为了解决聚酰亚胺膜易塑化且渗透性低的问题，利用单体设计和共聚的方法制备了大体积侧基型聚酰亚胺膜[6FDA-BAPM/DABA，n（BAPM）∶n（DABA）为3∶1]，并测试了其对CO₂/CH₄等多种气体体系的分离性能。结果表明，所制备的膜具有良好的性能和抗塑化作用。在此基础上通过掺入中空多孔碳纳米球的方法制备了混合基质膜，以获得同时具有高选择性和高渗透性的气体分离膜。结果表明，掺入0.7%填料的膜具有最优性能，CO₂渗透系数达到122.85 Barrer，CO₂/CH₄选择性为63.84。

In order to solve the problems of PI membrane,such as easy plasticization and low permeability,a novel polyimide membrane with bulky pendant (6FDA-BAPM/DABA) is prepared via monomer design and copolymerization,and its separation performances for CO₂/CH₄ and other gas systems are tested.The results show that the prepared membrane presents good performance and anti-plasticization ability.On this basis,a mixed matrix membrane (MMM) is prepared by adding hollow porous carbon nanospheres in order to obtain high selectivity and permeability simultaneously.It is indicated that MMM containing 0.7 wt.% filler has the best performance,its permeability for CO₂ reaches 122.85 Barrer and can give a 63.84 of selectivity for CO₂/CH₄.

代岩(1983-),男,博士,高级工程师,研究方向为CO₂的膜法捕集,daiyan@dlut.edu.cn