Cellulose-polyacrylonitrile composite fiber and its production process

A polyacrylonitrile and composite fiber technology, which is applied in the direction of cellulose/protein conjugated artificial filament, conjugated synthetic polymer artificial filament, fiber treatment, etc., can solve the problem of high cost, poor stability of acrylic fiber, and no involvement Problems such as the preparation method of cellulose and polypropylene nitrile composite fibers, etc., to achieve the effect of reducing costs and reducing losses

Active Publication Date: 2008-08-13
CHINESE TEXTILE ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because of the chemical method, the cost in the preparation process is relatively high, and the stability of the obtained acrylic fiber is not good.
[0005] Ionic liquid is a new solvent that can directly dissolve cellulose after N-methylmorpholine-N-oxide (NMMO), and it is also a solvent for polyacrylonitrile, such as patents US6824599, CN1417407, CN1491974, WO2006000197 etc. disclose the method for dissolving and processing cellulose with ionic liquid as solvent, and patents CN1560097A, CN1752305A etc. disclose the method for preparing polyacrylonitrile stock solution and spinning polyacrylonitrile fiber with ionic liquid as solvent, but these patents are for cellulose and The composite fiber of polyacrylo

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 143 parts of chlorinated 1-butyl-3-methylimidazolium ionic liquid and 15 parts of DMSO were uniformly mixed (all fractions represent mass fractions) to prepare a mixed solvent; 17.25 parts of cellulose derived from cotton pulp were added to 106 Parts of mixed solvent to prepare cellulose solution; then add 11.5 parts of polyacrylonitrile to 53 parts of mixed solvent to obtain polyacrylonitrile solution, heat up the cellulose and the polyacrylonitrile solution respectively, The two solutions were mixed and stirred evenly at 120°C, then metered and output through a metering pump and a spinneret, and the filaments were fed into 35% 1-butyl-3-methylimidazolium chloride ionic liquid / DMSO (the mass ratio of the two is the same as that of the mixed Solvent) in the aqueous solution of stretching and coagulation forming, drafting 6.5 times, after washing and drying, the blended composite fiber with strength of 3.7cN / dtex, elongation at break of 14%, and moisture regain of 13% was...

Embodiment 2

[0029] Add 16 parts of cellulose derived from wood pulp to 84 parts of acetic acid 1-ethyl-3 methylimidazolium ionic liquid to obtain a cellulose solution; then add 20 parts of polyacrylonitrile to 80 parts of acetic acid 1-ethyl- In the 3-methylimidazolium ionic liquid, the polyacrylonitrile solution is prepared, the temperature of the cellulose and the polyacrylonitrile solution are respectively raised, and the two solutions are mixed and stirred at 125 ° C, and then passed through the metering pump 1. The spinneret is metered and output, and the filaments are drawn into an aqueous solution of 20% acetic acid 1-ethyl-3 methylimidazolium ionic liquid at 30°C for drafting and solidification, and the draft is 7 times. After washing and drying, the obtained strength is 4cN / dtex, elongation at break of 16%, moisture regain of 11.5% blended composite fiber. The appearance and feel of the fiber are similar to wool, and the dyeability is excellent.

Embodiment 3

[0031] 256 parts of chlorinated 1-propyl-3 methylimidazolium ionic liquids and 11 parts of DMSO are mixed homogeneously (all parts represent mass parts) to make a mixed solvent; 25 parts of cellulose derived from wood pulp are added to 100 parts 56 parts of polyacrylonitrile was added into 167 parts of mixed solvent to obtain a polyacrylonitrile solution, and the temperature of the cellulose and the polyacrylonitrile solution was raised respectively. Mix and stir these two solutions at 130°C, then pass through the metering pump and spinneret to measure and output, and the filaments will enter 50% chlorinated 1-propyl-3 methylimidazolium ionic liquid / DMSO (the mass ratio of the two is the same as that of the mixed solvent ) in an aqueous solution, stretched and coagulated, stretched 7.5 times, washed and dried to obtain a blended composite fiber with a strength of 4.2cN / dtex, an elongation at break of 18%, and a moisture regain of 8%. The appearance and feel of the fiber are si...

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Abstract

The invention relates to a cellulose-polyacrylonitrile composite fiber and a manufacturing method of the same, the inventive method is characterized in that the composite fiber is a bending type or sheath-core type, the mass ratio of cellulose and polyacrylonitrile is 1:99 to 80:20 in the cortex of bending type or sheath-core type, the core layer of sheath-core type is made of the cellulose or polyacrylonitrile; the manufacturing method is that a ionic liquid is a solvent, also the organic solvent is a cosolvent, the organic solvent includes one or more N-N-dimethylacetamide, N-N-dimethylformamide or dimethyl sulfoxide. The bending type or sheath-core type composite fiber is formed after deairing, filtering, spinning, freezing, drawing, washing, drying and other steps, the fiber has a microporous structure which endows the characteristic of moisture absorption, breathable, coloring, good health, and other because of the moisture absorption of cellulose and the semi-compatibility of polyacrylonitrile; the ionic liquid is used in the production process being more green environmental protection.

Description

technical field [0001] The invention relates to a cellulose-polyacrylonitrile composite fiber and a manufacturing method thereof, in particular to a method for preparing a cellulose-polyacrylonitrile composite fiber using an ionic liquid as a solvent and a product thereof. Background technique [0002] Acrylic is one of the three major synthetic fibers. Because its softness and warmth are very similar to wool, it is also called "synthetic wool". Therefore, polyacrylonitrile fibers are widely used as "wool-like" fibers instead of wool. However, it also has the characteristics of poor moisture absorption, moisture permeability and water retention of synthetic fibers, so as a clothing fiber, it feels stuffy and uncomfortable to wear. Therefore, the application in underwear, shirts, sportswear, etc. is limited. [0003] Cellulose is the largest organic renewable resource in nature. In the future, when oil is depleted and people's awareness of environmental protection is increa...

Claims

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Application Information

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IPC IPC(8): D01F8/08D01F8/02D01D5/34
Inventor 李晓俊孙玉山骆强陆伊伦徐成朱庆松
Owner CHINESE TEXTILE ACAD
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