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    Fluoropolymers coatings on polydimethylsiloxane for retarding swelling in toluene

    Year: 2011

    Journal: Thin Solid Films 2012, 520 (6) pp 2293-2300, 20121211

    Authors: Valentina Arima, Monica Bianco, Antonella Zacheo, Alessandra Zizzari, Elisabetta Perrone, Lucia Marra, Ross Rinaldi

    Organizations: National Nanotechnology Laboratory (CNR-Istituto di Nanoscienze), Distretto Tecnologico ISUFI, Università del Salento, via Arnesano, 73100 Lecce, Italy

    Microfluidic architectures for lab-on-a-chip applications are often made of polydimethylsiloxane (PDMS), a polymeric material easy to use, cheap and widely compatible with biomaterials but with a low stability towards organic solvents. Its chemical resistance can be increased by covering the channel walls with relatively stable films. In this perspective, fluoropolymers are a class of interesting materials due to their inertness properties. In this work we prepared coatings of fluoropolymers on PDMS and we characterized them by Quartz Crystal Microbalance, Atomic Force Microscopy, and contact angle. The swelling tests performed gave a proof of their application for increasing PDMS stability towards organic solvents. The incorporation of fluoropolymers into PDMS microchannels was also demonstrated.