Preparation of hierarchically structured polystyrene surfaces with superhydrophobic properties by plasma-assisted fluorination

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Abstract

The nanotexturing of microstructured polystyrene surfaces through CF4 plasma chemical fluorination is presented in this study. It is demonstrated that the parameters of a surface micropore-generation process, together with the setup of subsequent plasma-chemical modifications, allows for the creation of a long-term (weeks) surface-stable micro- and nanotexture with high hydrophobicity (water contact angle > 150°). Surface micropores were generated initially via the time-sequenced dosing of mixed solvents onto a polystyrene surface (Petri dish) in a spin-coater. In the second step, tetrafluoromethane (CF4) plasma fluorination was used for the generation of a specific surface nanotexture and the modulation of the surface chemical composition. Experimental results of microscopic, goniometric, and spectroscopic measurements have shown that a single combination of phase separation methods and plasma processes enables the facile preparation of a wide spectrum of hierarchically structured surfaces differing in their wetting properties and application potentials.

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Minařík, M., Wrzecionko, E., Minařík, A., Grulich, O., Smolka, P., Musilová, L., … Mráček, A. (2019). Preparation of hierarchically structured polystyrene surfaces with superhydrophobic properties by plasma-assisted fluorination. Coatings, 9(3). https://doi.org/10.3390/coatings9030201

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