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Coagulation bath for cellulose solution spinning and method for preparing fiber

A technology of cellulose solution and coagulation bath, applied to artificial filaments in cellulose solution, wet spinning method, stretch spinning method, etc., can solve the difficulty of recycling and reuse, difficult to separate, increase the difficulty of industrial production and production cost and other problems, to achieve the effect of good solidification effect, low cost and complete solidification.

Active Publication Date: 2017-08-25
CHINESE TEXTILE ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the coagulation system of sulfuric acid / sodium sulfate aqueous solution is highly corrosive, and sulfuric acid / sodium sulfate aqueous solution reacts with sodium hydroxide / urea trickle components to form a mixed aqueous solution of sodium sulfate and urea, which is difficult to separate and difficult to recycle, which indirectly increases industrialization. Difficulty and cost of production

Method used

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  • Coagulation bath for cellulose solution spinning and method for preparing fiber
  • Coagulation bath for cellulose solution spinning and method for preparing fiber

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Experimental program
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Effect test

Embodiment 1-25

[0044] Prepare the coagulation bath of the present invention according to the components and concentrations in Table 1-2.

[0045] Table 1

[0046]

[0047] Table 2

[0048]

Embodiment 26

[0050] Preparation method of regenerated cellulose fiber:

[0051] The cellulose is dissolved in the sodium hydroxide / urea / water system, and after vacuum degassing, the spinning stock solution is obtained, and the raw fiber is obtained through dry jet wet spinning or wet spinning.

[0052] The as-spun fiber is passed through the coagulation bath prepared in Example 1, the temperature of the coagulation bath is 15°C, and then it is stretched by 1 times of the nozzle, washed in the washing pool at 90°C, coated with silicone oil, dried with hot air at 120°C, and collected. Regenerated cellulose fibers are obtained. The prepared cellulose fibers are completely coagulated, free of strands, the fiber interface is round, the surface is smooth, the fibers are soft and shiny, and the strength is higher than 2.5cN / dtex. The used coagulation bath is used to prepare phosphate fertilizer by adjusting the pH value.

Embodiment 27

[0054] Preparation method of regenerated cellulose fiber:

[0055] The cellulose is dissolved in the sodium hydroxide / urea / water system, and after vacuum degassing, the spinning stock solution is obtained, and the raw fiber is obtained through dry jet wet spinning or wet spinning.

[0056] The as-spun fiber is passed through the coagulation bath prepared in Example 2, the temperature of the coagulation bath is 90°C, and then it is stretched 3 times by the nozzle, washed in a washing pool at 25°C, coated with silicone oil, dried with hot air at 180°C, and collected. Regenerated cellulose fibers are obtained. The prepared cellulose fibers are completely coagulated, free of strands, the fiber interface is round, the surface is smooth, the fibers are soft and shiny, and the strength is higher than 2.5cN / dtex. The used coagulation bath is used to prepare phosphate fertilizer by adjusting the pH value.

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Abstract

In particular, the present invention relates to a coagulation bath for cellulose solution spinning and a method for preparing cellulose fibers using the coagulation bath. The coagulation baths used in the alkali / urea / water system solvent method cellulose solution spinning can be one or more coagulation baths, and each coagulation bath is an aqueous solution containing phosphoric acid and / or phosphate. The coagulation bath provided by the invention is economical, environmentally friendly, and can be recycled and reused. The cellulose fiber prepared by using the coagulation bath is completely coagulated without parallel filaments, and the interface of the prepared fiber is round, the surface is smooth, the fiber is soft and shiny, and The strength is higher than 2.7cN / dtex, and the coagulation bath solution after use can be directly used as a liquid phosphate fertilizer or recycled into a solid phosphate fertilizer, which is conducive to the large-scale promotion and use of industrialization.

Description

technical field [0001] The invention belongs to the technical field of fiber manufacturing in the subject of organic polymer materials, and in particular relates to a coagulation bath for cellulose solution spinning and a method for preparing cellulose fibers using the coagulation bath. Background technique [0002] The low-temperature urea solvent system is a new type of solvent system for the preparation of regenerated cellulose fibers, which has the advantages of environmental protection, short production cycle, cheap and easy to obtain, and is the development direction of regenerated cellulose fibers in the future. However, there are some technical difficulties in the preparation of regenerated cellulose fibers by the low-temperature urea solvent system, such as increasing the dissolved solid content, prolonging the gelation time of the spinning dope, solving the mass transfer and heat dissipation of the equipment container, and the fine flow of the spinning dope. The co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D5/06D01F2/02D01D5/12
Inventor 李昭锐孙玉山骆强徐纪刚徐鸣风张均金云峰程春祖蔡剑张彩霞
Owner CHINESE TEXTILE ACAD