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  • Direct replication of micro...
    Maghsoudi, K.; Momen, G.; Jafari, R.; Farzaneh, M.

    Applied surface science, 11/2018, Letnik: 458
    Journal Article

    Display omitted •Superhydrophobic HTV silicone rubber by direct replication using compression molding.•Micro-nanostructured Al templates were produced using simple chemical etching.•Antistiction coating preserved both template and replicate patterns during demolding.•Self-cleaning samples easily removed introduced contaminants on the surface. We describe a simple method for fabricating superhydrophobic high temperature vulcanized (HTV) silicone rubber surfaces by direct replication using a compression molding system. The resulting rubber samples possessed micro-nanostructures on the surface. This micro- and nano-scale roughness produced a water contact angle of >160° and a contact angle hysteresis of <3°. The roughness patterns on chemically etched aluminum surfaces, which served as templates, were successfully replicated on the rubber surfaces. An antistiction coating applied to the template surface ensured that the rubber was completely removed during demolding and that the replicated micro-nanostructures on the silicone surface were preserved. Surface roughness of the aluminum templates was optimized at HCl concentrations of 15 wt.%, with a lower roughness value observed at acid concentrations above and below this value. The developed HTV silicone rubber surfaces also demonstrated a freezing delay and a self-cleaning capacity.