首页|Wettability regulation from superhydrophilic to superhydrophobic via nanosecond laser ablation

Wettability regulation from superhydrophilic to superhydrophobic via nanosecond laser ablation

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Metal surfaces play a crucial role in numerous applications,from self-cleaning and anti-icing to anti-fogging and oil-water separation.The regulation of their wettability is essential to enhance their performance in these areas.This paper proposes a multi-state regulation method for metal surface wettability,leveraging nanosecond laser ablation.By creating non-uniform microstructures on a metal surface,the contact area between the solid and liquid phases can be increased,resulting in the attainment of superhydrophilic properties(contact angle(CA),ranging from 4.6° t0 8.5°).Conversely,the construction of uniform microstructures leads to a decreased solid-liquid contact area,thereby rendering the metal surface hydrophilic(CA=12.2°-53°).Furthermore,through heat treatment on a surface with uniform microstructures,organic matter adsorption can be promoted while simultaneously reducing surface energy.This process results in the metal surface acquiring hydrophobic properties(CA=92.1°-133.5°),facilitated by the"air cushion effect."Building on the hydrophobic surface,stearic acid modification can further reduce surface energy,ultimately bestowing the metal surface with superhydrophobic properties(CA=150.1°-152.7°,and sliding angle=3.8°).Performance testing has validated the durability and self-cleaning effectiveness of the fabricated superhydrophobic surface while also highlighting the excellent anti-fog performance of the superhydrophilic surface.These findings strongly indicate the immense potential of these surfaces in various engineering applications.

nanosecond laser ablationsurface wettabilitysuperhydrophobicsuperhydrophilic

CHEN Zhi、WU ZhiCheng、ZHANG GuoJun、LI DongHui、HAN FengLin

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State Key Laboratory of Precision Manufacturing for Extreme Service Performance,College of Mechanical and Electrical Engineering,Central South University,Changsha 410083,China

Guangdong Provincial Key Laboratory of Manufacturing Equipment Digitization,Guangdong HUST Industrial Technology Research Institute,Dongguan 523808,China

China Harzone Industry Corp.,Ltd.,Wuhan 430299,China

Natural Science Foundation of Hunan Province,ChinaNatural Science Foundation of Changsha City,ChinaFundamental Research Funds for the Central Universities of Central South UniversityFundamentals and Application Fundamentals Foundation of Guangdong Province,ChinaProject of State Key Laboratory of Precision Manufacturing for Extreme Service Performance,Central South UniversityProject of Guangdong Provincial Key Laboratory of Manufacturing Equipment Digitization

2023JJ30669kq22082732023ZZTS09672022A15150I1226ZZYJKT2022-102020B1212060014

2024

10.1007/s11431-023-2640-2

中国科学:技术科学(英文版)
中国科学院

中国科学:技术科学(英文版)

CSTPCDEI
影响因子：1.056
ISSN：1674-7321
年,卷(期)：2024.67(6)
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