Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
637030 | Journal of Membrane Science | 2009 | 8 Pages |
Abstract
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 65:35Â 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 10-50Â 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+NO3â), the surface of AgBr nanoparticles is more partially positively charged due to the interactions between NO3â 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 CC 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.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Filtration and Separation
Authors
Joo Hwan Koh, Sang Wook Kang, Jung Tae Park, Jin Ah Seo, Jong Hak Kim, Yong Soo Kang,