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Permeation and separation of benzene/cyclohexane mixtures through liquid-crystalline polymer membranes

โœ Scribed by K. Inui; T. Miyata; T. Uragami

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
236 KB
Volume
35
Category
Article
ISSN
0887-6266

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โœฆ Synopsis

The side-chain liquid-crystalline polymer (LCP) was synthesized by the addition of the mesogenic monomer to poly (methylsiloxane) with Pt catalyst. When the benzene/cyclohexane mixtures were permeated through the LCP membranes by pervaporation at various temperatures, the permeation rate increased with increasing benzene concentration in the feed solution and permeation temperature. Though the LCP membranes exhibited a benzene permselectivity, a mechanism of the permeation and separation for the benzene/cyclohexane mixtures was different in the glassy, liquid-crystalline and isotropic state of the LCP membranes. These results suggested that the permselectivity was fairly influenced by the change of the LCP membrane structure, that is, a state transformation. It was found that a balance of the orientation of mesogenic groups and flexibility of siloxane chains is very important for the permeability and selectivity.

๐Ÿ“œ SIMILAR VOLUMES

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โœ K. Inui; T. Miyata; T. Uragami ๐Ÿ“‚ Article ๐Ÿ“… 1998 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 196 KB ๐Ÿ‘ 1 views

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