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Binbin Zhang,Guang Yang,Xiaoqiang Fan,Xiutong Wang,Baorong Hou 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.127 No.-
Improving the mechanical stability and anti-corrosion durability of superhydrophobic material remains agreat challenge that has not been solved. In this paper, we designed and prepared two types of superhydrophobiccoatings using PTFE nanoparticles and waterborne epoxy resin, viz. superhydrophobicPTFE@epoxy single layer coating and superhydrophobic Epoxy + PTFE@epoxy double layer coating. Itwas found that the mechanical stability and interfacial bonding of the superhydrophobic composite coatingswere further improved by introducing an epoxy resin intermediate layer. The superhydrophobicEpoxy + PTFE@epoxy double layer coating maintained excellent non-wetting superhydrophobicity evenafter 150 sandpaper abrasion and 160 tape-peeling cycles. The electrochemical testing results showedthat the Rct and low-frequency modulus values of the superhydrophobic double layer coating improvedby 7–8 orders of magnitude compared with the bare Q235 carbon steel substrate, demonstrating excellentcorrosion resistance. In addition, the coating maintains good corrosion protection after 60 days ofoutdoor atmospheric exposure and 30 days of neutral salt spray acceleration tests, indicating superiorweathering resistance and long-term anti-corrosion properties. The coating also features delayed icing,self-cleaning, anti-fouling, chemical stability, and high substrate applicability, which provides longlastingmultifunctional superhydrophobic materials with comprehensive functions.
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