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Switchable wettability control of titanium via facile nanosecond laser-based surface texturing

文献类型： 外文期刊

作者： Wang, Qinghua 1 ; Wang, Huixin 3 ; Zhu, Zhixian 1 ; Xiang, Nan 1 ; Wang, Zhandong 1 ; Sun, Guifang 1 ;

作者机构： 1.Southeast Univ, Sch Mech Engn, Nanjing 211189, Peoples R China

2.Jiangsu Key Lab Design & Mfg Micronano Biomed Ins, Nanjing 211189, Peoples R China

3.Jiangsu Acad Agr Sci, Inst Agr Facil & Equipment, Nanjing 210014, Peoples R China

关键词： Laser surface texturing; Wettability control; Microstructure; Surface chemistry; Titanium

期刊名称：SURFACES AND INTERFACES （ 影响因子：4.837； 五年影响因子：4.497 ）

ISSN： 2468-0230

年卷期： 2021 年 24 卷

页码：

收录情况： SCI

摘要： Control of surface wettability is very important and useful for many industrial applications, and can be realized by controlling surface chemistry and microstructure simultaneously. Here, we present a facile laser-based surface texturing method to achieve switchable wettability control on titanium surface. The experimental results indicate that the laser-treated surfaces became superhydrophilic immediately upon laser texturing. Using alternate lowtemperature heat treatment and UV irradiation, the wettability of the laser-treated surface could be efficiently switched between superhydrophilicity and superhydrophobicity for many times. Surface morphology and chemistry analyses confirm that the reversible wettability transition should be attributed to the combined effect of the dual-scale surface structure and controllable surface chemistry. Using the laser-based wettability control method, a water collection device was fabricated and demonstrated by a superhydrophobic-superhydrophilic hybrid surface pattern. The developed method could enable a practical throughput for large-area processing, and endow various industrial applications.

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