期刊
JOURNAL OF APPLIED POLYMER SCIENCE
卷 135, 期 30, 页码 -出版社
WILEY
DOI: 10.1002/app.46514
关键词
catalysts; crosslinking; membranes; separation techniques
资金
- National Natural Science Foundation of China [21576132]
- National Key R&D Program of China [2017YFD0400402]
- State Key Laboratory of Materials-Oriented Chemical Engineering [ZK201704]
- Yanhu Plan of Qinhai [Q-SYS-201516-KF-01]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
An active and stable catalytic composite membrane (CCM), poly(vinyl alcohol)-poly(styrene sulfonic acid)/sodium alginate-poly(vinyl alcohol) (PVA-PSSA/SA-PVA), was prepared to enhance the esterification of ethanol and propionic acid. The morphologies and crystal structures of the CCMs were investigated by Fourier transform infrared spectroscopy, scanning electron microscopy, and X-ray diffraction. The effects of catalytic layer thickness, mass ratio of PVA to PSSA, concentration of catalytic layer solution, ratio of reaction volume to membrane area, and molar ratio of propionic acid to ethanol were discussed. The pervaporation results showed that the flux of CCM increased from 118 to 320g m(-2) h(-1) compared with the SA-PVA membrane because of the close affinity and low resistance of PSSA to water. After crosslinking with 3-aminopropylmethyldiethoxysilane, the CCMs had good catalytic activities. The acid conversion reached 92.8% at 75 degrees C in 12h, and the stabilization of the CCM was greatly improved. (c) 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46514.
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