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All-organic superhydrophobic coatings with mechanochemical robustness and liquid impalement resistance

Peng, C; Chen, Z; Tiwari, MK; (2018) All-organic superhydrophobic coatings with mechanochemical robustness and liquid impalement resistance. Nature Materials , 17 pp. 355-360. 10.1038/s41563-018-0044-2. Green open access

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Abstract

Superhydrophobicity is a remarkable evolutionary adaption manifested by several natural surfaces. Artificial superhydrophobic coatings with good mechanical robustness, substrate adhesion and chemical robustness have been achieved separately. However, a simultaneous demonstration of these features along with resistance to liquid impalement via high-speed drop/jet impact is challenging. Here, we describe all-organic, flexible superhydrophobic nanocomposite coatings that demonstrate strong mechanical robustness under cyclic tape peels and Taber abrasion, sustain exposure to highly corrosive media, namely aqua regia and sodium hydroxide solutions, and can be applied to surfaces through scalable techniques such as spraying and brushing. In addition, the mechanical flexibility of our coatings enables impalement resistance to high-speed drops and turbulent jets at least up to ~35 m s−1 and a Weber number of ~43,000. With multifaceted robustness and scalability, these coatings should find potential usage in harsh chemical engineering as well as infrastructure, transport vehicles and communication equipment.

Type: Article
Title: All-organic superhydrophobic coatings with mechanochemical robustness and liquid impalement resistance
Open access status: An open access version is available from UCL Discovery
DOI: 10.1038/s41563-018-0044-2
Publisher version: https://doi.org/10.1038/s41563-018-0044-2
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Fluids, Wetting
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering
URI: http://discovery.ucl.ac.uk/id/eprint/10046179
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