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Enhanced gas separation properties of metal organic frameworks/polyetherimide mixed matrix membranes
Author(s) -
Duan Cuijia,
Kang Guodong,
Liu Dandan,
Wang Lina,
Jiang Can,
Cao Yiming,
Yuan Quan
Publication year - 2014
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.40719
Subject(s) - polyetherimide , permeation , gas separation , solubility , membrane , dimethylacetamide , materials science , chemical engineering , polymer , thermal diffusivity , metal organic framework , permeability (electromagnetism) , polymer chemistry , selectivity , gaseous diffusion , penetrant (biochemical) , solvent , chemistry , organic chemistry , composite material , thermodynamics , fuel cells , biochemistry , physics , catalysis , adsorption , engineering
Metal organic frameworks (MOFs) are supposed to be ideal additives for mixed matrix membranes (MMMs). In this article one kind of MOFs, Cu 3 (BTC) 2 , is synthesized, then directly incorporated into a model polymer (Ultem®1000) using N,N‐dimethylacetamide as solvent. Cu 3 (BTC) 2 particles are uniformly dispersed and there are no interfacial defects in the prepared MMMs when Cu 3 (BTC) 2 loading is not more than 35 wt %, seen in SEM images. Pure gas permeation tests show that gas permeability increases obviously with Cu 3 (BTC) 2 loading increase, while ideal selectivities of CO 2 /N 2 and CO 2 /CH 4 are almost unchanged. For MMM with the best separation property, CO 2 permeability increases about 2.6 times and CO 2 /N 2 selectivity remains almost unchanged. Results about gas diffusivity and solubility indicate that gas diffusivity and solubility make contribution to gas permeability increase at the same time but in different ways. Gas permeation properties of MMMs are well predicted by Maxwell or Bruggeman model. © 2014 The Authors Journal of Applied Polymer Science Published by Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131 , 40719.