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Production method of chitosan fiber

A technology of chitosan fiber and production method, applied in the field of spinning, to achieve the effects of low production cost, convenient mass production, great economic and social benefits

Pending Publication Date: 2019-04-05
QINGDAO JIFA GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In existing chitosan spinning patents, all can not break away from alcohols completely, therefore, be badly in need of a kind of safety high, fibrous chitosan at present

Method used

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  • Production method of chitosan fiber
  • Production method of chitosan fiber

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Experimental program
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Embodiment approach

[0035] The embodiment of the production method of a kind of chitosan fiber of the present invention, comprises following processing step:

[0036] (1) Preparation of spinning solution → (2) Filtration → (3) Degassing → (4) Metering by metering pump → (5) Spinning → (6) Coagulation in coagulation bath → (7) Drawing → (8) Washing → (9) oiling → (10) vacuum freeze drying → (11) curly cutting;

[0037] Among them, the specific process of the coagulation bath coagulation in the above step (6) is: the coagulant is 0.1%-5% w / w sodium hydroxide aqueous solution, 2%-8% w / w sodium sulfate, sodium bicarbonate, sodium carbonate Or one or several kinds of sodium phosphate; the spinning solution is extruded from the spinneret and enters the coagulation bath at 5-25°C, and is drawn while coagulating, and the draw ratio is 1-2 times.

[0038] Further, after step (9), carry out step (10) vacuum freeze-drying: the vacuum freeze-drying does not need to pretreat the fiber, the fiber is oiled, sq...

Embodiment 1

[0049] 1. Add deionized water into the stirring tank, control the water temperature at 20°C, add 3.5% flake chitosan raw material and stir for 1 hour, then add 1.8% acetic acid, continue stirring for 4 hours, and configure the shell polysaccharide spinning solution;

[0050] 2. The dissolved chitosan spinning solution is filtered through filters with pore sizes of 50 μm, 20 μm, and 10 μm in sequence, and then enters the spinning kettle, and is vacuumed and kept at -0.05 MPa until the defoaming is completed;

[0051] 3. Metered by a metering pump and squeezed into the coagulation bath. 4% NaOH, 2.5% NaHCO in the coagulation bath 3， The coagulation bath temperature is 10°C;

[0052] 4. Then draw, the draw ratio is 1.5 times, the first drawing bath is 15% Na at 30°C 2 SO 4 solution, the second stretching bath is deionized water at 50°C;

[0053] 5. Then, wash in deionized water at 25°C. After oiling and squeezing dehydration in the oil tank, vacuum freeze-drying is performed...

Embodiment 2

[0056] 1. Add deionized water into the stirred tank, control the water temperature at 22°C, add 4% chitosan raw material and stir for 1 hour, then add 2% acetic acid, continue stirring for 5 hours, and configure the shell polysaccharide spinning solution;

[0057] 2. The dissolved chitosan spinning solution is filtered through filters with a pore size of 60 μm, 30 μm, and 20 μm in sequence, and then enters the spinning kettle, and is vacuumed and kept at -0.06 MPa until the defoaming is completed;

[0058] 3. Extrude into the coagulation bath after metering by the metering pump. The coagulation bath contains 1.0% NaOH, 5% sodium sulfate, and 3.0% sodium phosphate. The temperature of the coagulation bath is 15°C;

[0059] 4. Then stretching, the stretching ratio is 1.8 times, the first stretching bath is 30°C, the concentration is 15% sodium chloride aqueous solution, and the second stretching bath is 10% sodium sulfate at 40°C;

[0060] 5. Then, wash in deionized water at 35°...

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Abstract

The invention provides a production method of chitosan fiber. The method is characterized by including the following steps of preparation of a spinning solution, filtration, defoaming, metering with ametering pump, spinning, coagulation in coagulation bath, drafting, water washing, oiling, vacuum freeze drying, coiling and cutting. During coagulation in coagulation bath, a coagulant is selected from one or more of 0.1-5% w / w of a sodium hydroxide aqueous solution and 2-8% w / w of sodium sulfate, sodium bicarbonate, sodium carbonate or sodium phosphate; the spinning solution enters coagulationbath of 5-25 DEG C after being extruded from a spinneret plate, coagulation and drafting are performed at the same time, and the drafting multiple is 1-2 times. In the whole wet spinning process of chitosan fiber, alcohol solvents are not used, the potential safety hazards caused by the use and storage of alcohol solvents can be completely eliminated, the cost of materials can be reduced, and thequality of the chitosan fiber can be improved. Moreover, continuous and uninterrupted production is achieved, the number of operators is reduced, and the production cost can be reduced.

Description

technical field [0001] The invention belongs to the technical field of spinning, in particular to a production method of chitosan fibers. Background technique [0002] Chitin is a natural polymer material second only to cellulose in reserves on the earth, and is widely found in the cell walls of arthropods, molluscs, annelids, protozoa, coelenterates, fungi and algae. Chitosan is an important derivative of chitin, which is obtained after deacetylation of chitin. Chitosan after deacetylation has a large amount of active -NH2, -OH, therefore, the chitosan fiber obtained by wet spinning is positively charged, and has good antibacterial, biocompatibility, and adsorption properties. The resulting textiles resist bacterial infection and prevent skin diseases, are also deodorant, wick moisture, and are comfortable to wear. As a medical dressing, it can stop bleeding, reduce pain, speed up healing, and promote the formation of new skin. It can be applied to hemostatic cotton, medi...

Claims

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Application Information

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IPC IPC(8): D01D1/02D01D5/06D01F9/00
CPCD01D1/02D01D5/06D01F9/00Y02P70/62
Inventor 王占锐徐红梅陈雪功王京斌衣宏君国平
Owner QINGDAO JIFA GROUP