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Multilayer composite SBS membranes for pervaporation and gas separation by F. Bazzarelli; P. Bernardo; F. Tasselli; G. Clarizia; V.G. Dzyubenko; P. Vdovin; J.C. Jansen is a Engineering article available to read on EtoBox.

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Composite membranes based on poly(styrene-b-butadiene-b-styrene), triblock copolymer (SBS) with 28 wt.% of styrene, were prepared by coating porous hollow fibers and flat sheet supports. The membrane preparation was optimized by modulating different experimental parameters, such as support type, SBS concentration, solvent type, coating thickness, support pre-treatment. On a laboratory scale both normal and vacuum assisted dip-coating methods were used for the hollow fiber geometry, while dope casting was adopted for flat sheet membranes. Single gas permeation measurements were carried out to determine the effective thickness of the coating layer and its integrity. This characterization, coupled with morphological analysis, allowed the optimization of the coating procedure. Appropriate coating conditions yield dense films with a good contact of the coating layer to the support. At sufficiently elevated SBS concentration, the high solution viscosity avoided the polymer infiltration into the support pores. The thickness of the SBS films, ranging from few microns to some tens of microns, meets the requirement for application in pervaporation. Therefore, pilot scale spiral-wound modules

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Author

F. Bazzarelli; P. Bernardo; F. Tasselli; G. Clarizia; V.G. Dzyubenko; P. Vdovin; J.C. Jansen

Publisher

Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 1383-5866)

Published

2011

Language

EN

Field

Engineering (Physical Sciences)