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Superrepellent Porous Polymer Surfaces by Replication from Wrinkled Polydimethylsiloxane/parylene F

Fadoua MayoussiAli UsamaKiana KarimiNiloofar NekoonamAndreas GoralczykPang ZhuDorothea HelmerBastian E. Rapp

出版	Universität, 2022
URL	http://books.google.com.hk/books?id=kouWzwEACAAJ&hl=&source=gbs_api

註釋Abstract: Superrepellent surfaces, such as micro/nanostructured surfaces, are of key importance in both academia and industry for emerging applications in areas such as self-cleaning, drag reduction, and oil repellence. Engineering these surfaces is achieved through the combination of the required surface topography, such as porosity, with low-surface-energy materials. The surface topography is crucial for achieving high liquid repellence and low roll-off angles. In general, the combination of micro- and nanostructures is most promising in achieving high repellence. In this work, we report the enhancement of wetting properties of porous polymers by replication from wrinkled Parylene F (PF)-coated polydimethylsiloxane (PDMS). Fluorinated polymer foam "Fluoropor" serves as the low-surface-energy polymer. The wrinkled molds are achieved via the deposition of a thin PF layer onto the soft PDMS substrates. Through consecutive supercritical drying, superrepellent surfaces with a high surface porosity and a high water contact angle (CA) of >165° are achieved. The replicated surfaces show low roll-off angles (ROA)