Preparation method of cellulose-based ion exchange fiber

Abstract

The invention discloses a preparation method of cellulose-based ion exchange fiber, which comprises the following steps: (1) dipping dried cellulose fiber dried with constant weight into acidic potassium permanganate solution, stirring the mixture, washing the cellulose fiber with water, and removing moisture to obtain cellulose fiber carried with MnO2; (2) putting the cellulose fiber carried with the MnO2 in acrylamide solution, adding a reducing agent, carrying out graft copolymerization in thermostatic shaking water bath for 3-5h, washing the obtained reaction product with water, removing the residual manganese ions after copolymerization, washing the reaction product with water again, and drying the reaction product until being in a constant weight state to obtain a graft polymer; and(3) adding the graft polymer to mixed solution of NaOH and NaClO, carrying out degradation reaction in the thermostatic shaking water bath for 0.5-2h, performing acid-washing on the graft polymer to remove the residual chlorine after reaction, washing the obtained graft polymer with water and drying the washed graft polymer until being in a constant weight state to obtain the cellulose-based ion exchange fiber.

Description

technical field

[0001] The invention relates to the technical field of ion exchange fibers, in particular to a preparation method of cellulose-based ion exchange fibers. Background technique

[0002] Ion exchange fiber is a fibrous ion exchange adsorption material, which is composed of many monofilaments with uniform thickness, and the diameter ranges from 20 to 300um. The structure of the ion exchange fiber is composed of two parts: the matrix fiber and the exchange group connected to it. Among them, the matrix fibers include polyvinyl alcohol, polypropylene nitrile, polyvinyl chloride-acrylonitrile copolymer, polyphenolic, polyamide, polyolefin, etc., and the exchange groups include strong acid, weak acid, strong base, weak base, amphoteric groups, etc. .

[0003] The preparation of ion exchange fibers began in the 1940s. Anion and cation exchange fibers containing phosphoric acid groups and amine groups were first prepared. Since the 1970s, the former Soviet Union, the...