多尺度微结构对铝合金表面疏水性能的影响

doi:10.11896/cldb.18070134

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Abstract he micro-groove array was fabricated by micro-milling technology and WEDM. The width of convex platform was changed to obtain the first order structure with different rough factors. A secondary structure with different rough factors was obtained by processing micro-groove surface with different pulse width parameters. The surface hydrophobic properties of different rough factors were observed and the hydrophobic mechanism was analyzed. The results show that, on the surface of the aluminum alloy with an intrinsic contact angle of 50°, the single-scale microstructure constructed by micro-milling technology realizes the transition from hydrophilic to hydrophobic on the surface of the aluminum alloy, and the multi-scale structure of micro-milling-EDM processing achieves the superhydrophobic performance of the aluminum alloy surface. When the secondary structure is certain, the contact angle of the aluminum alloy surface machined by composite machining decreases linearly with the increase of the roughness factor of the first order structure. When the first order structure is certain, the contact angle of the aluminum alloy surface after the composite processing increases firstly and then decreases with the increase of the surface roughness. The contact state of primary structure is a transitional state between Cassie model and Wenzel model, the contact state of the micron crater is Wenzel state, and the contact state of the nano scale structure is Cassie-Baxter state.

Key words： multi-scale microstructure hydrophobic surface micro-milling WEDM

Published: 12 July 2019

CLC number:

O647

Fund:This work was supported by China-EU H2020 International Science and Technology Cooperation Programme (2016YFE0112100, 644971), Jilin Province Science and Technology Development Plan Project (20180101324JC), Science and Technology Project of Jilin Provincial Education Department during the 13th Five-Year Plan Period (JJKH20190542KJ), and Lu Quan Innovation Foundation of College of Meanical and Electric Engineering, Changchun University of Scie-nce and Technology of China.

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	Articles by authors
	WAN Yanling
	ZHANG Meng
	YANG Jian
	YU Huadong

Cite this article:

WAN Yanling,ZHANG Meng,YANG Jian, et al. Effect of Multi-scale Microstructures on the Hydrophobicity of Aluminum Alloy Surface[J]. Materials Reports, 2019, 33(16): 2715-2719.

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http://www.mater-rep.com/EN/10.11896/cldb.18070134 OR http://www.mater-rep.com/EN/Y2019/V33/I16/2715

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