Superhydrophilicity of a nanofiber-covered aluminum surface fabricated via pyrophosphoric acid anodizing
Superhydrophilicity of a nanofiber-covered aluminum surface fabricated via pyrophosphoric acid anodizing
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DOI：
10.1016/j.apsusc.2016.06.088
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发表时间：
2016-12-15
影响因子：
6.7
通讯作者：
Suzuki, Ryosuke O.
中科院分区：
文献类型：
--
作者：
Nakajima, Daiki;Kikuchi, Tatsuya;Suzuki, Ryosuke O.
采用焦磷酸阳极氧化法在铝表面制备了一种由大量氧化铝纳米纤维覆盖的超亲水表面。通过在浓焦磷酸中阳极氧化，在蜂窝状氧化物的底部生长高密度的阳极氧化铝纳米纤维。在纳米纤维覆盖的铝表面上的水接触角随着时间的推移而下降后，4 π液滴被放置在表面上，并在2秒内观察到接触角测量为2.2的超亲水行为;该接触角显著低于电抛光和多孔氧化铝覆盖的铝表面所观察到的接触角。通过不同的恒压阳极氧化条件制备的氧化铝纳米纤维的超亲水性不依赖于密度。在359 h的暴露试验中，阳极氧化铝纳米纤维覆盖的表面保持超亲水性。研究了纳米氧化铝纤维包覆超亲水铝膜的快干性和雪滑性。(C)© 2016 Elsevier B. V.版权所有。
A superhydrophilic aluminum surface covered by numerous alumina nanofibers was fabricated via pyrophosphoric acid anodizing. High-density anodic alumina nanofibers grow on the bottom of a honeycomb oxide via anodizing in concentrated pyrophosphoric acid. The water contact angle on the nanofiber-covered aluminum surface decreased with time after a 4 pi droplet was placed on the surface, and a superhydrophilic behavior with a contact angle measuring 2.2 was observed within 2 s; this contact angle is considerably lower than those observed for electropolished and porous alumina-covered aluminum surfaces. There was no dependence of the superhydrophilicity on the density of alumina nanofibers fabricated via different constant voltage anodizing conditions. The superhydrophilic property of the surface covered by anodic alumina nanofibers was maintained during an exposure test for 359 h. The quick-drying and snow-sliding behaviors of the superhydrophilic aluminum covered with anodic alumina nanofibers were demonstrated. (C) 2016 Elsevier B.V. All rights reserved.