Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 12, Issue 2, Pages 3042-3050Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b19677
Keywords
chemical etching; micropyramid structure; thermal curing; superhydrophobic; large area; durability
Funding
- National Natural Science Foundation of China [51675334]
- Postdoctoral Innovative Talent Support Program [BX201700150]
- China Postdoctoral Science Foundation [2017M621461]
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Inspired by nature, large-area stable superhydrophobic poly(dimethylsiloxane) (PDMS) films have generated extensive interest for various applications such as self-cleaning, corrosion protection, liquid transport, optical services, and flexible electronics. However, the current methods used to prepare such films are difficult to apply for efficient large-area fabrication. In this article, an effective technique for fabricating low adhesive superhydrophobic films based on the use of a chemically etched template followed by a thermal curing process is introduced. On the basis of this approach, the importance of chemical solution concentration as well as etching time is discussed to outline the specific rules required for forming different surface topographies of the templates. Then, PDMS films with varying wettabilities can be fabricated in which one can achieve CA > 160 degrees and SA < 10 degrees. Finally, for engineering needs and actual preparation, large-area PDMS films are obtained via a roll-to-roll (R2R) process, which show a superhydrophobic property even after high-intensity friction and have excellent acid and alkaline resistance, UV resistance, and optical transparency. The prepared large area stable superhydrophobic PDMS films have the potential to be used in the aerospace field in the future because of their excellent anti-icing performance.
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