Wetting behaviour of hydrophilic and hydrophobic nanostructured porous anodic alumina
Wetting behaviour of hydrophilic and hydrophobic nanostructured porous anodic alumina
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DOI：
10.1016/j.colsurfa.2012.12.010
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发表时间：
2013-03-05
影响因子：
5.2
通讯作者：
Mattia, Davide
中科院分区：
文献类型：
--
作者：
Leese, Hannah;Bhurtun, Vivek;Mattia, Davide
本文研究了纳米结构多孔阳极氧化铝（PAA）表面结构和化学性质对润湿性能的影响。平衡表观接触角（APCA）的测量首先在产生的亲水性纳米多孔氧化铝上进行，所述亲水性纳米多孔氧化铝具有10至170 nm的孔径范围，产生10至100度的接触角范围。然后用氟硅烷涂覆PAA以改变纳米结构的表面化学。观察到与亲水性情况相同的趋势，但是对于疏水性PM，对于10至100 nm的孔径，接触角从106度增加至150度。这些结果探讨了目前的润湿模型，如Cassie-Baxter和Wenzel方程的纳米结构材料的限制。已经开发了一个几何模型，使用Marmur提出的方程来解释裸和硅烷化PAA的润湿性能。(C)2012 Elsevier B. V.保留所有权利。
This paper investigates the effect of surface structure and chemistry on the wetting properties of nanostructured porous anodic alumina (PAA). Measurements of the equilibrium apparent contact angle (APCA) were first taken on as produced hydrophilic nanoporous alumina with a range of pore diameters from 10 to 170 nm, yielding a range of contact angles from 10 to 100 degrees. The PAAs were then coated with a fluorosilane to change the surface chemistry of the nanostructures. The same trend was observed as in the hydrophilic case, but the contact angles increased from 106 to 150 degrees for pores sizes ranging from 10 to 100 nm for the hydrophobic PM. These results probe the limits of the current wetting models such as the Cassie-Baxter and Wenzel equations for nanostructured materials. A geometric model has been developed using the equation proposed by Marmur to explain the wetting properties of the bare- and silanized-PAA. (C) 2012 Elsevier B.V. All rights reserved.