关键词: pervaporation membrane;preparation condition;polydimethylsiloxane;characterization

Abstract: Pervaporation membrane with preferential permeation for organic compounds over water was
preparedand characterized. Selection of membrane material and the effects of
polydimethylsiloxane (PDMS), cross-linker,and catalyst concentrations on performances of
pervaporation membrane at room temperature were discussed. Inaddition, the time of cross-
linking, and the kinds of basic plate in the process of preparation were tested.
Theformulation of pervaporation membrane material was determined. Through the
characterization of membrane byinfrared spectrometry(IR), scanning electron microscopy
(SEM), transmission electron microscopy(TEM) and Xray diffraction(XRD), it is proved that
the structures and characters are suitable for the pervaporation process.Experiments also
demonstrate that the permeate flux and separation factor are suitable for the process.

Key words: pervaporation membrane, preparation condition, polydimethylsiloxane, characterization