellulose with a 2,3-dialdehyde structure. The sodium periodate oxidation condition is as follows: add 5 g of sodium periodate per gram of nanocellulose, react at 80° C. in the dark for 2 hours, and stir at a speed of 500 r / min.

[0047] (3) Treat the cellulose with 2,3-dialdehyde structure prepared in step (2) with hydroxylamine hydrochloride at a certain temperature for a period ...

Embodiment 3

[0052] A modified nano-cellulose reinforced polyacrylonitrile fiber, the preparation method of which is as follows:

[0053] (1) Take eucalyptus fiber as raw material, and obtain nanocellulose after being processed several times with an ultrafine pulverizer. The treatment conditions of the ultrafine pulverizer are: the slurry concentration is 10%, the disc grinding gap is -50 μm, and the treatment times are 50 times.

[0054] (2) Oxidizing the C2 and C3 positions of the glucopyranose structural unit in the nanocellulose prepared in the step (1) with sodium periodate to generate cellulose with a 2,3-dialdehyde structure. The sodium periodate oxidation condition is as follows: add 3 g of sodium periodate per gram of nanocellulose, react at 60° C. in the dark for 1 hour, and stir at a speed of 1000 r / min.

[0055] (3) Treat the cellulose with 2,3-dialdehyde structure prepared in step (2) with hydroxylamine hydrochloride at a certain temperature for a period of time to obtain cel...

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Abstract

The invention belongs to the field of high polymer materials, and discloses a modified-nanometer-cellulose-enhanced polyacrylonitrile fiber and a preparing method and application thereof. The preparing method for the modified-nanometer-cellulose-enhanced polyacrylonitrile fiber includes the steps that plant cellulose serves as a raw material, cyanogroup-containing nanometer cellulose is prepared through specific selective oxidation and chemical treatment, then cyanogroup-containing nanometer cellulose is doped into a polyacrylonitrile spinning solution, wet spinning, drafting, washing and drying treatment are conducted, and then the modified-nanometer-cellulose-enhanced polyacrylonitrile fiber is obtained. The modified-nanometer-cellulose-enhanced polyacrylonitrile fiber has good tensile strength, the elasticity modulus is greatly improved, and the modified-nanometer-cellulose-enhanced polyacrylonitrile fiber can be applied to spinning materials such as a flat polyacrylonitrile fiber,a high-modulus polyacrylonitrile fiber and a friction-resisting acrylic fiber and the textile field.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a modified nano-cellulose reinforced polyacrylonitrile fiber and a preparation method and application thereof. Background technique [0002] Acrylic fiber is known as artificial wool. It has the advantages of softness, bulkiness, easy dyeing, bright color, light resistance, antibacterial, and no fear of insects. According to the requirements of different uses, it can be purely spun or blended with natural fibers. Its textiles are widely used. Used in clothing, decoration, industry and other fields. Acrylic fibers are unique in the orderly arrangement of internal macromolecules, showing an irregular helical conformation, and there is no strict crystallization region. Pure polyacrylonitrile fibers have poor hygroscopicity and are difficult to dye. [0003] Nanocellulose can be divided into cellulose nanowhiskers and cellulose nanofibrils, which have become widely stud...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/54D01F1/10C08B15/06C08B15/02
Inventor 李金鹏王斌陈克复
Owner SOUTH CHINA UNIV OF TECH
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