A Superhydrophilic Aluminum Surface with Fast Water Evaporation Based on Anodic Alumina Bundle Structures via Anodizing in Pyrophosphoric Acid

Nakajima, Daiki; Kikuchi, Tatsuya; Yoshioka, Taiki; Matsushima, Hisayoshi; Ueda, Mikito; Suzuki, Ryosuke O.; Natsui, Shungo

A Superhydrophilic Aluminum Surface with Fast Water Evaporation Based on Anodic Alumina Bundle Structures via Anodizing in Pyrophosphoric Acid

Nakajima, Daiki; Kikuchi, Tatsuya; Yoshioka, Taiki et al.

Materials, 2019, 12(21), 3497

Permalink : https://hdl.handle.net/2115/76617

このアイテムのアクセス数:675件（2026-10-17 05:38 集計）

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https://doi.org/10.3390/ma12213497			27

論文情報

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アクセス権	open access
URI	https://hdl.handle.net/2115/76617
タイトル	A Superhydrophilic Aluminum Surface with Fast Water Evaporation Based on Anodic Alumina Bundle Structures via Anodizing in Pyrophosphoric Acid
著者	Nakajima, Daiki ; Kikuchi, Tatsuya ; Yoshioka, Taiki ; Matsushima, Hisayoshi ; Ueda, Mikito ; Suzuki, Ryosuke O. ; Natsui, Shungo
著者名 Nakajima, Daiki
e-Rad_Researcher 60374584 著者名 Kikuchi, Tatsuya
著者名 Yoshioka, Taiki
e-Rad_Researcher 30578026 著者名 Matsushima, Hisayoshi
e-Rad_Researcher 00292053 著者名 Ueda, Mikito
e-Rad_Researcher 80179275 著者名 Suzuki, Ryosuke O.
著者名 Natsui, Shungo
言語	英語
キーワード	aluminum
	anodizing
	pyrophosphoric acid
	superhydrophilicity
	alumina nanofiber
発行日	2019-11
出版者	MDPI
収録物名	Materials
巻(号)	12(21)
ページ	3497
抄録	A superhydrophilic aluminum surface with fast water evaporation based on nanostructured aluminum oxide was fabricated via anodizing in pyrophosphoric acid. Anodizing aluminum in pyrophosphoric acid caused the successive formation of a barrier oxide film, a porous oxide film, pyramidal bundle structures with alumina nanofibers, and completely bent nanofibers. During the water contact angle measurements at 1 s after the water droplet was placed on the anodized surface, the contact angle rapidly decreased to less than 10 degrees, and superhydrophilic behavior with the lowest contact angle measuring 2.0 degrees was exhibited on the surface covered with the pyramidal bundle structures. As the measurement time of the contact angle decreased to 200-33 ms after the water placement, although the contact angle slightly increased in the initial stage due to the formation of porous alumina, at 33 ms after the water placement, the contact angle was 9.8 degrees, indicating that superhydrophilicity with fast water evaporation was successfully obtained on the surface covered with the pyramidal bundle structures. We found that the shape of the pyramidal bundle structures was maintained in water without separation by in situ high-speed atomic force microscopy measurements.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
権利情報	Creative Commons Attribution 4.0 International
関連情報 (isIdenticalTo)	出版社版DOI https://doi.org/10.3390/ma12213497