The fabrication of ultrathin films and their gas separation performance from polymers of intrinsic microporosity with two-dimensional (2D) and three-dimensional (3D) chain conformations

JOURNAL OF COLLOID AND INTERFACE SCIENCE

卷:536

Article

Benito, Javier^1,2  Vidal, Julio^1,2  Sanchez-Lainez, Javier^3,4  Zornoza, Beatriz^3,4  Tellez, Carlos^3,4  Martin, Santiago^5,6  Msayib, Kadhum J.⁷  Comesana-Gandara, Bibiana⁷  McKeown, Neil B.⁷  Coronas, Joaquin^3,4  Gascon, Ignacio^1,2 

[1] Univ Zaragoza, INA, C Pedro Cerbuna 12, E-50009 Zaragoza, Spain

[2] Univ Zaragoza, Dept Quim Fis, C Pedro Cerbuna 12, E-50009 Zaragoza, Spain

[3] Univ Zaragoza, Chem & Environm Engn Dept, Zaragoza 50018, Spain

[4] Univ Zaragoza, INA, Zaragoza 50018, Spain

[5] Univ Zaragoza, ICMA, CSIC, C Pedro Cerbuna 12, E-50009 Zaragoza, Spain

[6] Univ Zaragoza, Dept Quim Fis, CSIC, C Pedro Cerbuna 12, E-50009 Zaragoza, Spain

[7] Univ Edinburgh, Sch Chem, EastChem, David Brewster Rd, Edinburgh EH9 3FJ, Midlothian, Scotland

关键词: Ultrathin films;    Polymers of intrinsic microporosity;    Polymer design;    Composite membranes;    Gas separation;   

DOI  :  10.1016/j.jcis.2018.10.075

来源: Elsevier

【 摘 要 】

The expansion of the use of polymeric membranes in gas separation requires the development of membranes based on new polymers with improved properties and their assessment under real operating conditions. In particular, the fabrication of ultrathin films of high performance polymers that can be used as the selective layer in composite membranes will allow large reductions in the amount of the expensive polymer used and, hence, the cost of membrane fabrication. In this contribution, two polymers of intrinsic microporosity (PIMs) with very different chain configurations (two-dimensional, 2D, chains or conventional contorted three-dimensional, 3D, conformation) have been compared in their ability to form ultrathin films, showing the relevance of polymer design to obtain compact and defect-free films. Monolayers of the 2D polymer PIM-TMN-Trip can be efficiently deposited onto poly[1-(trimethylsilyl)-1-propyne] (PTMSP) to obtain composite membranes with a CO2/N-2 selectivity similar to that of the corresponding thick membranes of the same PIM using only a small fraction of the selective polymer (less than 0.1%). (C) 2018 Elsevier Inc. All rights reserved.

【 授权许可】

Free