Method for preparing PAN (polyacrylonitrile) fiber

A technology of polyacrylonitrile fiber and polyacrylonitrile, which is applied in the field of polymer materials and polyacrylonitrile fiber materials, and can solve the problems of scattered fiber bundles and low fiber strength

Inactive Publication Date: 2016-09-21
高海燕
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  • Abstract
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  • Application Information

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Problems solved by technology

However, many polyacrylonitrile fibers prepared at present are not

Method used

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Embodiment Construction

[0013] In order to enable those skilled in the art to better understand the solution of the present invention, the content of the present invention will be further introduced in conjunction with specific embodiments, but it should be noted that the following specific embodiments are only for understanding the technology, and do not constitute rights. limit.

[0014] A method for preparing polyacrylonitrile fibers, the method mainly includes the following steps: synthesizing spinning dope, the first step being the synthesis of polyacrylonitrile spinning dope. In this scheme, acrylonitrile AN is used as a monomer, and the universal organic solvent DMSO is used as a solvent, and solution polymerization is used to generate polyacrylonitrile PAN stock solution. The second step is the preparation of polyacrylonitrile precursors, the so-called spinning process. This plan adopts a one-step method to prepare PAN precursor by wet spinning process. The main steps include measuring and f...

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Abstract

The invention discloses a method for preparing PAN (polyacrylonitrile) fiber. The method comprises the following steps of synthesizing a spinning solution by means of taking AN (acrylonitrile) as monomer and DMSO (dimethyl sulfoxide) as solvent, and performing polymerization reaction on the AN and the DMSO so as to generate a PAN solution; preparing PAN precursors by utilization of a wet spinning technology, squeezing PAN slurry through a spinneret plate after metering and filtering, solidifying in an organic solution DMSO to form tows, washing the tows in a clear water bath with a temperature of 40 to 60 DEG C, then drawing the tows in steam with a temperature of 110 to 130 DEG C at a whole drawing ratio of 1.5 to 2.0, then drying and oiling, and then loosening and sizing according to a drawing ratio of 0.8 to 0.9, and finally rolling manually for later use. The PAN fiber prepared according to the method disclosed by the invention has the advantages that the PAN fiber not only has a good bunching property, is not liable to disperse, but also has higher strength and better softness.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to the field of polyacrylonitrile fiber materials. Background technique [0002] The performance of polyacrylonitrile fiber is very similar to that of wool, with good elasticity. When it is stretched by 20%, the rebound rate can still maintain 65%. It is fluffy, curly and soft, and its warmth retention is 15% higher than that of wool. The strength is 22.1~48.5cN / tex, which is 1~2.5 times higher than that of wool. Excellent light fastness, one year of exposure in the open air, the strength will only decrease by 20%, and can be made into curtains, curtains, tarpaulins, cannon coats, etc. It is resistant to acids, oxidants and general organic solvents, but has poor alkali resistance. The fiber softening temperature is 190-230°C. [0003] Acrylic fiber is known as artificial wool. It is soft, bulky, easy to dye, bright in color, light fast, antibacterial, and can be purely spun or b...

Claims

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Application Information

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IPC IPC(8): D01F6/18D01F6/38
CPCD01F6/18D01F6/38
Inventor 高海燕
Owner 高海燕
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