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    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

    Year: 2019

    Journal: J. Colloid Interface Sci., Volume 536, 1-Feb, page 474–482

    Authors: Benito, Javier; Vidal, Julio; Sanchez-Lainez, Javier; Zornoza, Beatriz; Tellez, Carlos; Martin, Santiago; Msayib, Kadhum J.; Comesana-Gandara, Bibiana; McKeown, Neil B.; Coronas, Joaquin; Gascon, Ignacio

    Organizations: European Community Seventh Framework Program (EU PF7) (FP7/2007-2013) under project M4CO2 [608490]; Spanish MINECO (Ministry of Economy and Business); FEDER (European Regional Development Fund)European Union (EU) [MAT2016-77290-R]; Aragon GovernmentGobierno de Aragon [E31_17R, T43_17R]; ESFEuropean Science Foundation (ESF)European Social Fund (ESF); Spanish Education Ministry Program FPU2014

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

    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.
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