Wet spinning method for polyacryl-nitrile fibre
A polyacrylonitrile fiber, wet spinning technology, applied in the direction of wet spinning, fiber chemical characteristics, single-component synthetic polymer rayon, etc., can solve the problem of high corrosion resistance of production equipment, high cost, and production environment air pollution etc.
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Examples
Embodiment 1
[0023] The polyacrylonitrile resin is uniformly mixed with the ionic liquid to form a slurry, and the content of the polyacrylonitrile resin in the slurry is 23 wt%. Swell at a temperature of 40°C for 10 minutes, then heat up to 150°C and dissolve for 2 hours to form a uniform solution to make a spinning dope. The spinning stock solution is spun after filtering and defoaming, and the temperature of the stock solution is 150°C. The coagulation bath is an aqueous solution of ionic liquid, wherein the content of the ionic liquid is 20 wt%, and the temperature of the coagulation bath is 50°C.
[0024] The ionic liquid adopted has the following structural formula:
[0025]
[0026] The spinning speed is 6m / min, and the coagulated and formed fibers are processed by subsequent processes such as washing, stretching, drying and setting, crimping and cutting to obtain short polyacrylonitrile fibers with a specification of 2.5dtex×65mm. The measured breaking strength was 3.5 cN / dtex...
Embodiment 2
[0028] The polyacrylonitrile resin and the ionic liquid are uniformly mixed to form a slurry, and the content of the polyacrylonitrile resin in the slurry is 10 wt%. Swell at a temperature of 18°C for 55 minutes, then raise the temperature to 60°C and dissolve for 4.5 hours to form a uniform solution to make a spinning dope. The spinning stock solution is spun after filtering and defoaming, and the temperature of the stock solution is 100°C. The coagulation bath is an aqueous solution of ionic liquid, wherein the content of the ionic liquid is 20 wt%, and the temperature of the coagulation bath is 35°C.
[0029] The ionic liquid adopted has the following structural formula:
[0030]
[0031] The spinning speed is 9m / min, and the coagulated and formed fibers are processed by subsequent processes such as washing, stretching, drying and setting, crimping and cutting to obtain polyacrylonitrile staple fibers with a specification of 3.8dtex×75mm. The measured breaking streng...
Embodiment 3
[0033] The polyacrylonitrile resin is uniformly mixed with the ionic liquid to form a slurry, and the content of the polyacrylonitrile resin in the slurry is 12 wt%. Swell at a temperature of 20°C for 40 minutes, then raise the temperature to 100°C and dissolve for 3.5 hours to form a uniform solution to make a spinning dope. The spinning stock solution is spun after filtering and defoaming, and the temperature of the stock solution is 110°C. The coagulation bath is an aqueous solution of ionic liquid, wherein the content of the ionic liquid is 27wt%, and the temperature of the coagulation bath is 40°C.
[0034] The ionic liquid adopted has the following structural formula:
[0035]
[0036] The spinning speed is 6m / min, and the coagulated and formed fibers are processed by subsequent processes such as washing, stretching, drying and setting, crimping and cutting to obtain polyacrylonitrile staple fibers with a specification of 3.3dtex×65mm. The measured breaking strength...
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Abstract
Description
Claims
Application Information
- IPC
- D01D5/06; D01F6/18
- Inventors
- 林耀; 张玉梅