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Pervaporation Properties to Aromatic/non-aromatic Hydrocarbon Mixtures of Cross-linked Membranes of Copoly(methacrylates) with Pendant Phosphate and Carbamoylphosphonate Groups by Yong Wang; Satoshi Hirakawa; Hongyuan Wang; Kazuhiro Tanaka; Hidetoshi Kita; Ken-ichi Okamoto is a Engineering article available to read on EtoBox.

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A series of copoly(methacrylates) with pendant phosphate and carbamoylphosphonate groups were synthesized. The copolymer membranes were cross-linked by the chemical reaction of either ethylene glycol diglycidyl ether (EGDE) or toluene diisocyanate with hydroxyl or secondary amine groups in copolymer segments at 423 K. Pervaporation (PV) and sorption of aromatic/non-aromatic hydrocarbon mixtures for the membranes were investigated. The membranes were in rubbery state and preferentially permeable to aromatics. The membranes cross-linked with flexible EGDE residues and having diethyl phosphate and/or carbamoylphosphonate groups displayed higher PV performance to benzene/n-hexane (Bz/Hx) mixtures with excellent durability. They had lower specific permeation flux and higher PV selectivity α PV , compared with poly(ethylene oxide imide) segmented block copolymer membranes. The higher α PV was due to a small, but positive contribution of diffusivity selectivity as well as reasonably high solubility selectivity. The lower specific permeation flux was due mainly to the lower diffusion coefficient. This diffusion behavior can be explained by dense polymer-chain packing due to the hydrogen bo

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Author

Yong Wang; Satoshi Hirakawa; Hongyuan Wang; Kazuhiro Tanaka; Hidetoshi Kita; Ken-ichi Okamoto

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0376-7388)

Published

2002

Language

EN

Field

Engineering (Physical Sciences)