Production of cellulose/polyacrylonitrile homogeneous mixed solution

A polyacrylonitrile and mixed solution technology, applied in the direction of cellulose/protein conjugated artificial filaments, conjugated synthetic polymer artificial filaments, etc., can solve the complicated process parameters, strong corrosion of inorganic reagents, and endanger operators Health and other issues, to achieve the effect of increasing economic benefits, easy recycling, and avoiding phase separation

Inactive Publication Date: 2007-11-21
DONGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the production of cellulose fibers mainly uses sodium hydroxide, acetone, carbon disulfide, etc. as solvents and additives, and the cellulose used needs to be yellowed, aged and matured, involving formaldehyde, sulfite, sodium sulfate, sulfuric acid and zinc sulfate. Among them, the organic reagents are volatile, endangering the health of operators and causing serious pollution to the environment; while the inorganic reagents are highly corrosive, which greatly damages the equipment.
In addition, the recovery of these chemical reagents requires multi-stage decompression evaporation and multi-stage crystallization sedimentation. 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, further causing serious pollution to the environment.

Method used

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  • Production of cellulose/polyacrylonitrile homogeneous mixed solution
  • Production of cellulose/polyacrylonitrile homogeneous mixed solution
  • Production of cellulose/polyacrylonitrile homogeneous mixed solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Raw material: bamboo pulp, cellulose content 95%, polymerization degree 300;

[0030] Polyacrylonitrile with a viscosity average molecular weight of 5.0×10 4 , 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 second monomer is 18% by mass of methyl acrylate %, the content of the third monomer itaconic acid is 0.2%;

[0031] Ionic liquid, 1-butyl-3-methylimidazolium chloride.

[0032] Mix 1% dry bamboo pulp with 99% polyacrylonitrile evenly, then add this mixture into 1-butyl-3-methylimidazolium chloride, and dissolve it at 70°C for 2 hours to obtain a stable Uniform solution, the mass percent of 1-butyl-3-methylimidazolium chloride in the solution is 75%. Using water as coagulant, cellulose / polyacrylonitrile blend composite film or composite fiber can be prepared.

Embodiment 2

[0034] Raw material: wood pulp, cellulose content 96%, polymerization degree 500;

[0035] Polyacrylonitrile, viscosity average molecular weight 2.0×10 5 , is a copolymer comprising a first monomer and a second monomer, wherein the content of the first monomer is acrylonitrile is 90%, and the content of the second monomer methyl methacrylate is 10%.

[0036] Ionic liquid, 1-allyl-3-methylimidazolium chloride.

[0037] Mix 30% wood pulp with 70% polyacrylonitrile evenly, add this mixture to 1-allyl-3-methylimidazolium chloride and mix, swell at 45°C for 45min, dehydrate, and then Dissolve at 120°C for 1 hour to obtain a stable and uniform solution, the content of 1-allyl-3-methylimidazolium chloride in the solution is 90%. Using water as coagulant, cellulose / polyacrylonitrile blend composite film or composite fiber can be prepared.

Embodiment 3

[0039] Raw materials: cotton pulp, cellulose content 99%, polymerization degree 700; polyacrylonitrile, viscosity average molecular weight 2.0×10 4 , for acrylonitrile homopolymer.

[0040] Ionic liquid, 1-butyl-2-methylpyrazole bromide.

[0041]Add 10% dry cotton pulp into 1-butyl-2-methylpyrazole bromide, stir evenly, dissolve at 90°C for 1 hour to obtain solution ①, add 2% dry poly Add acrylonitrile to 1-butyl-2-methylpyrazole bromide, stir evenly, dissolve at 100°C for 1 hour to obtain solution ②, then mix the same amount of solution ①②, and stir at 100°C for 10 minutes to obtain a stable solution A homogeneous solution, the mass percent of 1-butyl-2-methylpyrazole bromide in the solution is 94%. Using water as coagulant, cellulose / polyacrylonitrile blend composite film or composite fiber can be prepared.

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Abstract

Production of cellulose/polyacrylonitrile homogeneous mixed solution is carried out by taking ionic liquid as solvent, dissolving cellulose and polyacrylonitrile into ionic liquid to obtain homogeneous mixed solution and taking waster as coagulating agent to obtain cellulose/polyacrylonitrile blended composite thin film or composite fiber. It's cheap and has no environmental pollution and can be recovered and used to produce excellent fiber or thin film.

Description

technical field [0001] The invention belongs to a preparation method of a homogeneous mixed solution, in particular to a preparation method of a cellulose / polyacrylonitrile homogeneous mixed solution. Background technique [0002] Cellulose fiber has soft hand feeling, good hygroscopicity and air permeability, comfortable to wear, good gloss, high dry strength, excellent dyeing performance and excellent performance of biodegradability, but it has poor wet fastness, less elasticity, fabric It is easy to wrinkle and not easy to recover, and has disadvantages such as poor acid resistance and alkali resistance. [0003] Polyacrylonitrile fiber has a wool-like feel and good bulkiness. It is known as "synthetic wool". It is a light fiber with good drape performance, good elasticity and resilience, and has excellent sunlight and weather resistance. , but its strength is average, it is a hydrophobic fiber (moisture regain 1%), and static electricity and pilling often occur. [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/09C08J5/18C08L33/20C08L1/02D01F8/08D01F8/02
Inventor 张玉梅王华平程凌燕李建武
Owner DONGHUA UNIV
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