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

Javier Benito, Julio Vidal, Javier Sánchez-laínez, Beatriz Zornoza, Carlos Téllez, Santiago Martín, Kadhum J. Msayib, Bibiana Comesaña-gándara, Neil B. Mckeown, Joaquín Coronas, Ignacio Gascón

Research output: Contribution to journalArticlepeer-review

Abstract

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 for use 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 (2D chains or conventional contorted 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/N2 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%).
Original languageEnglish
Pages (from-to)474-482
JournalJournal of Colloid and Interface Science
Volume536
Early online date25 Oct 2018
DOIs
Publication statusE-pub ahead of print - 25 Oct 2018

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