Journal
SOFT MATTER
Volume 12, Issue 33, Pages 7005-7011Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6sm01081d
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Funding
- Diputacion Foral de Gipuzkoa
- University of the Basque Country UPV/EHU [UFI 11/56]
- Basque Government [GVIT373-10]
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Coatings have a tremendous impact on economy as they reduce corrosion that has an estimated cost of 3% of the world's GDP. Hydrophobic coatings are particularly efficient for this purpose and the challenge is to produce cost effective and environmentally friendly, highly hydrophobic, cohesive and non-porous coatings applicable to large and irregular surfaces. This work shows that this goal can be achieved by forming wrinkles on the surface of waterborne coatings through fine-tuning of the film forming conditions. The proof of concept was demonstrated by using waterborne dispersions of copolymers of 1H, 1H, 2H, 2H-perfluorodecyl acrylate and 2-ethylhexyl acrylate, and using the temperature and hardness of the copolymer as control variables during film formation. This allowed the formation of transparent films with a wrinkled surface that had a contact angle of 133 degrees, which represents an increase of 20 degrees with respect to the film cast under standard conditions.
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