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Polyacrylonitrile-chitin composite fiber and its production process

A polyacrylonitrile and composite fiber technology, applied in the direction of conjugated synthetic polymer artificial filament, fiber treatment, fiber chemical characteristics, etc., can solve the problems of poor hydrophilicity, easy electrostatic human affinity, limitations, etc., to achieve Effect of increasing antistatic property and improving human affinity

Inactive Publication Date: 2008-08-13
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polyacrylonitrile also has many disadvantages: poor hydrophilicity, easy to charge static electricity in dry weather, poor human affinity, and poor antibacterial performance
Among chitin and its derivatives, chitin has the lowest cost, but chitin has poor compatibility with some conventional fiber-forming polymers, especially chitin is difficult to melt and insoluble in water, dilute acid, dilute Alkali, concentrated alkali and general organic solvents, so the application in chemical fiber modification is limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A polyacrylonitrile-chitin composite fiber, the composite fiber is composed of chitin and polyacrylonitrile, the chitin accounts for 1% of the solid content of the composite fiber, and the polyacrylonitrile accounts for 99% of the solid content of the fiber.

[0026] Dissolve polyacrylonitrile and chitin powder with a viscosity average molecular weight of 90000 in 51.3% sodium thiocyanate aqueous solution to make a spinning solution with a concentration of 11%. The weight ratio of polyacrylonitrile to chitin is 100:1. After stirring evenly, let it stand for 12 hours to defoam.

[0027] The spinning solution enters the spinning hole through the metering pump and is sprayed out. Enter the first coagulation bath, the content of sodium thiocyanate in the coagulation bath is 9%, and the temperature is 10 ℃. Then enter the second coagulation bath for pre-stretching. The coagulation bath is 3% sodium thiocyanate aqueous solution, and the bath temperature is 50° C. and the str...

Embodiment 2

[0029] A polyacrylonitrile-chitin composite fiber, the composite fiber is composed of chitin and polyacrylonitrile, the chitin accounts for 10% of the solid content of the composite fiber, and the polyacrylonitrile accounts for 90% of the solid content of the fiber.

[0030] The polyacrylonitrile that the viscosity-average molecular weight is 120000 is dissolved in the zinc chloride aqueous solution of 65% by weight, makes the spinning solution that concentration is 12%, then mixes with the chitin superfine powder of 500nm in the ratio of 9:1, After stirring evenly, let it stand for 12 hours to defoam.

[0031] The spinning solution enters the spinning hole through the metering pump and is sprayed out. Enter the first coagulation bath, the content of calcium chloride in the coagulation bath is 12%, and the temperature is 30 ℃. Then go through the second coagulation bath for pre-stretching. The coagulation bath is a 4% aqueous solution of sodium calcium chloride solution, the ...

Embodiment 3

[0033] A polyacrylonitrile-chitin composite fiber, characterized in that: the composite fiber is composed of chitin and polyacrylonitrile, chitin accounts for 20% of the solid content of the composite fiber, and polyacrylonitrile accounts for 80% of the solid content of the fiber .

[0034] Dissolve polyacrylonitrile in dimethyl sulfoxide to prepare a spinning solution with a concentration of 25%, and then mix it with 700nm chitin ultrafine powder at a ratio of 8:2, stir evenly, and let it stand for 12 hours for degassing.

[0035] The spinning solution enters the spinning hole through the metering pump and is sprayed out. Enter the first coagulation bath, the content of dimethyl sulfoxide in the coagulation bath is 20%, and the temperature is 20°C. Pre-stretching is carried out through the second coagulation bath, the coagulation bath is 9% dimethyl sulfoxide, the temperature is 50° C., and the stretching ratio is 3 times. After steam stretching, the stretching temperature ...

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Abstract

The invention relates to a polyacrylonitrile-chitin composite fiber and a manufacturing method of the same, the composite fiber includes a chitin and a polyacrylonitrile, the solid content of chitin is 1-20%, the solid content of polyacrylonitrile is 80-90%; the manufacturing method includes: 1) the 3-45% PAN solution is solvated in the solution; 2) the chitin which addition is 1-20% of polyacrylonitrile dried weight is added to polyacrylonitrile forming the polyacrylonitrile-chitin spinning solution to standing and deairing; 3) the spinning solution is spun from the spinneret holes, after stretching, washing, drying and other common procedure forming conventional processes finished product. The invention can improve the human affinity to PAN fiber, improve the anti-bacterial and antipruritic fiber effects to fiber, and increase the antistatic property to PAN fiber.

Description

technical field [0001] The invention belongs to the field of composite materials and its manufacturing method, in particular to a polyacrylonitrile-chitin composite fiber and its manufacturing method. Background technique [0002] Polyacrylonitrile fiber, commonly known as acrylic fiber, is a synthetic fiber with excellent warmth retention, excellent dyeability, and no moth and mildew. After dyeing, it can obtain brighter colors than wool. Polyacrylonitrile is widely used It is used to make wool-like products, so polyacrylonitrile is also called artificial wool. However, polyacrylonitrile also has many disadvantages: poor hydrophilicity, easy to charge static electricity in dry weather, poor human affinity, and poor antibacterial performance. [0003] In order to improve the performance of these shortcomings of polyacrylonitrile, researchers have done a lot of work on modified polyacrylonitrile, such as silk grafted polyacrylonitrile, milk protein grafted polyacrylonitrile ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/08D01F8/18D01D5/00D01D10/06D02J1/22
Inventor 沈新元郯志清杨庆吉亚丽
Owner DONGHUA UNIV
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