Zeolite-filled PDMS membranes. 2. Pervaporation of halogenated hydrocarbons

Journal Article · Thu Mar 20 04:00:00 EST 1997 · Journal of Physical Chemistry B: Materials, Surfaces, Interfaces, amp Biophysical

DOI:https://doi.org/10.1021/jp961809u· OSTI ID:501929

Dotremount, C; Vankelecom, I F.J.; Morobe, M; Uytterhoeven, J B; Vandecasteele, C ^[1]

---

1. Katholieke Universiteit Leuven (Belgium)

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 (CI-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 shown 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. 8 refs., 7 figs.

• OSTI ID: 501929
• Journal Information: Journal of Physical Chemistry B: Materials, Surfaces, Interfaces, amp Biophysical, Journal Name: Journal of Physical Chemistry B: Materials, Surfaces, Interfaces, amp Biophysical Journal Issue: 12 Vol. 101; ISSN 1089-5647; ISSN JPCBFK
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
40 CHEMISTRY
FILLERS
HYDROCARBONS
MEMBRANE TRANSPORT
MEMBRANES
ORGANIC CHLORINE COMPOUNDS
PERMEABILITY
POLYMERS
SILANES
ZEOLITES