以聚醚酰亚胺为膜材料,N-甲基吡咯烷酮为溶剂,采用干/温法纺丝技术制备聚醚酰亚胺中空纤维气体分离膜.研究了不同芯液组成和中空纤维热处理对O2/N2、H2/N2和He/N2膜性能的影响.当芯液组成为m(NMP):m(H2O)=19:1时,涂层的聚醚酰亚胺中空纤维膜气体分离性能如下:αO2/N2=4.22,αHe/N2=83.9,αH2/N2=165,JO2=3.25 GPU,JHe=64.6 GPU和JH2=127 GPU;该膜经过150 ℃热处理1 h后,其气体分离性能如下:αO2/N2=7.57,αHe/N2=304,αH2/N2=512,JO2=0.833 GPU,JHe=33.4 GPU和JH2=56.3 GPU.用扫描电镜对膜结构、中空纤维膜制备中的相转化过程进行了研究.讨论了聚醚酰亚胺中空纤维共混膜的机械性能.
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