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Fabrication of superoleophobic hierarchical surfaces for low-surface-tension liquids

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Title: Fabrication of superoleophobic hierarchical surfaces for low-surface-tension liquids
Authors: Nakayama, Katsutoshi Browse this author
Tsuji, Etsushi Browse this author →KAKEN DB
Aoki, Yoshitaka Browse this author →KAKEN DB
Habazaki, Hiroki Browse this author →KAKEN DB
Issue Date: 2-Jul-2014
Publisher: Royal Society of Chemistry
Journal Title: RSC Advances
Volume: 4
Issue: 58
Start Page: 30927
End Page: 30933
Publisher DOI: 10.1039/c4ra04144e
Abstract: This study demonstrates the fabrication of hierarchical surfaces with super-repellency even for low-surface-tension liquids, including octane (surface tension of 21.7 mN m(-1)). Dual-pore surfaces were prepared by a combination of practical wet processes on an aluminium substrate: chemical etching, anodizing, and organic monolayer coating. The size of the larger pores formed by the chemical etching of aluminium is controlled by the concentration of HCl in the CuCl2/HCl etching solution. The etched aluminium is then anodized to introduce nanopores, followed by a pore-widening treatment that controls the nanopore size and porosity. The repellency for low-surface-tension liquids is enhanced by increasing the size of the larger pores as well as the porosity of the walls of the larger pores in this dual-pore morphology. Under optimized morphology with a fluoroalkyl-phosphate monolayer coating, an advancing contact angle close to 160 degrees, a contact angle hysteresis of less than 5 degrees and a sliding angle of 10 degrees is achieved even for octane.
Type: article (author version)
URI: http://hdl.handle.net/2115/59458
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 幅崎 浩樹

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