Pervaporation separation of water-ethanol mixture through the membrane of poly(thioether amide)s prepared from aromatic amide and 1,4-benzenedithiol
✍ Scribed by Eizo Oikawa; Michiko Shingai; Kiyoshi Motomi; Toshiki Aoki
- Publisher
- Elsevier Science
- Year
- 1995
- Tongue
- English
- Weight
- 832 KB
- Volume
- 101
- Category
- Article
- ISSN
- 0011-9164
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✦ Synopsis
Three different poly(thioether amide)s containing trifluoromethyl (FT), sulfonyl (ST) or pyridinediyl group (PB) were prepared by a Michael-type polyaddition reaction. The separation peffernmnce of their membranes was studied and compared with each other on the structure difference. Their tight membranes were commonly water-permselective in pervap¢,'ation (PV) of a water-ethanol mixture. The order of separation factor was ST> PB > FT, with ST especially being highly water-permselective. The evaporation time greatly influenced PV performance, and FT readily formed an opaque membrane on gelling after a short evaporation period, showing an ethanol-permselective behavior.