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Fabrication and Condensate Microdrop Self-Propelling of Biomimetic Nanostructured Polymer Surfaces without Chemical Modification

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posted on 10.04.2019, 00:00 by Han-Xiong Huang, Yue An
Condensate microdrop self-propelling (CMDSP) can occur on the cicada wing surfaces due to very low solid–liquid adhesion of the closely packed nanopillars. A promising and industrial strategy is proposed for successively replicating the nanopillars on the cicada wing onto the polypropylene (PP) surfaces. Its process includes nickel replica fabrication and PP replica injection molding. Packed nanopillars with nanoscale interspaces endow the PP replicas with CMDSP functionality. Mechanism for the CMDSP on the PP replica is analyzed. This work should be the first report of achieving the CMDSP function on polymer surfaces without chemical modification, which is favorable for industrial applications such as anti-icing/frosting and enhanced condensation heat transfer.