Preparation method of PPS (polyphenylene sulfide)-based N-methylimidazole strong base type ion exchange fiber

Abstract

The invention discloses a preparation method of a PPS (polyphenylene sulfide)-based N-methylimidazole strong base type ion exchange fiber. The method comprises the following steps of: firstly, on the basis of using polyphenylene sulfide fiber as a basic raw material, adding dichloroethane, chloromethyl ether and tin chloride for swelling, heating up for reaction after swelling, cooling after reaction, filtering out the product, and processing the product to get the chloromethylated polyphenylene sulfide fiber; then, adding dichloroethane for swelling, adding alcohol, N-methylimidazole and tetrabutylammonium bromide after swelling, heating up for reaction, filtering out the product after reaction, and sequentially washing, extracting, washing with brine and drying the product, thereby obtaining the product PPS -based N-methylimidazole strong base type ion exchange fiber. The PPS-based N-methylimidazole strong base type ion exchange fiber prepared according to the invention has the characteristics of high oxidation resistance, excellent chemical stability, larger adsorbing capacity, excellent absorption and regeneration performance and the like. The preparation method of the PPS -based N-methylimidazole strong base type ion exchange fiber is simple, low in production cost and easy to generalize in industry.

Description

technical field

[0001] The invention relates to a preparation method of a strong base ion exchange fiber, in particular to a preparation method of a PPS-based N-methylimidazole strong base ion exchange fiber. Background technique

[0002] The commercial strong basic ion exchange fiber mainly passes through 60 CO γ The copolymer of styrene and divinylbenzene is grafted on the fiber substrate by irradiation, and then prepared by two steps of chloromethylation and quaternization. The synthesis process is cumbersome and the cost is high. In addition, strong basic ion exchange fibers generally exist in the OH type. During the application process, the quaternary amine functional group undergoes irreversible Hofmann degradation and transforms into a tertiary amine, which will eventually cause the group to have no basicity. Therefore, strong alkali ion exchange fibers should not be used in alkaline conditions for a long time. Therefore, their further application in industry is l...

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