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Preparation method of producing high-strength chitosan fiber by use of double-screw pump

A chitosan fiber, twin-screw pump technology, applied in fiber processing, spinning solution preparation, fiber chemical characteristics, etc., can solve the problems of no mention of dissolution time, no clear proposal, and difficulty in defoaming, and achieve easy deaeration. foam, save energy, reduce the effect of dripping

Active Publication Date: 2013-01-02
TIANJIN ZHONGSHENG BIO ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In these inventions, all relate to spinning solution dissolving, filtering, defoaming process, but all do not clearly propose to prepare the high concentration, high viscosity chitosan solution that is suitable for textile chitosan fiber clearly, also do not mention Solutions to difficult problems such as long dissolution time, difficult filtration, and difficult degassing encountered in the preparation of this solution

Method used

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  • Preparation method of producing high-strength chitosan fiber by use of double-screw pump

Examples

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Effect test

Embodiment 1

[0020] Take 600KG deionized water into the reaction kettle, start stirring, put in 20KG chitosan raw material, 12KG glacial acetic acid, 7KG urea, 5KG glycerin, 7KG defoamer in turn, stir at 20°C for 15 minutes, close the filter valve, and open the circulation valve , start the screw pump and run it for 1 hour to obtain evenly dissolved chitosan spinning solution; open the filter valve, close the circulation valve, use the screw pump to pressurize and filter, the filtrate directly enters the vacuum degassing tank, and the pump outlet pressure is controlled at 5MPa Below, the filter is made of stainless steel 600 mesh, the vacuum degree of the vacuum tank is 95%, and the static defoaming time is 2 hours; An aqueous solution of sodium hydroxide and ethanol, the content of sodium hydroxide is 4%, the content of ethanol is 5%, the temperature of the coagulation bath is 20°C, the stretching ratio of the fiber is 1.5, after stretching, deionization is carried out at room temperature ...

Embodiment 2

[0022] Take 300KG deionized water into the reactor, start stirring, put in 20KG chitosan raw material, 12KG glacial acetic acid, 7KG urea, 2KG ethanol, 7KG defoamer in turn, stir at 10°C for 15 minutes, close the filter valve, open the circulation valve, start The screw pump runs for 0.5 hours to obtain evenly dissolved chitosan spinning solution; open the filter valve, close the circulation valve, and use the screw pump to pressurize and filter, the filtrate directly enters the vacuum degassing tank, and the pump outlet pressure is controlled below 5MPa. The filter is made of stainless steel 800 mesh, the vacuum degree of the vacuum tank is 95%, and the static defoaming time is 1 hour; the degassed slurry is pumped to the spinneret with metering pump, the spinneret aperture is 0.04mm, 4000 holes, and the coagulation bath is hydrogen oxidation An aqueous solution of sodium and ethanol, the content of sodium hydroxide is 5%, the content of ethanol is 5%, the temperature of the c...

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Abstract

The invention relates to a preparation method of chitosan fibers, overcomes the shortcomings, such as low solution concentration, long dissolving time, difficult filtering, long defoaming time, instable product quality and low fiber strength, of the chitosan fiber preparation process at present, and adopts 2-5% glacial acetic acid as solvent, where a chitosan tablet raw material is added at a room temperature and stirred for 15-30 min. A double-screw pump is adopted for cyclic delivery for 1 hr, to fully dissolve the preparation, and also used to press-filter the solution and feed it into a vacuum tank for deforming for 2-4 hr to obtain 0.5-30% homogenous-phase transparent chitosan spinning fluid. A spinning machine is adopted for spinning, the yarn extruded by a metering pump enters a condensation bath, and high-strength chitosan fibers are obtained by drawing, water washing, alcohol washing and drying.

Description

technical field [0001] The invention belongs to the technical field of preparation of biological fiber materials, and in particular relates to a preparation method of chitosan fibers, in particular to a preparation method of high-strength chitosan fibers for textile production by twin-screw pumps. Background technique [0002] Chitosan fiber is made of chitosan powder or flocculent tablet as the main raw material, using appropriate solvent to prepare suitable spinning solution, and then it is produced through spinning, coagulation, stretching and other processes. Because of its obvious physiological health care and antibacterial effects, it has attracted attention in the high-end functional textile market in recent years. Some domestic universities, research institutes and related companies have done a lot of research and development and pilot tests, and achieved many results. Its preparation Technology is the research hotspot and frontier in the field of new material techno...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/00D01D1/02D01D1/10
Inventor 周新民
Owner TIANJIN ZHONGSHENG BIO ENG CO LTD
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