Preparation method of chitosan fiber

A chitosan fiber and chitosan technology, which is applied in fiber treatment, spinning solution preparation, fiber chemical characteristics, etc., can solve the problems of polluting the three wastes, difficult to recycle, easy to volatilize solvents, etc., and achieves easy operation and high performance. Stable, mild reaction conditions

Inactive Publication Date: 2009-10-07
QINGDAO UNIV OF SCI & TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] For the shortcoming that exists in the above-mentioned prior art method, the present invention proposes a kind of preparation method of chitosan fiber, this method overcomes solvent volatilization, difficult recovery, serious pollution and relatively large amount of waste treatment in the preparation of chitosan fiber

Method used

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  • Preparation method of chitosan fiber
  • Preparation method of chitosan fiber

Examples

Experimental program
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Embodiment 1

[0041] Chitosan raw material: 200CPS (when the concentration of glacial acetic acid is 1%), the degree of deacetylation is 90%, and the ash content is 0.3%.

[0042] Take 70g of 10% 1-acetoxy-3-methylimidazolium chloride ionic liquid aqueous solution, slowly add 2.10g of chitosan at normal temperature and pressure, and stir for 8-10 hours. After the chitosan is completely dissolved, filter twice with a 600-mesh filter cloth, and degas under reduced pressure to obtain a light yellow transparent chitosan spinning solution. Put the chitosan solution into the spinning kettle, extrude the chitosan solution at an extrusion speed of 0.03m / s, and then enter the coagulation bath with 3% sodium sulfate at a temperature of 50°C, and enter at a temperature of 70°C. ℃ stretching bath, and finally dried at a certain temperature to obtain white chitosan fibers.

Embodiment 2

[0044] Chitosan raw material: 500CPS (when the concentration of glacial acetic acid is 1%), the degree of deacetylation is 86%, and the ash content is 0.4%.

[0045] Take 80 g of 2% N-acetic acid pyridinium chloride ionic liquid aqueous solution, slowly add 1.60 g of chitosan at normal temperature and pressure, and stir for 10 to 12 hours. After the chitosan is completely dissolved, filter twice with a 600-mesh filter cloth, and degas under reduced pressure to obtain a light yellow transparent chitosan spinning solution. The chitosan solution is transferred into the spinning kettle, and the chitosan solution is extruded at an extrusion speed of 0.5m / s, and then enters into a 50% N-acetic acid pyridinium chloride ionic liquid aqueous solution at a temperature of coagulation bath at 60°C, washed in a stretching bath at a temperature of 70°C, and finally dried at a certain temperature to obtain white chitosan fibers.

Embodiment 3

[0047] Chitosan raw material: 300CPS (when the concentration of glacial acetic acid is 1%), the degree of deacetylation is 90%, and the ash content is 0.4%.

[0048]Take 70 g of 15% N-butyric acid pyrrole chloride ionic liquid aqueous solution, slowly add 2.55 g of chitosan at normal temperature and pressure, and stir for 10 to 12 hours. After the chitosan is completely dissolved, filter twice with an 800-mesh filter cloth, and degas under reduced pressure to obtain a light yellow transparent chitosan spinning solution. The chitosan solution is transferred into the spinning kettle, and the chitosan solution is extruded at an extrusion speed of 0.02m / s, and then enters the solution filled with 50% N-butyric acid pyrrole chloride ionic liquid aqueous solution, temperature It is a coagulation bath at 60°C, washed in a stretching bath at a temperature of 70°C, and finally dried at a certain temperature to obtain white chitosan fibers.

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Abstract

The invention relates to a preparation method of chitosan fiber, which conquers the defects of highly volatile of solvent, difficult recovery, serious pollution and large treatment amount of three-wastes in preparing the chitosan fiber. 0.5-20% mass% of ion liquid aqueous solution is used as solvent and the quantitative chitosan powder is slowly added into the solvent at normal temperature and pressure, the mixture is stirred up for 2-48h to make the chitosan completely dissolve and then subjected to twice extrusion and filter through a filter cloth of 400-800 mesh and deaeration using a high-speed centrifuge or decompression, finally the 3-7.5% of homogeneous transparent chitosan spinning fluid with moderate viscosity. The spinning machine is used for simulating the spinning and the extruded thread processed by the coagulating bath, the draw bath, water washing and drying, finally the chitosan fiber is obtained.

Description

technical field [0001] The invention belongs to the technical field of preparation of fiber materials, and in particular relates to a preparation method of chitosan fibers. Background technique [0002] Chitosan fiber is made of chitosan as the main raw material, using an appropriate solvent to directly dissolve chitosan, prepare a suitable spinning solution, and prepare a polymer with certain mechanical strength through spinning, coagulation, stretching and other processes. Functional fiber materials have excellent properties such as non-toxic, degradable, antibacterial, anti-mildew, deodorant and moisturizing, and are widely used in textiles, medical materials and other fields. Their preparation technology is a research hotspot and frontier in the field of new material technology today. At present, in the industrialization of chitosan fiber, most of them use dilute acetic acid or dilute hydrochloric acid as a solvent to dissolve chitosan to make spinning solution. Chinese...

Claims

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Application Information

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IPC IPC(8): D01D1/02D01D1/10D01D5/06D01D10/06D01D4/02D01F2/00
Inventor 于世涛刘福胜李露解从霞梁升纪欢欢
Owner QINGDAO UNIV OF SCI & TECH
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