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Super-durable, non-fluorinated superhydrophobic free-standing items

Zhang, X; Zhi, D; Sun, L; Zhao, Y; Tiwari, MK; Carmalt, CJ; Parkin, IP; (2018) Super-durable, non-fluorinated superhydrophobic free-standing items. Journal of Materials Chemistry A , 6 (2) pp. 357-362. 10.1039/C7TA08895G. Green open access

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Abstract

Although superhydrophobic coatings are commercially available, their weak mechanical durability hinders their large-scale applications such as for structural materials. Here a general press-in-mold method is reported to rapidly fabricate super-robust and non-fluorinated superhydrophobic free-standing items, through dispersing hydrophobic SiO2 nanoparticles into a series of polymers. The mechanical and chemical strength can be greatly improved by increasing the fabrication pressure, and the materials are found to retain superhydrophobicity after knife/file scratch, liquid nitrogen test, severe sand/water impacts, acidic/alkali corrosion and 2000 cm sandpaper abrasion. These materials achieved better abrasive-resistance than commercial superhydrophobic coatings and higher retention ratio after abrasion tests and hardness than those of bricks. Radar diagrams were used to generalize the results of the mechanical and chemical tests to compare material performances of SiO2/polymer blocks with bricks and commercial superhydrophobic coatings. The SiO2/polymer blocks achieved much better overall performance. This simple method has great potential for making either small domestic items or structural materials with robust superhydrophobicity.

Type: Article
Title: Super-durable, non-fluorinated superhydrophobic free-standing items
Open access status: An open access version is available from UCL Discovery
DOI: 10.1039/C7TA08895G
Publisher version: http://doi.org/10.1039/C7TA08895G
Language: English
Additional information: This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.
Keywords: Super-durable, superhydrophobic, non-fluorinated, free-standing, radar diagram
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
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > MAPS Faculty Office
URI: https://discovery.ucl.ac.uk/id/eprint/10037793
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