Journal
JOURNAL OF MEMBRANE SCIENCE
Volume 339, Issue 1-2, Pages 49-56Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.memsci.2009.04.023
Keywords
Nanoparticles; Silver halide; Composite materials; Hybrid materials; Facilitated transport membrane
Categories
Funding
- Korea government (MEST) [R11-2007-050-04003-0, R01-2008-000-10112-0]
- Energy Technology RD program [2006-E-ID11-P-13]
- National Research Foundation of Korea [R01-2008-000-10112-0, 2008-0057940, 과C6A1908, 2007-0056571, 과C6A1905] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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A novel amphiphilic comb-like copolymer consisting of poly(vinyl chloride) (PVC) main chains and poly(4-vinyl pyridine) (P4VP) side chains, i.e. PVC-g-P4VP with 65:35 wt% is synthesized via atom transfer radical polymerization (ATRP). This self-assembled copolymer is used to template the growth of silver bromide (AgBr) nanoparticles with diameters of 10-50 nm, as characterized by UV-vis spectroscopy, X-ray diffraction (XRD) and transmission electron microscopy (TEM). Upon introduction of ionic liquid, i.e. 1-methyl-3-octylimidazolium nitrate (MOIM+NO3-), the surface of AgBr nanoparticles is more partially positively charged due to the interactions between NO3- ions and the surfaces of nanoparticles, as revealed by FT-Raman and X-ray photon spectroscopy (XPS). We also demonstrate the ability of AgBr as a new type of olefin carrier by tuning the interactions of positively charged AgBr with the C=C bond of olefin molecules. As a result, the membranes containing AgBr nanocomposites exhibit highly stable separation performances for propylene/propane mixture, i.e. a mixed gas selectivity of 6 and a permeance of 5.7 GPU. (C) 2009 Elsevier B.V. All rights reserved.
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