Improving separation performance of high-silica zeolite membranes by surface modification with triethoxyfluorosilane

N. Kosinov, V.G.P. Sripathi, E.J.M. Hensen

Research output: Contribution to journalArticleAcademicpeer-review

26 Citations (Scopus)

Abstract

Treatment with triethoxyfluorosilane (TEFS) enhances the hydrophobic properties of high-silica MFI and MEL membranes synthesized by a microwave-assisted secondary growth method. The modified membranes showed significant improvement in recovery of ethanol from ethanol/water mixtures by pervaporation. The TEFS treatment was also able to heal some intercrystalline defects in the zeolite membrane film. Additional physical–chemical characterization revealed that the external zeolite surface is selectively covered by the organosilane without blocking zeolite micropores. The grafted Si–F moieties are thermally and hydrothermally stable.
Original languageEnglish
Pages (from-to)24-30
Number of pages7
JournalMicroporous and Mesoporous Materials
Volume194
DOIs
Publication statusPublished - 2014

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