Polysilsesquioxane/polyetheretherketone composite membranes and methods for preparing the same

A method for preparing a polysilsesquioxane/polyetheretherketone composite membrane, comprising:

• obtaining a polysilsesquioxane polymeric sol by mixing an ethanol solvent and a polysilsesquioxane precursor, sequentially adding deionized water and hydrochloric acid after complete dissolution, followed by constant-temperature water bath stirring for performing a polymerization reaction;
• and
• obtaining the polysilsesquioxane/polyetheretherketone composite membrane by coating the polysilsesquioxane polymeric sol on a polyetheretherketone support on which an intermediate layer is formed by knife coating, wherein
• a molar ratio of the polysilsesquioxane precursor, the deionized water, and the hydrochloric acid is 1:(6-240):(0.2-1),
• a mass fraction of the polysilsesquioxane polymeric sol is 5 wt %-10 wt %;
• and
• the intermediate layer on the polyetheretherketone support is formed by a process including:
• subjecting an aqueous phase piperazine solution and an organic phase 1,3,5-benzenetricarbonyl chloride solution to an interfacial polymerization reaction on the polyetheretherketone support, or
• subjecting polydimethylsiloxane or amino silicone oil to an oxygen plasma modification on the polyetheretherketone support.