关键词: N-乙烯基-γ-氨基丁酸钠-丙烯酸钠共聚物 (VSA-SA), CO₂, 复合膜, 固定载体

Abstract: A kind of new fixed carrier membrane material for CO₂ separation, N-vinyl-γ-sodium aminobutyrate-sodium acrylate copolymer(VSA-SA), was synthesized by radical copolymerization and hydrolysis. The composite membrane was developed with VSA-SA as an active layer and polysulfone (PS) ultra-filtration membrane as the support. Several kinds of metal ion cross-linkers were used to improve the performance of the composite membrane. The effects of cross-linking time on the cross-linked membrane were also studied. The membrane performance was investigated by using feed gases with different ratios of CO₂ to CH₄.The results showed that the composite membrane was more suitable for the separation and removal of the natural gas with high CH₄ content. The prepared membrane was stable during one week testing.

Key words: N-乙烯基-γ-氨基丁酸钠-丙烯酸钠共聚物 (VSA-SA), CO₂, 复合膜, 固定载体