alexa Preparation and gas separation performance of silicone-coated polysulfone membranes
Biochemistry

Biochemistry

Journal of Membrane Science & Technology

Author(s): Jos Marchese, Nelio Ochoa, Cecilia Pagliero

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Composite membranes (CM) were prepared by coating the dense surface of different asymmetric polysulfone flat membranes (AM) with a solution of silicone rubber polymer. The surface porosity (ε) of the dense skin AM samples varied between 4 × 10−5 and 1·5 × 10−8, with an average mean pore size between 0·10 and 0·07 μm. Scanning electron microscopy (SEM), gas permeation experiments (H2, N2, CH4, CO2) and a simple resistance model were used for the determination of structure-permeability relationships. This study indicates that the CM prepared with polysulfone AM having ε < 3 × 10−7, coated with a concentration of 6% silicone solution and a contact time of 1 min, has the best gas separation performance, with selectivities very close to the intrinsic polysulfone selectivities.

This article was published in Journal of Chemical Technology and Biotechnology and referenced in Journal of Membrane Science & Technology

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