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迄今为止,用于气体分离的高分子膜,其气体透过速率和选择分离系数仍不够高。究其原因,一是膜材料的气体透过系数较低;二是某些气体透过系数较高的高分子材料又难以形成超薄膜层。
Hitherto, polymer membranes for gas separation have not been sufficiently high in gas permeation rate and selective separation factor. The reason, one is the membrane gas permeability coefficient is low; the second is that some of the gas through the higher polymer material and difficult to form an ultra-thin film.