| 초록 |
Facilitated olefin transport membrane, containing positively charged silver nanoparticles (Ag NPs) as olefin carriers dispersed in poly(vinyl pyrrolidone) (PVP), leads extremely high separation performances for propylene/propane mixtures. The positive charge on the surface of Ag NPs was induced by electron acceptors which plays a vital role in determining the olefin carrier activity and consequently the separation performance. In this study, as representatives of electron withdrawing nitroaromatic compounds, 1,2-dinitrobenzene (DNB) and 3,4-dinitro toluene (DNT) were used for PVP/Ag NPs membranes. The correlation between the surface charge density of Ag NPs and the separation performance was investigated. A fairly good linear correlation between the surface charge density and the separation performance was confirmed, which meant that the positive charge density on the surface of Ag NPs is a key factor in determining the separation performance of facilitated olefin transport membranes. |
