A systematic approach was developed for the synthesis of a novel class of ceramic-supported polymer (CSP) pervaporation membranes. The approach is based on the surface modification of a ceramic support membrane by a graft-polymerization procedure. The two step modification procedure consists of silylation of surface hydroxyls, which provides the anchoring sties for the grafted chains, followed by a free radical graft polymerization reaction. This procedure allows for the attachment of either hydrophillidc or hydrophobic polymers. For pervaporation applications the polymer phase serves to allow permeation of the selected compound while preventing others from passing through the membrane. The polymer for a specific seapration taksk is selected based on a a thermodymamic approach which makes sue of the hansen solubility parameters. In this work two polymers, polyvinylacetate (PVAc) was selected to demonstrate the graft polymerization approach and its applicability to the synthesis of CSP membranes.
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