Journal
NANO LETTERS
Volume 14, Issue 8, Pages 4803-4809Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl5019782
Keywords
Superhydrophobic surfaces; hydrogels; multifunctional; stretchable; transparent; hierarchical; coatings
Categories
Funding
- University of Texas at Austin
- Ralph E. Powe Jr. Faculty Award
- Chinese National Key Fundamental Research Project [2013CB932900, 2011CB92210]
- National Natural Science Foundation of China [61229401, 61076017, 60990314]
- Programs of NCET
- PAPD
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Superhydrophobic surfaces are of immense scientific and technological interests for a broad range of applications. However, a major challenge remains in developing scalable methodologies that enable superhydrophobic coatings on versatile substrates with a combination of strong mechanical stability, optical transparency, and even stretchability. Herein, we developed a scalable methodology to versatile hydrophobic surfaces that combine with strong mechanical stability, optical transparency, and stretchability by using a self-assembled hydrogel as the template to in situ generate silica microstructures and subsequent silanization. The superhydrophobic coatings can be enabled on virtually any substrates via large-area deposition techniques like dip coating. Transparent surfaces with optical transmittance as high as 9896 were obtained. Moreover, the coatings exhibit superior mechanical flexibility and robustness that it can sustain contact angles similar to 160 degrees even after 5000 cycles of mechanically stretching at 100% strain. The multifunctional surfaces can be used as screen filters and sponges for the oil/water separation that can selectively absorb oils up to 40X their weight.
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