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Abstract

High-performance coatings that durably and fully repel liquids are of interest for fundamental research and practical applications. Such coatings should allow for droplet beading, roll off and bouncing, which is difficult to achieve for ultralow surface tension liquids. Here we report a bottom-up approach to prepare super-repellent coatings using a mixture of fluorosilanes and cyanoacrylate. On application to surfaces, the coatings assemble into thin films of locally multi-re-entrant hierarchical structures with very low surface energies. The resulting materials are super-repellent to solvents, acids and bases, polymer solutions and ultralow surface tension liquids, characterized by ultrahigh liquid contact angles (>150°) and negligible roll-off angles (~0°). Furthermore, the coatings are transparent, durable and demonstrate universal liquid bouncing, tailored responsiveness and anti-freezing properties, and are thus a promising alternative to existing synthetic super-repellent coatings.

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Data supporting the findings of this study are available within the article (and its Supplementary Information) and from the corresponding authors upon reasonable request.

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Acknowledgements

This research was conducted jointly and funded by the National Natural Science Foundation of China (NSFC grant nos 51703056, 21707031, 21606081, 21527810, 21521063, 21575036, 21307029, 21221003, 21205034 and 21190041), National Key Basic Research Program (project no. 2011CB911000), China Postdoctoral Science Foundation (project no. 2016M602402), China Scholarship Council (file no. 201606130022), Natural Science Foundation of Hunan Province of China (project no. 2018JJ3028), Horizon 2020/European Union (grant agreement no. 745676), Australian Research Council (ARC) Centre of Excellence in Convergent Bio-Nano Science and Technology (project no. CE140100036) and the ARC under the Australian Laureate Fellowship scheme (grant no. FL120100030).

Author information

Author notes

  1. These authors contributed equally: Shuaijun Pan, Rui Guo.

Affiliations

  1. State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, China

    • Shuaijun Pan
    • , Rui Guo
    • , Ling Li
    • , Chang Peng
    • , Weijian Xu
    •  & Jianhui Jiang
  2. ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, and the Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria, Australia

    • Shuaijun Pan
    • , Rui Guo
    • , Mattias Björnmalm
    • , Joseph J. Richardson
    • , Nadja Bertleff-Zieschang
    •  & Frank Caruso
  3. Department of Materials, Department of Bioengineering, and the Institute of Biomedical Engineering, Imperial College London, London, UK

    • Mattias Björnmalm
  4. College of Science, Hunan Agricultural University, Changsha, China

    • Chang Peng

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Contributions

R.G. and S.P. conceived the ideas and, with the help of W.X., J.J. and F.C., designed and conducted the experiments, and analysed the data. All the authors discussed and interpreted the results and contributed to the writing of the paper.

Competing interests

The authors declare no competing interests.

Corresponding authors

Correspondence to Shuaijun Pan or Weijian Xu or Jianhui Jiang or Frank Caruso.

Supplementary Information

  1. Supplementary Information

    Supplementary Video Legends 1–26, Supplementary Figures 1–36, Supplementary Tables 1–3, Supplementary References 1–31

  2. Supplementary Video 1

    Hexane drop bouncing on a planar superomniphobic (SOP) substrate

  3. Supplementary Video 2

    Pentane drop rolls off a SOP slope of 18°

  4. Supplementary Video 3

    Pentane drop rolls off a SOP slope of 37°

  5. Supplementary Video 4

    Pentane drop bounces on a SOP woven fabric (low Weber number)

  6. Supplementary Video 5

    Pentane drop breaks through the facial SOP coating (medium Weber number)

  7. Supplementary Video 6

    Pentane drop bounces on a full SOP coating (medium Weber number)

  8. Supplementary Video 7

    Jumping satellite drop of pentane (high Weber number)

  9. Supplementary Video 8

    Coalescence of extruded satellite drops of pentane (higher Weber number)

  10. Supplementary Video 9

    Continuous impacting of pentane jet

  11. Supplementary Video 10

    Bouncing of HF on coated TLC plate

  12. Supplementary Video 11

    Bouncing of PVDF solution

  13. Supplementary Video 12

    Bouncing of FC-72 at high temperatures

  14. Supplementary Video 13

    Bouncing of FC-72 at high atmospheres

  15. Supplementary Video 14

    Impact of liquid nitrogen droplet on a coated TLC plate

  16. Supplementary Video 15

    Rolling off liquid nitrogen filament on a coated TLC plate

  17. Supplementary Video 16

    Impact of liquid nitrogen droplet on a coated print paper

  18. Supplementary Video 17

    Wetting of liquid nitrogen on an uncoated TLC plate

  19. Supplementary Video 18

    Freezing of water on a five-tier substrate

  20. Supplementary Video 19

    Freezing of water on a four-tier substrate

  21. Supplementary Video 20

    Freezing of water on a three-tier (microstructure) substrate

  22. Supplementary Video 21

    Freezing of water on a three-tier (nanostructure) substrate

  23. Supplementary Video 22

    Freezing of water on a two-tier substrate

  24. Supplementary Video 23

    Freezing of water on a one-tier (control) substrate

  25. Supplementary Video 24

    Impinging water drop on a −20 °C SOP substrate (We = 3)

  26. Supplementary Video 25

    Reduced contact time of water droplet with a −20 °C SOP substrate (We = 60)

  27. Supplementary Video 26

    Scratch durability testing

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DOI

https://doi.org/10.1038/s41563-018-0178-2