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Preparation method of polyacrylonitrile fibres by using protein as modifier

A technology of polyacrylonitrile fiber and polyacrylonitrile, which is applied in the field of preparation of polyacrylonitrile fiber, can solve problems such as cumbersome process parameters, endangering the health of operators, a large amount of waste gas and waste water, etc., to increase economic benefits and improve production Efficiency, ease of recycling

Inactive Publication Date: 2013-11-20
SUZHOU LONGJIE SPECIAL FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patents with application numbers 02139295.1, 011331919.4 and 03148421.2 disclose methods for preparing protein and polyacrylonitrile graft copolymerized fiber spinning dope and fibers, but the problem with this method is that the grafting rate of acrylonitrile is relatively low, and the copolymerized method, the technical route is more complicated, the grafting rate is difficult to control, and the manufacturing cost is relatively increased
However, the solvents used in the above method in the spinning solution preparation process are organic reagents or inorganic salts. Organic solvents are volatile, causing serious pollution to the environment and endangering the health of operators; and inorganic reagents are highly corrosive. , extremely corrosive to the equipment
In addition, the recovery of these chemical reagents requires multi-stage decompression evaporation and multi-stage crystallization settling. The entire recovery process is not only cumbersome and requires strict control of process parameters, but also produces a large amount of waste gas and waste water, causing serious damage to the environment. Pollution

Method used

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  • Preparation method of polyacrylonitrile fibres by using protein as modifier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Raw material: silk protein, protein content 90%;

[0040] Polyacrylonitrile, with a viscosity-average molecular weight of 2.0×104, is a copolymer comprising a first monomer, a second monomer and a third monomer, wherein the first monomer is 81.8% by mass of acrylonitrile, and the first The mass percent of the second monomer methyl acrylate is 18%, and the content of the third monomer itaconic acid is 0.2%;

[0041] Ionic liquid, 1-allyl-3-methylimidazolium chloride.

[0042] Mix dry silk protein with a mass percentage of 1% and dry polyacrylonitrile with a mass percentage of 99%, add it to 1-allyl-3-methylimidazolium chloride, and dissolve it at 50°C for 2 hours to obtain a stable Uniform spinning solution, the mass percentage of 1-allyl-3-methylimidazolium chloride in the solution is 95%, the spinning solution is filtered and defoamed at 50°C, extruded through a metering pump and a spinneret, and passed through 1cm layer of humid air, temperature is 5°C, humidity is ...

Embodiment 2

[0044] Raw material: wool protein, protein content 92%;

[0045] Polyacrylonitrile, with a viscosity-average molecular weight of 2.0×105, is a copolymer comprising a first monomer and a second monomer, wherein the content of the first monomer is 90% of acrylonitrile, and the second monomer is methyl methacrylate The content of ester is 10%;

[0046] Ionic liquid, 1-butyl-3-methylimidazolium chloride.

[0047] Mix 20% wool protein with 80% polyacrylonitrile, add 1-butyl-3-methylimidazolium chloride, swell at 30°C for 2 hours, dehydrate, dissolve at 120°C for 1.5 hours, Obtain a stable and uniform spinning solution, the mass percentage of 1-butyl-3-methylimidazolium chloride in the solution is 92%, filter and defoam at 120°C, extrude through a metering pump and a spinneret, and pass through a 2cm wet In the air layer, the temperature is 15°C, the humidity is 80%, enter the coagulation bath at 0°C, the mass percentage of 1-butyl-3-methylimidazolium chloride in the coagulation b...

Embodiment 3

[0049] Raw materials: soybean protein, protein content 94%;

[0050] Polyacrylonitrile, with a viscosity average molecular weight of 5.0×104, is an acrylonitrile homopolymer;

[0051] Ionic liquid: 1-butyl-2-methylpyrazole bromide.

[0052] Mix 1% of dry soybean protein with 99% of 1-butyl-2-methylpyrazole bromide in mass percentage, dissolve at 70°C for 2 hours to obtain solution ①; mix 15% of Mix dry polyacrylonitrile with 85% by mass of 1-butyl-2-methylpyrazole bromide, dissolve at 80°C for 1 hour to obtain solution ②, then mix equal amounts of solution ①②, and stir at 80°C After 0.5 hours to obtain a stable and uniform spinning solution, filter and defoam at 80°C, extrude through a metering pump and a spinneret, pass through a 3cm layer of humid air at a temperature of 15°C and a humidity of 75%, and enter a coagulation bath at 20°C. The mass percent of 1-butyl-2-methylpyrazole bromide in the coagulation bath is 8%, and enters the hot water bath of 50 ℃ through the guide...

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Abstract

The invention relates to a preparation method of polyacrylonitrile fibres by using protein as a modifier. The preparation method comprises the following steps of (1) dissolving protein and polyacrylonitrile in an ionic liquid, and preparing a homogeneous-phase mixed spinning solution; (2) defoaming, filtering and measuring the spinning solution, and then extruding via a spinning jet to form a spinning trickle flow, and passing the spinning trickle flow through a humid air layer and then entering into a coagulating bath, and performing coagulating forming; and (3) performing pre-drawing, drawing, water-washing, drying and heat-setting, and then performing spinning forming, so as to prepare protein-modified polyacrylonitrile filaments or short fibres.

Description

technical field [0001] The invention belongs to the field of preparation methods of polyacrylonitrile fibers, in particular to a preparation method of protein-modified polyacrylonitrile fibers. Background technique [0002] The main component of protein is a peptide chain composed of amino acids. It has many amino acids necessary for the human body, and has good biocompatibility and skin care and health care functions. Protein fibers including silk and wool have always been popular with consumers. However, natural The output of protein fiber is limited, it is difficult to meet the demand of the market, so the technology of using natural protein raw materials to produce regenerated protein fiber was born. However, the regenerated protein fiber prepared from pure protein is difficult to meet practical requirements due to its low strength. [0003] Polyacrylonitrile fiber has a wool-like feel and good bulkiness. It is called "synthetic wool". It is a light fiber with good drap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/54D01F1/10D01F1/02D01F8/08D01F8/02D01D13/00D01D1/02D01D5/06D01D10/06
Inventor 徐醒我关乐赵满才
Owner SUZHOU LONGJIE SPECIAL FIBER
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