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Anti-degradable solvent for dissolving cellulose and preparation method of spinning dope thereof

A technology for dissolving cellulose and spinning dope, which is applied in the production of artificial filaments made of viscose and bulk chemicals. low effect

Inactive Publication Date: 2010-02-24
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, the composite solvent requires a wide range of water content from 1% to 20%, which solves the problem of high water evaporation cost in the later stage of recovery, and the obtained spinning stock solution can be directly spun in the original process

Method used

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  • Anti-degradable solvent for dissolving cellulose and preparation method of spinning dope thereof
  • Anti-degradable solvent for dissolving cellulose and preparation method of spinning dope thereof
  • Anti-degradable solvent for dissolving cellulose and preparation method of spinning dope thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0018] Stir 10 g of BmimCl (1-butyl-3-methyl-imidazolium chloride) after vacuum drying in an oil bath at 90°C for 30 minutes. After the solution becomes transparent and clear, add cotton with a degree of polymerization of 500 after vacuum drying. 1g of staple fiber, continue to stir at 90°C for 7 hours to dissolve the cellulose, keep the whole process sealed, then filter, defoam, and finally obtain a light yellow spinning fiber with a concentration of 10%, a viscosity of 160Pa.s, and a degree of polymerization of 188 stock solution.

example 2

[0020] Stir 15g of EmimAc (1-ethyl-3-methyl-imidazole acetate) and 3g of pyridine in a 90°C oil bath for 30 minutes after vacuum drying, and after the solution becomes transparent and clear, add the degree of polymerization after vacuum drying 2g of 500 cotton linter short fibers, continue to stir at 90°C for 7h to dissolve the cellulose, keep the whole process sealed, then filter, defoam, and finally obtain a concentration of 10%, a viscosity of 220Pa·s, and a degree of polymerization of 240 Milky white spinning dope.

example 3

[0022] Stir 5g of BmimBr (1-butyl-3-methyl-imidazolium bromide) and 10g of DMSO after vacuum drying in an oil bath at 90°C for 30 minutes. 0.75g of short cotton linters, continue to stir at 90°C for 7h to dissolve the cellulose, keep the whole process sealed, filter, and defoam to finally obtain a milky white spinning fiber with a concentration of 5%, a viscosity of 330Pa.s, and a degree of polymerization of 380. Silk stock solution.

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Abstract

The invention relates to an anti-degradable solvent for dissolving cellulose and a preparation method of spinning dope thereof. The solvent dissolves the cellulose by adding an organic substance to the ionic liquid. The ionic liquid has excellent dissolvability to the cellulose, seriously degrades the regenerated cellulose and is hard to spin filament; the addition of the organic substance can obviously improve polymerization degree of cellulose, and reduce viscosity of the spinning solution. Simultaneously, the compound liquid formed by the ionic liquid and the organic substance has the characteristics of extremely low vapor pressure and high boiling point, and is beneficial to recovering and recycling the compound solvent. Compared with the traditional adhesion method, the method has thecharacteristics of no pollution, simple process, low cost, and the like.

Description

Technical field: [0001] The invention relates to the dissolution of a composite solvent of ionic liquid and organic matter, the preparation of regenerated cellulose and its spinning stock solution, and belongs to the field of cellulose regeneration. Background technique: [0002] Cellulose is the most abundant renewable resource in nature. Human beings have a long history of application and application technology. Its processed products are widely used in fiber, papermaking, film, coating, polymer, etc. Due to the continuous reduction of fossil fuel resources and the increase of greenhouse gas emissions, countries all over the world are paying more and more attention to environmental pollution in today's increasingly scarce resources. It is of far-reaching significance to make full use of abundant cellulose resources to develop the cellulose industry. Research on replacing fossil resources with renewable biomass resources has attracted increasing attention. Plant fiber raw ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/11D01F2/08
CPCY02P20/54
Inventor 李增喜刘振张锁江张香平郑勇王慧曾少娟吕兴梅
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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