期刊
RSC ADVANCES
卷 8, 期 10, 页码 5127-5135出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7ra11043j
关键词
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资金
- National Nature Science Foundation of China [21476015, 21676014, 21706008]
- Beijing Natural Science Foundation [2172041]
- China Postdoctoral Science Foundation [2017M610037]
In the current work, MCM-41/polydimethylsiloxane (PDMS) mixed matrix membrane (MMM) was prepared for effective n-butanol pervaporation from a model aqueous solution. In order to improve the compatibility between MCM-41 and PDMS, different types of silane coupling agents including n-propyltrimethoxysilane (PTMS), n-octyltrimethoxysilane (OTMS), n-dodecyltrimethoxysilane (DTMS) and n-hexadecyltrimethoxysilane (HDTMS) were used to modify the MCM-41. The results showed that the highest n-butanol separation performance was achieved by bonding 20 wt% of PTMS-modified MCM-41 with PDMS. Under these conditions, total flux of 1476 g m(-2) h(-1) was obtained when separating a 1.5 wt% n-butanol aqueous solution at 55 degrees C. The total flux increased by nearly 40% compared to the pure PDMS membrane with no obvious changes of the n-butanol separation factor at the same time. The curing process of the casting solution was also significantly improved after MCM-41 modification.
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