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

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.