【摘要】 以草酸为非溶剂的PES/DMA/PVP铸膜液体系制备聚醚砜微孔膜 .考察了草酸含量及其中结晶水对膜孔径大小的影响 ,并研究了体系中草酸含量与铸膜液凝胶速度之间的关系和由此对膜形态结构的影响 ,比较其它有机酸———柠檬酸、丙酸和乙酸对膜的致孔能力大小 ;在制膜工艺方面 ,观察了空气中暴露时间 ,吹风强度对膜性能的影响 .在相对湿度 85 %左右 ,控制适当的暴露时间 ,即可制得膜性能良好 ,孔径范围为 0 .2～ 0 .65 μm的微孔膜 .最后用傅里叶红外光谱 (FTIR)分析了草酸在溶剂DMA中的溶解状态 ,并对两者之间的作用和由此对相转化过程与膜结构的影响作了简要分析更多还原

【Abstract】 Polyethersulfone microfiltration membranes can be produced from PES/DMA/PVP/OA systems by dry/wet phase inversion process. In such casting solution, some factors influencing pore size of microfiltration membrane are discussed including the concentration of OA, crystal water in OA, exposed time in the air and the flowing rate of the air. By optimizing operating condition PES mirofillitration membrane with average pore size of 0.2-0.65μm can be produced. Finally FTIR is used to detect the interaction between DMA and OA. The FTIR figure shows that hydrogen bond may be happened, and the hydrogen bong changes the structure of casting solution to affect the membrane morphology and properties.更多还原