期刊
SEPARATION AND PURIFICATION TECHNOLOGY
卷 63, 期 1, 页码 200-206出版社
ELSEVIER
DOI: 10.1016/j.seppur.2008.05.007
关键词
mixed matrix membrane; polymer blending; zeolite loading; gas separation
资金
- Ministry of Science, Technology and Environment of Malaysia
- National Science Fellowship
This study investigates the gas separation performance of a mixed matrix membranes flat sheet based on polyethersulfone/polyimide (PES/PI) miscible blend incorporated with zeolite particles. Zeolite 4A was selected and its loading were varied between 10 and 50 wt%. Initial attempt of annealing at 150 and 240 degrees C resulted in ideal separation factors far lower than the intrinsic values of the host polymeric membranes. The ideal separation factor was improved by a factor of 5 by increasing the annealing temperature up to 280 degrees C, which is above the glass transition temperature (T-g) of the polymer blend. Only one Tg was observed in DSC analysis, indicating the high miscibility of PES/PI polymer blend and zeolite particles. The ideal separation factors of O-2/N-2 were higher compared to the value reported for the PES/PI blend membrane and the value increased with increasing zeolite loading. It is concluded that addition of zeolite particles into the matrix of PES/PI polymer blend has significant effect on the membrane structure and properties. (C) 2008 Elsevier B.V. All rights reserved.
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