Nanoporous materials based on spiroketal and spirothioketal polymers for separating methanol-toluene mixture

作者：Abdel Razik Hamada Hamada^*; El Bahy Zeinhom Mohamed

来源：Chinese Journal of Polymer Science, 2011, 29(4): 450-455.

DOI：10.1007/s10118-011-1056-4

• Spiroketal polymers
• Nanoporous materials
• Separation membranes

Organic microporous materials based on spiroketal and spirothioketal polymers were synthesized through 1,3-dioxol-forming polymerization reaction between pentaerythritol or pentaerythritol tetrathiol and different types of cyclohexa-1,4-dione derivatives. The structure of the prepared polymers was confirmed by NMR spectroscopy and molecular mass measurements. Nitrogen adsorption/desorption isotherms of the prepared polymers show a large amount of nitrogen adsorbed at low relative pressure indicating microporosity. These polymers have Brunauer Emmitt and Teller (BET) surface areas in the range from 492 (m(2) g(-1)) to 685 (m(2) g(-1)). The prepared polymers were found to be useful for pervaporation separation of methanol-toluene mixture with a separation factor up to 12.5 and fluxes, varying between 6.7 x 10(-3) kg/(m(2) h) and 13.4 x 10(-3) kg/(m(2) h).

• 出版日期2011-7