Preparation method for chelating membrane for purifying wet electronic chemicals

Abstract

Disclosed in the present disclosure is a preparation method for a chelating membrane for purifying wet electronic chemicals, including the following steps: performing hydrophilic treatment on a porous PTFE membrane to obtain a hydrophilic base membrane; sequentially cleaning a chelating resin with a hydrochloric acid solution, a sodium hydroxide solution and deionized water, and then drying; grinding and sieving the cleaned and dried chelating resin to obtain a powder; mixing the powder with polyisobutylene and a polyhexafluoroethylene emulsion, and performing vacuum defoaming to form a membrane coating solution; coating the hydrophilic base membrane with the membrane coating solution to prepare a chelating membrane; and sequentially washing the chelating membrane with a hydrochloric acid solution, a sodium hydroxide solution and pure water until the chelating membrane is neutral, and then drying and storing the chelating membrane.