期刊
POLYMER
卷 51, 期 24, 页码 5734-5743出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2010.09.069
关键词
Cross linked poly(ethylene oxide); SIGMA; Membrane gas separation
资金
- US National Science Foundation (NSF) [CBET-0708779]
- US Department of Energy [DE-FG02-02ER15362]
- Center for Layered Polymeric Systems (CLiPS)
- NSF [DMR-0423914]
- U.S. Department of Energy (DOE) [DE-FG02-02ER15362] Funding Source: U.S. Department of Energy (DOE)
Pure gas permeability coefficients of a series of copolymers based on polar hydrophilic poly(ethylene glycol) dimethacrylate n = 14 (PEGDMA) and siloxane-based co-monomer [methyl bis(trimethylsiloxy) silyl] propyl glycerol methacrylate (SIGMA) are reported SIGMA is miscible with PEGDMA and able to form homogeneous films SIGMA contains a bulky siloxane-based end group which acts to increase permeability and an -OH pendant group which Increases miscibility with polar co-monomers such as PEGDMA As the SIGMA content in these copolymers Increases to 53 vol% CO2 permeability increases from 95 to 255 barrer while CO2/N-2 and CO2/H-2 pure gas selectivities decrease from 58 to 20 and 64 to 3 2 respectively At the same time fractional free volume of the copolymer increases from 0 118 to 0 140 Comparisons to a similar copolymer system are made to rationalize the permeability and selectivity trends of this series of copolymers (C) 2010 Elsevier Ltd All rights reserved
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