title: Effective enhancement of gas separation performance in mixed matrix membranes using core/shell structured multi-walled carbon nanotube/graphene oxide nanoribbons.
abstract: Novel core/shell structured multi-walled carbon nanotube/graphene oxide nanoribbons (MWCNT@GONRs) nanohybrids were successfully prepared using a modified chemical longitudinal unzipping method. Subsequently, the MWCNT@GONRs nanohybrids were used as fillers to enhance the gas separation performance of polyimide based mixed matrix membranes (MMMs). It is found that MMMs concurrently exhibited higher gas selectivity and higher gas permeability compared to pristine polyimide. The high gas selectivity could be attributed to the GONRs shell, which provided a selective barrier and large gas adsorbed area, while the high gas permeability resulted from the hollow structured MWCNTs core with smooth internal surface, which acted as a rapid transport channel. MWCNT@GONRs could be promising candidates to improve gas separation performance of MMMs due to the unique microstructures, ease of synthesis and low filling loading.
authors.affiliation: State Key Laboratory of Heavy Oil Processing, China University of Petroleum, People's Republic of China. College of Science, China University of Petroleum, People's Republic of China.
authors.forename: Qingzhong
authors.initials: Q
authors.lastname: Xue
authors.forename: Xinglong
authors.initials: X
authors.lastname: Pan
authors.forename: Xiaofang
authors.initials: X
authors.lastname: Li
authors.forename: Jianqiang
authors.initials: J
authors.lastname: Zhang
authors.forename: Qikai
authors.initials: Q
authors.lastname: Guo