Real (ideal) contact angle (smooth surface) and surface energy are important factors in determining the surface interaction and dynamic surface properties of composites. The focus of this work is to investigate the surface properties, such as real contact angle, surface energy, and resistance of carbon-Nafion composites. Carbon-Nafion composites were fabricated by controlling the Nafion fraction from 5% to 70%. Apparent contact angle of carbon-Nafion composites with different compositions were measured by Kruss DSA 100 surface analyzer. Roughness of surface and average thickness of samples were measured by profilometer. According to Wenzel model, the real contact angle of carbon-Nafion systems was calculated from apparent contact angle and roughness. Surface energy was calculated by using four different theories, which are Acid base, Equation of state, Wu, and Fowkes. Then resistance of carbon-Nafion systems was investigated by electrochemical impedance spectroscopy (Auto Lab). Other analytical characteristics will be investigated in further research.

Surface interfacial properties of carbon-Nafion composites

243rd National Meeting (2012)

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