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Facile fabrication of superhydrophobic alloy surface based on room temperature vulcanized silicone modification

  • Shangda Chen
  • Hao Wang
  • Zuteng Wan
  • Ling Chen
  • Yangchengyi Liu
  • Hanghai Fan
  • Bowen Zhong
  • Xiufeng WangEmail author
Article
  • 26 Downloads

Abstract

Superhydrophobicity of alloy surfaces is generally determined by the low-energy chemical composition and geometric structure of the surface. The appropriate geometry on alloy surfaces can be easily constructed via chemical etching methods. However, the subsequent low-energy modifications for pre-etched alloys are time-consuming or expensive, thus preventing their further application. Here, we prepared superhydrophobic alloy surfaces based on combining wet chemical etching and room temperature vulcanized (RTV) silicone treatment. Compared to traditional immersion methods, RTV silicone treatment for superhydrophobic 6061 Al alloy surfaces needs only 30 s, which is several thousand times faster than stearic acid or polymethyl triethoxy silane solution treatment. Mechanisms of RTV silicone treatment were investigated. The results show that dip-coating modification is different from these traditional methods. We found that the optimized proportion for RTV silicone rubber is HPDMS, PMTSi, and DBTDL with hexane solvent (HPDMS:PMTSi:DBTDL:hexane = 4:3:1:46, weight ratio), and the water contact angles of treated surfaces of pre-etched 6061 Al alloy, pure Al, and steels are 159° ± 2.7°, 168° ± 1.2°, and 169° ± 1.5°, respectively. Herein, our results demonstrate a facile, low-cost strategy to fabricate superhydrophobic alloy surface that is notable and easy to scale up for industrial applications.

Keywords

Superhydrophobic alloy surface RTV silicone Immersing modification Curing reaction 

Notes

Acknowledgments

The authors acknowledge the financial support to this research from the National Natural Science Foundation of China through Grants 11872326 and Natural Science Foundation of Hunan Province through Grants 2018JJ2379 and 2018JJ2396 and Open Fund from Institute of Flexible Electronics Technology of THU (2019KF1102).

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Copyright information

© American Coatings Association 2019

Authors and Affiliations

  • Shangda Chen
    • 1
  • Hao Wang
    • 1
  • Zuteng Wan
    • 1
  • Ling Chen
    • 1
  • Yangchengyi Liu
    • 1
  • Hanghai Fan
    • 1
  • Bowen Zhong
    • 1
  • Xiufeng Wang
    • 1
    • 2
    Email author
  1. 1.School of Materials Science and EngineeringXiangtan UniversityHunanChina
  2. 2.Institute of Flexible Electronics Technology of THUJiaxing, ZhejiangChina

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