Fabrication and Tribological Performance of Superhydrophobic Film on Zinc Substrate

doi:10.3724/SP.J.1077.2012.00390

Abstract

Abstract:

The super-hydrophobic films on Zinc (Zn) substrate were fabricated by a simple two-step process. Firstly, nano-structured film was created to roughen Zn surface by solution oxidation process in the presence of N, N,-dimethylformamide (DMF). Resultant roughened Zn surface was then overcoated with stearic acid to achieve superhydrophobicity. Scanning electron microscope, FT-IR microscope and water contact angle measurement were performed to characterize the morphological feature, chemical composition and super-hydrophobicity of the surface. The resulting surfaces with uniform and packed nanorod structure have a water contact angle as high as about 155^o and provide effective friction-reducing and wear protection for Zn substrate, due to the combined beneficial effects of nanotexturing of DMF treatment and nanolubrication of self-assembled stearic acid overcoat.

Key words: superhydrophobicity, Zn, friction, film

CLC Number:

WAN Yong, WANG Zhong-Qian, LIU Yi-Fang. Fabrication and Tribological Performance of Superhydrophobic Film on Zinc Substrate[J]. Journal of Inorganic Materials, 2012, 27(4): 390-394.

Figures/Tables 6

Fig. 1 SEM images of Zn substrate (a) before and (b) after DMF treatment at 65℃ for 24?h

Fig. 2 Water contact angle of stearic acid deposited on both bare and oxidized zinc substrates as a function of the duration of the immersion time at room temperature

Fig. 3 IR spectra of Zn with and without DMF treatment dipped into stearic acid solution for 24?h

Fig. 4 Friction coefficient of Zn with and without DMF treatment

Fig. 5 Friction coefficient of stearic acid films on untreated Zn substrate

Fig. 6 Friction coefficient of stearic acid films on Zn substrate treated by DMF

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