Ultra-Fast Oleophobic-Hydrophilic Switching Surfaces for Anti-Fogging, Self-Cleaning, and Oil-Water Separation

Brown, P.S.; Atkinson, O.; Badyal, J.P.S.

Abstract

Smooth copolymer–fluorosurfactant complex film surfaces are found to exhibit fast oleophobic–hydrophilic switching behavior. Equilibration of the high oil contact angle (hexadecane = 80°) and low water contact angle (<10°) values occurs within 10 s of droplet impact. These optically transparent surfaces display excellent antifogging and self-cleaning properties. The magnitude of oleophobic–hydrophilic switching can be further enhanced by the incorporation of surface roughness to an extent that it reaches a sufficiently high level (water contact angle <10° and hexadecane contact angle >110°), which, when combined with the inherent ultrafast switching speed, yields oil–water mixture separation efficiencies exceeding 98%.

Citation

Brown, P., Atkinson, O., & Badyal, J. (2014). Ultra-Fast Oleophobic-Hydrophilic Switching Surfaces for Anti-Fogging, Self-Cleaning, and Oil-Water Separation. ACS Applied Materials and Interfaces, 6(10), 7504-7511. https://doi.org/10.1021/am500882y

• Journal Article Type: Article
• Acceptance Date: Apr 14, 2014
• Online Publication Date: Apr 30, 2014
• Publication Date: May 28, 2014
• Deposit Date: Oct 31, 2014
• Publicly Available Date: Nov 3, 2014
• Journal: ACS Applied Materials and Interfaces
• Print ISSN: 1944-8244
• Electronic ISSN: 1944-8252
• Publisher: American Chemical Society
• Peer Reviewed: Peer Reviewed
• Volume: 6
• Issue: 10
• Pages: 7504-7511
• DOI: https://doi.org/10.1021/am500882y
• Keywords: Oleophobic−hydrophilic, Switching surface, Antifogging, Self-cleaning, Oil−water separation, Copolymer−fluorosurfactant complex.
• Public URL: https://durham-repository.worktribe.com/output/1442812