Ultrapermeable membranes based on connected cluster of hollow polydimethylsiloxane nanoparticles for gas separation

作     者：Xiaoli Ding Fangfang Tan Hongyong Zhao Qingping Xin Yuzhong Zhang Xiaoli Ding;Fangfang Tan;Hongyong Zhao;Qingping Xin;Yuzhong Zhang

作者机构：State Key Laboratory of Separation Membranes and Membrane ProcessesNational Center for International Joint Research on Separation MembranesTiangong UniversityTianjin300387China Tianjin Key Laboratory of Hollow Fiber Membrane Materials and Processes(Tiangong University)Tianjin300387China 

出 版 物：《Particuology》 (颗粒学报(英文版))

年 卷 期：2023年第79卷第8期

页      面：45-53页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070305[理学-高分子化学与物理] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 

基　　金：supported by the National Natural Science Foundation of China(grant No.21776217 and 21978214) 

主　　题：Hollow nanoparticles Polydimethylsiloxane nanoparticles Mixed matrix membranes Nanocavity Gas separation 

摘      要：Mixed matrix membranes(MMMs)with the performance between the matrix and the filler is a promising strategy for membranes with excellent gas *** this study,the hollow polydimethylsiloxane nanoparticles were synthesized and then incorporated with the poly(oxide ethylene)monomer and tri-functional cross-linker to form mixed matrix membranes by in situ *** hollow nanoparticles formed the independent closed nanocavities in membranes,which enhanced the gas permeability contributed by both the improved diffusivity and *** high loading,the hollow polydimethylsiloxane nanoparticle was converted into the continuous phase with the cross-linked poly(oxide ethylene)as the dispersed *** preferred to permeate through the connected cluster of hollow polydimethylsiloxane nanoparticles,finally leading to ultrahigh gas per-meabilities far going beyond the instinct values of polydimethylsiloxane and the cross-linked poly(oxide ethylene).The optimized membrane with 34 wt%hollow nanoparticles loadings exhibited ultrahigh permeabilities with the values of 44186 Barrer for CO_(2) and 11506 Barrer for O_(2),accompanied with a CO_(2)/N_(2) selectivity of 9.9 and an O_(2)/N_(2) selectivity of 2.6,which exceeded the 2008 Robeson upper bound for O_(2)/N_(2) and located at the 2008 Robeson upper bound for CO_(2)/N_(2).