中文摘要：

以3,3＇,4,4＇-二苯醚四甲酸二酐-4,4＇-二氨基苯醚型（ODPA-ODA）聚醚酰亚胺为前驱体,活性炭纤维（ACF）为掺杂剂,制备了ACF/C复合膜。分别通过热重分析、红外光谱、扫描电镜、X-射线衍射等表征手段分析了膜样品的热稳定性、表面官能团、表面形貌和微观结构。考察了ACF用量等因素对前驱体膜及炭膜的结构与性能影响。结果显示,引入ACF使前驱体热稳定性提高;随制备时ACF用量从0增大到0.5%,其对所得炭膜分别发挥了堵孔与造孔的双向调节作用,使气体渗透性先减小后增大。与无掺杂炭膜相比,当ACF用量为0.5%时所制备复合炭膜对H_2,CO_2,O_2和N_2的渗透性分别提高了1.5倍、18.6倍、5.3倍和5.8倍。

英文摘要：

The ACF / C composite carbon membranes were prepared by using 3, 3＇, 4, 4＇-oxydiphthalic dianhydride-4,4＇-oxydianiline（ ODPA-ODA） type polyetherimide as precursor,activated carbon fiber（ ACF） as additive. Thermogravimetric analysis,infrared spectroscopy,scanning electron microscope and X-ray diffraction were applied to characterize the thermal stability,surface functional groups,surface morphology and microstructure of membrane samples,respectively. The effects of ACF content on the structure and property of precursor and carbon membranes were investigated. The results show that the introduction of ACF leads to the improvement of thermal stability of precursors. The gas permeability first decreases then increases with increasing the amount of ACF in carbon membranes from 0 to 0. 5% during preparation,due to the dual-function of pore-blocking and poreforming in carbon membranes. When the ACF amount of 0. 5% is used,the gas permeabilities of as-obtained composite carbon membranes are increased by 1. 5 times for H2,18. 6 times for CO_2,5. 3 times for O_2 and 5. 8times for N_2,in comparison to the ones prepared without ACF.