Zeolite-Filled PDMS Membranes. 2. Pervaporation of Halogenated Hydrocarbons

In order to study in more detail the influence of the filler on pervaporation performance, silicalite, ZSM-5, and zeolite Y were incorporated in poly(dimethylsiloxane) (PDMS) and tested in pervaporation experiments with binary mixtures of chlorinated hydrocarbons (Cl-HC's) in water. The results...

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Veröffentlicht in:Journal of Physical Chemistry B: Materials, Surfaces, Interfaces, amp Biophysical Surfaces, Interfaces, amp Biophysical, 1997-03, Vol.101 (12), p.2160-2163
Hauptverfasser: Dotremont, C, Vankelecom, I. F. J, Morobé, M, Uytterhoeven, J.-B, Vandecasteele, C
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container_end_page 2163
container_issue 12
container_start_page 2160
container_title Journal of Physical Chemistry B: Materials, Surfaces, Interfaces, amp Biophysical
container_volume 101
creator Dotremont, C
Vankelecom, I. F. J
Morobé, M
Uytterhoeven, J.-B
Vandecasteele, C
description In order to study in more detail the influence of the filler on pervaporation performance, silicalite, ZSM-5, and zeolite Y were incorporated in poly(dimethylsiloxane) (PDMS) and tested in pervaporation experiments with binary mixtures of chlorinated hydrocarbons (Cl-HC's) in water. The results were compared with unfilled PDMS as a reference. The highest selectivities were obtained with the silicalite-filled membranes. However, these membranes showed a decrease in permeability for voluminous components due to molecular sieving effects. In this respect, the results with zeolite Y were rather disappointing, as its larger pore size was counteracted by its high polarity, whereas ZSM-5-filled membranes showed intermediate selectivities. Therefore, mesoporous silicas were synthesized, silylated to assure their apolarity, and incorporated in PDMS. The resulting membranes showed both improved organic fluxes and selectivities in comparison with all other membranes, even for voluminous organics, proving the absence of molecular sieving effects.
doi_str_mv 10.1021/jp961809u
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subjects 40 CHEMISTRY
FILLERS
HYDROCARBONS
MATERIALS SCIENCE
MEMBRANE TRANSPORT
MEMBRANES
ORGANIC CHLORINE COMPOUNDS
PERMEABILITY
POLYMERS
SILANES
ZEOLITES
title Zeolite-Filled PDMS Membranes. 2. Pervaporation of Halogenated Hydrocarbons
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