Abstract: The recent research progress in modification methods of polyimide pervaporation membranes was reviewed. Five methods were discussed including copolymerization (main chains and side groups), filling (inorganic and organic), crosslinking, blending, and surface modification. The mechanism of reaction, designing methods, and influence on separation performance and structure of polyimide pervaporation membranes were analyzed. The advantages and disadvantages of these modification methods were summarized by comparing different research results. Based on the above, the foresight developments of modification methods of polyimide pervaporation membranes were also illustrated.

Key words: modification, pervaporation membrane, separation, polyimide