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New PVDF microcapsules for application in catalysis

Paper ID Volume ID Publish Year Pages File Format Full-Text
48233 46497 2008 10 PDF Available
Title
New PVDF microcapsules for application in catalysis
Abstract

Novel polyvinylidene fluoride (PVDF) porous microcapsule membranes were successfully prepared with non-solvent induced phase inversion method for the immobilization of catalyst ammonium molybdate tetrahydrate ((NH4)6Mo7O24·4H2O).The chemical–physical analysis of the new PVDF catalytic microcapsules was carried out by means of SEM, EDX, IR, DSC and XRD techniques.Catalytic activity of the PVDF catalytic microcapsules has been evaluated in the oxidation of benzyl alcohol to benzaldehyde in solvent free conditions. The polymeric microcapsules “keep in contact” the two phases: the organic phase, containing the substrate and the product, and the aqueous phase with the oxidant, H2O2. In literature, ((NH4)6Mo7O24·4H2O) was reported to be effective in the oxidation of alcohols with H2O2 in combination with a phase transfer catalyst in chlorinated solvents.The effect of reaction temperature, substrate:oxidant ratio, swelling of polymeric microcapsules on the reaction progress was investigated.PVDF catalytic microcapsules have given proof of their complete stability under oxidation conditions and their good recycle.

Keywords
Catalytic polymeric microcapsules; Selective oxidation; Polyvinylidene fluoride; Ammonium molybdate tetrahydrate; Phase inversion
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 80, Issues 3–4, 8 May 2008, Pages 185–194
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
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Price was $35.95
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