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Reversible wettability between superhydrophobicity and superhydrophilicity of Ag surface

银表面超疏水性与超亲水性的可逆转变研究

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Abstract

We present a facile one-step method to fabricate superhydrophobic Ag surface by electrodeposition without using any low surface energy reagent. The water contact angle of the prepared surface is 167.1° and the sliding angle is only 0.5° after heat treatment. It is demonstrated by the field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) analyses that the dendrites of rough micro-nanostructure combined with the spontaneously adsorbed hydrocarbon make the surface exhibit superhydrophobicity. However, the superhydrophobic Ag surface becomes superhydrophilic when the surface is irradiated by UV light for several hours. It recovers superhydrophobicity after further heat treatment and can successfully implement the reversible wettability transition between superhydrophobicity and superhydrophilicity for several cycles.

摘要

本文采用简单的电沉积法制备出无需低表面能试剂修饰的超疏水银表面. 镀银表面经过热处理后与水滴的接触角达到167.1°而滚动角仅为0.5°. 通过FESEM, XRD以及XPS分析表明, 制备的微米/纳米级粗糙结构的银表面吸附了空气中的碳氢化合物导致表面具有超疏水性. 当用紫外光照射表面几个小时后, 表面会从超疏水性转变为超亲水性. 然而, 热处理后表面又恢复超疏水性能. 重复紫外光照射和热处理过程, 镀银表面可以实现超疏水和超亲水之间的多次转换.

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Authors and Affiliations

  1. State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an, 710049, China

    Sheng Lei  (雷胜)

  2. School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang, 330063, China

    Fajun Wang  (王法军) & Wen Li  (李文)

  3. School of Materials Science and Engineering, Jiangsu University, Zhenjiang, 212013, China

    Guanjun Qiao  (乔冠军)

Authors
  1. Sheng Lei  (雷胜)
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  2. Fajun Wang  (王法军)
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  3. Wen Li  (李文)
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  4. Guanjun Qiao  (乔冠军)
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Corresponding author

Correspondence to Wen Li  (李文).

Additional information

Sheng Lei received his MSc degree from Nanchang Hangkong University in 2014. He is currently a PhD candidate under the supervision of Prof. Guanjun Qiao at Xi'an Jiaotong University. His research ismainly focused on the superhydrohobic materials.

Wen Li obtained his PhD degree in condensedmatter physics fromJilin University in 1995. He then worked in Changchun University, University of Alberta andWashington State University, respectively. He is currently a professor at the School of Materials Science and Engineering, Nanchang Hangkong University. His research interests focus on new functional materials, interface surface physical chemistry, micro/nano structure and performance.

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Lei, S., Wang, F., Li, W. et al. Reversible wettability between superhydrophobicity and superhydrophilicity of Ag surface. Sci. China Mater. 59, 348–354 (2016). https://doi.org/10.1007/s40843-016-5040-3

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  • DOI: https://doi.org/10.1007/s40843-016-5040-3

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