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Fabrication of superoleophobic hierarchical surfaces for low-surface-tension liquids
| 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)
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Submitter: 幅崎 浩樹
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