Preparation method for chelating membrane for purifying wet electronic chemicals

A preparation method for a chelating membrane for purifying wet electronic chemicals, comprising 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, wherein the chelating resin is an iminodiacetic acid chelating resin;
• 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 specifically comprise:
• mixing the powder with the polyisobutylene and the polyhexafluoroethylene emulsion at 150-200° C. for 4-8 h, and carrying out vacuum defoaming for 3-6 h to form the membrane coating solution;
• and a mass ratio of the powder to the polyisobutylene to the polyhexafluoroethylene emulsion is (60-75):(5-10):(15-35);
• and
• coating the hydrophilic base membrane with the membrane coating solution to prepare a chelating membrane.