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Procedure for the Transfer of Polymer Films Onto Porous Substrates with Minimized Defects
Published on: June 22, 2019
Negatively Charged Porous Thin Film from ABA Triblock Copolymer Assembly
Sabrina Nehache1, Mona Semsarilar2, André Deratani3
1Institut Européen des Membranes-IEM, Université de Montpellier, CNRS, ENSCM, Place Eugène Bataillon, 34095 Montpellier CEDEX 05, France. sabrina.nehache@hotmail.fr.
Abstract:
The preparation of well-arranged nano-porous thin films from an ABA triblock copolymer of polystyrene-block-poly(sodium 4-styrenesulfonate)-block-polystyrene (PS-PNaSS-PS) is reported. This copolymer was self-assembled in a N,N-dimethylformamide (DMF)/water mixture and the resulting micellar solution was used to prepare thin films via the compact packing of the flower-like micelles using spin coating method. The films were characterized by several microscopy techniques such as TEM, AFM, and SEM. Permeation test was performed to highlight the interconnected porous nature of the polymeric network obtained. Under applied water pressure, the micellar morphology was altered and a partial fusion of the micelles was observed that resulted in a change in the water permeability. Such hydrophilic nanoporous thin films with negatively charged interface could find applications in membrane filtration.
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