期刊
MACROMOLECULAR RAPID COMMUNICATIONS
卷 32, 期 7, 页码 579-586出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/marc.201000690
关键词
free volume; gas separation; iptycene; membranes; polyimides
资金
- Ministry of Education, Science, and Technology (MEST) in Korea
- Ministry of Knowledge and Economy (MKE)
- National Research Foundation of Korea [R31-2011-000-10092-0] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
This paper reports a new polyimide design with high internal free volume elements for fast mass transport simultaneously with high selectivity. Here, we show that the polymer design using a three-dimensional rigid molecular structure having internal void space can lead to the formation of high fractional free volume with proper cavity size to separate small gas molecules with high selectivities as high permeabilities. These findings could strongly impact emerging gas separation applications using polymeric membranes such as natural gas purification and biogas purification to get clean energy resources.
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