Polymeric membranes from colloidal templates with tunable morphology
Polymeric porous membranes were fabricated from templates made from silica particles. The templates were obtained by self-assembly and by the Langmuir-Blodgett (L-B) technique. For the self-assembly technique, suspensions of silica particles in ethanol were used to create the deposits. L-B deposition was employed to produce templates of different particle sizes for the fabrication of asymmetric membranes. Two different polymers were tested to fabricate membranes: polystyrene (PS) and the diethyleneglycol dimethacrylate (DEGDMA)/urethane dimethacrylate (UDMA) copolymer. Templates and porous films were observed by SEM in order to analyze the pore morphology. Permeability of the poly (DEGDMA/UDMA) films was comparable to commercially available membranes. Proposed applications for these ordered porous structures include, sensors, filters, and catalytic materials. © 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Casis, N; Ravaine, S; Reculusa, S; Colvin, VL; Wiesner, MR; Estenoz, DA; Fidalgo de Cortalezzi, MM
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