Assembling ionic liquid into porous molecular filler of mixed matrix membrane to trigger high gas permeability,selectivity,and stability for CO_(2)/CH_(4) separation  

作　　者：Liting Yu Liqin Hao Yang Feng Jia Pang Mengwei Guo Liangjun Li Weidong Fan Lili Fan Rongming Wang Zixi Kang Daofeng Sun 

机构地区：[1]School of Materials Science and Engineering,State Key Laboratory of Heavy Oil Processing,China University of Petroleum(East China),Qingdao 266580,China [2]College of Chemistry,Nankai University,Tianjin 300071,China [3]College of Chemistry and Chemical Engineering,China University of Petroleum(East China),Qingdao 266580,China [4]College of New Energy,China University of Petroleum(East China),Qingdao 266580,China

出　　处：《Nano Research》2024年第5期4535-4543,共9页纳米研究（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.21875285,22171288,22005340);the Key Research and Development Projects of Shandong Province(No.2019JZZY010331);the Natural Science Foundation of Shandong Province(Nos.ZR2020MB017,ZR2022MB009);the Fundamental Research Funds for the Central Universities(No.23CX07004A);the Outstanding Youth Science Fund Projects of Shandong Province(Nos.2022HWYQ-070,ZR2022YQ15).

摘　　要：As an emerging zero-dimensional nano crystalline porous material,porous organic cages(POCs)with soluble properties in organic solvents,are promising candidates as molecular fillers in mixed matrix membranes(MMMs).The pore structure of POCs should be adjusted to trigger efficient gas separation performance,and the interaction between filler and matrix should be optimized.In this work,ionic liquid(IL)was introduced into the molecular fillers of CC3,to construct the IL@CC3/PIM-1 membrane to effectively separate CO_(2) from CH_(4).The advantages of doping IL include:(1)narrowing the cavity size of POCs from 4.4 to 3.9Åto enhance the diffusion selectivity,(2)strengthening the CO_(2) solubility to heighten the gas permeability,and(3)improving the compatibility between filler and matrix to upgrade membrane stability.After the optimization of the membrane composite,the IL@CC3/PIM-1-10%membrane possesses the CO_(2) permeability of 7868 Barrer and the CO_(2)/CH_(4) selectivity of 73.4,which compared to the CC3/PIM-1-10%membrane,improved by 15.9%and 106.2%,respectively.Furthermore,the membrane has maintained a stable separation performance at varied temperatures and pressures during the long-term test.The proposed method offers an efficient way to improve the performance of POCs-based MMMs in gas separation.

关 键 词：porous organic cage mixed matrix membrane ionic liquid gas separation 

分 类 号：TQ051.8[化学工程]