管状复合炭膜的制备及其气体渗透性能  

Preparation and gas permeation property of the tubular composite carbon membrane

作　　者：田亮[1] 李琳[1] 王维[1] 徐瑞松[1] 洪周[2] 顾学红[2] 王同华[1] TIAN Liang;LI Lin;WANG Wei;XU Ruisong;HONG Zhou;GU Xuehong;WANG Tonghua(Dalian Key Laboratory of Membrane Materials and Membrane Process,School of Chemical Engineering,Dalian University of Technology,Dalian 116024,China;State Key Laboratory of Materials Chemical Engineering,School of Chemistry and Chemical Engineering,Nanjing University of Technology,Nanjing 211800,China)

机构地区：[1]大连理工大学化工学院大连市膜材料与膜过程重点实验室,大连116024 [2]南京工业大学化学化工学院材料化学工程国家重点实验室,南京211800

出　　处：《膜科学与技术》2023年第1期13-20,共8页Membrane Science and Technology

基　　金：国家重点研发计划项目(2021YFB3801200);国家自然科学基金项目(21878033,21978034,22178044);中央高校基本科研业务费项目(DUT2021TB03);辽宁省“兴辽英才计划”项目(XLYC1908033);大连市支持高层次人才创新创业项目计划项目(2019RT10)。

摘　　要：以中空纤维陶瓷膜为载体,聚芳醚酮为聚合物前驱体,采用浸涂-相转化结合的方法制备复合炭膜,探讨了制膜工艺对复合炭膜结构及性能的影响.结果发现,铸膜液浓度和提拉速率对膜的完整性影响较大,在15%质量分数铸膜液和2 cm/min提拉速率的条件下,可制备出表面膜层完整均一且兼具较高气体渗透通量的复合炭膜;通过控制制备前驱体膜过程中蒸发温度和蒸发时间,复合炭膜分离层缺陷大幅减少,气体分离选择性得到了显著提升.以15%铸膜液和2 cm/min提拉速率,在60℃蒸发温度及10 s蒸发时间的制膜工艺条件下制备出的复合炭膜,其O_(2)/N_(2)、CO_(2)/N_(2)和CO_(2)/CH_(4)选择性分别为5.62、26.27、25.10,O_(2)、CO_(2)渗透通量分别可达252、1177 GPU.Using hollow fiber ceramic membrane as carrier and poly(aryl ether ketone) as polymer precursor, composite carbon membrane was prepared by combination of dip coating and phase transformation. The effects of preparation parameters on structure and performance of composite carbon membranes were investigated. The results showed that the concentration of casting solution and the pulling rate had a great influence on the integrity of the membrane. Under the conditions of 15% concentration of casting solution and 2 cm/min pulling rate, the composite carbon membrane with complete and uniform surface membrane layer and high gas permeation rate could be prepared. By controlling the evaporation temperature and time in the precursor membrane preparation process, the defects of the composite carbon membrane separation layer were greatly reduced and the gas separation selectivity was significantly improved. The selectivity of O_(2)/N_(2), CO_(2)/N_(2)and CO_(2)/CH_(4) of the composite carbon membrane prepared under the evaporation time of 10 s and evaporation temperature of 60 ℃ were 5.62, 26.27 and 25.10 respectively, and the permeation rates of O_(2)and CO_(2)were 252 and 1 177 GPU respectively.

关 键 词：复合炭膜 气体分离 浸涂法 相转化法 

分 类 号：TQ028.8[化学工程]