非对称结构的CO2分离膜成膜过程的研究

采用干／湿相转化法制备了一系列非对称结构的气体分离膜。动态监测成膜过程的不同阶段，用傅立叶变换红外光谱仪来研究干相转化的蒸发过程，采用数码相机连续照相的方法，用光学显微镜来研究湿相转化的凝胶过程，并探讨成膜动力学过程对膜的最终结构及性能的影响。结果表明，对流蒸发和凝胶过程溶剂／非溶剂的交换速率对形成非对称结构的高渗透性能气体分离膜有着重要的影响。

Study on the Formation Process of Asymmetric CO2 Separation Membrane

A series asymmetric poly (ether sulfone) gas separation membranes were prepared by dry/wet phase inversion processes. The membrane formation processes include two main processes, the evaporation process was dynamically monitored with FTIR-ATR and the immersion process was dynamically photoed with optical microscope. The kinetic effect of the dry/wet phase inversion process on the morphology has been studied. It is concluded that two factors (convection evaporation and solvent/nonsolvent exchange rate) are important in controlling membrane morphology for gas separation.