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Ultrathin Composite Polymeric Membranes for CO 2 /N 2 Separation with Minimum Thickness and High CO 2 Permeance
Author(s) -
Benito Javier,
SánchezLaínez Javier,
Zornoza Beatriz,
Martín Santiago,
Carta Mariolino,
MalpassEvans Richard,
Téllez Carlos,
McKeown Neil B.,
Coronas Joaquín,
Gascón Ignacio
Publication year - 2017
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201701139
Subject(s) - permeance , membrane , materials science , gas separation , selectivity , chemical engineering , composite number , polymer , polymer chemistry , permeation , composite material , chemistry , catalysis , organic chemistry , biochemistry , engineering
The use of ultrathin films as selective layers in composite membranes offers significant advantages in gas separation for increasing productivity while reducing the membrane size and energy costs. In this contribution, composite membranes have been obtained by the successive deposition of approximately 1 nm thick monolayers of a polymer of intrinsic microporosity (PIM) on top of dense membranes of the ultra‐permeable poly[1‐(trimethylsilyl)‐1‐propyne] (PTMSP). The ultrathin PIM films (30 nm in thickness) demonstrate CO 2 permeance up to seven times higher than dense PIM membranes using only 0.04 % of the mass of PIM without a significant decrease in CO 2 /N 2 selectivity.