Nepenthes Pitcher Inspired Anti‐Wetting Silicone Nanofilaments Coatings: Preparation,Unique Anti‐Wetting and Self‐Cleaning Behaviors |
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| Authors: | Junping Zhang Aiqin Wang Stefan Seeger |
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| Affiliation: | 1. Center of Eco‐material and Green Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Science, Lanzhou, P. R. China;2. Physikalisch‐Chemisches Institut, Universit?t Zürich Irchel, Zürich, Switzerland |
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| Abstract: | Nepenthes pitcher inspired anti‐wetting coatings, fluoro‐SNs/Krytox, are successfully fabricated by the combination of fluoro‐silicone nanofilaments (fluoro‐SNs) and Krytox liquids, perfluoropolyethers. Fluoro‐SNs with different microstructure are grown onto glass slides using trichloromethylsilane by simply repeating the coating step, and then modified with 1H,1H,2H,2H‐perfluorodecyltrichlorosilane. Subsequently, the Krytox liquid is spread on the fluoro‐SNs coatings via capillary effect. The fluoro‐SNs/Krytox coatings feature ultra‐low sliding angle for various liquids, excellent stability, and transparency. The sliding speed of liquid drops on the fluoro‐SNs/Krytox coating is obviously slower than on the lotus inspired superhydrophobic and superoleophobic coatings, and is controlled by composition of the coating (e.g., morphology of the fluoro‐SNs, type of Krytox and its thickness) and properties of the liquid drops (e.g., density and surface tension). In addition, the self‐cleaning property of the fluoro‐SNs/Krytox coating is closely related to properties of liquid drops and dirt. |
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| Keywords: | silicone nanofilaments sliding speed self‐cleaning surface chemistry silanes |
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