Journal
CHEMSUSCHEM
Volume 8, Issue 4, Pages 650-658Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.201402677
Keywords
gas-phase reactions; metal-organic frameworks; mixed matrix membranes; polymers; zeolites
Funding
- Korea CCS RD Center [2013M1A8A1035871]
- Energy Efficiency & Resources of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) [20122010100040]
- National Research Foundation of Korea (NRF) - Ministry of Science, ICT Futur Planning [NRF-2013R1A1A1061178]
- [2012R1A2A2A02011268]
- National Research Foundation of Korea [2014M1A8A1049308, 2012R1A2A2A02011268] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Herein, a high performance mixed-matrix membrane (MMM) is reported with simultaneously large improvements in the CO2 permeability by 880% from 70.2 to 687.7Barrer (1Barrer=1x10(-10)cm(3)cmcm(-2)s(-1)cmHg(-1)) and CO2/N-2 selectivity by 14.4% from 30.5 to 34.9. These findings represent one of the most dramatic improvements ever reported for MMMs. These improvements are obtained through an interface and interaction tuning approach based on an amphiphilic grafted copolymer. Poly(vinyl chloride)-g-poly(oxyethylene methacrylate) (PVC-g-POEM) graft copolymer plays a key role as a soft organic matrix to provide good permeation properties, uniform distribution of zeolite imidazole frameworks-8 (ZIF-8), and better interfacial contact with inorganic compounds. In particular, the CO2/C3H8 and CO2/C3H6 selectivities reached 10.5 and 42.7, respectively, for PVC-g-POEM/ZIF (40%) MMMs; this indicates that it could be a promising membrane material for the purification of C-3 hydrocarbons.
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