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Journal of Sol-Gel Science and Technology

, Volume 91, Issue 1, pp 208–215 | Cite as

A robust, flexible superhydrophobic sheet fabricated by in situ growth of micro-nano-SiO2 particles from cured silicone rubber

  • Jutao SunEmail author
  • Xiaokai Shi
  • Yu Du
  • Yueqiao Wu
Original Paper: Sol–gel and hybrid materials with surface modification for applications
  • 51 Downloads

Abstract

Here, we report a multifunctional superhydrophobic material achieved through the in situ growth of micro-nano-SiO2 particles from the surface of a preswollen silicone rubber sheet by sol–gel methods. The contact angles of the sheets reached 162°. The scanning electron microscopy (SEM) photographs showed that 0.8–1 μm SiO2 microspheres grew in situ on the surface of the silicone rubber sheets. The microspheres had 30–70 nm nanoscale bulges on their surfaces that formed micro-nano-structures, like a “lotus leaf”. The sizes of the micro-SiO2 particles and nanobulges were both controllable. The superhydrophobic sheets showed excellent water repellency and self-cleaning performance and exhibited satisfactory durability against mechanical abrasion, rubbing, bending, and long-term underwater storage. The mechanical robustness was attributed to a thick micro-nano-SiO2 layer formed on the surface instead of a monolayer hydrophobic coating. The superhydrophobic rubber sheets were not fluorinated, demonstrated robustness and elasticity, were easy to prepare, and were expected to provide unique advantages for a wide range of applications in biomedicine, energy and electronic devices.

The superhydrophobic silicone sheet has been achieved by the in situ growth of micro-nano SiO2 particles from the surface of a preswollen silicone sheet. The microspheres pack together and form a dense layer on the surface of silicone sheets.

Highlights

  • A multi-performance superhydrophobic rubber sheet is prepared.

  • Superhydrophobicity is achieved by growing lotus-like structure on cured rubber.

  • Morphologies of the lotus-like structure are controllable.

  • Superhydrophobic sheets have good durability against various mechanical damages.

Keywords

Superhydrophobic elastomer Micro-nano-structure SiO2 nanoparticles In situ growth Mechanical robustness Silicone rubber 

Notes

Acknowledgements

The authors acknowledge financial support through the Key Research and Development Project of Shandong Province (2018GSF117019) and the Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-plastics (KF201704).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Key Laboratory of Rubber-Plastics, Ministry of Education, Shandong Provincial Key Laboratory of Rubber-plasticsQingdao University of Science & TechnologyQingdaoPeople’s Republic of China

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