The permeability behavior of polyvinylpyrrolidone-modified porous silica membranes
1993; Elsevier BV; Volume: 84; Issue: 1-2 Linguagem: Inglês
10.1016/0376-7388(93)85057-4
ISSN1873-3123
AutoresRobert P. Castro, Yoram Cohen, Harold G. Monbouquette,
Tópico(s)Polymer Surface Interaction Studies
ResumoThe surface of 4100 Å-pore-size silica membranes was modified with a covalently bonded polyvinyl-pyrrolidone brush layer by a novel graft polymerization process. Hydraulic permeability measurements performed with six different solvents and both unmodified and modified membranes suggest that the permeability of the modified membrane is determined by the configuration of the terminally anchored polymer chains. In the modified ceramic-supported polymeric (CSP) membrane, the swelling of the polymer brush layer increases as the solvent power increases, resulting in a decrease in the pore radius and subsequently, the permeability.
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