| 초록 |
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 ATRP. This self-assembled copolymer is used to template the growth of AgBr nanoparticles with diameters of 1050 nm, as characterized by UVvis, XRD and 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 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. |
