4.7 Article

Durable fluorinated-SiO2/epoxy superhydrophobic coatings on polycarbonate with strong interfacial adhesion enhanced by solvent-induced crystallization

期刊

PROGRESS IN ORGANIC COATINGS
卷 150, 期 -, 页码 -

出版社

ELSEVIER SCIENCE SA
DOI: 10.1016/j.porgcoat.2020.106002

关键词

Polycarbonate; Superhydrophobic coating; Interfacial adhesion; Solvent-induced crystallization; Mechanical and chemical stability

资金

  1. National Natural Science Foundation of China [51790504, U19A2096, 51721091]
  2. Scientific Research Foundation of International Cooperation and Exchanges of Sichuan Province [2018HH0001]
  3. Programme of Introducing Talents of Discipline to Universities [B13040]

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The study successfully designed mechanically and chemically robust superhydrophobic coatings with strong adhesion to polycarbonate substrates. These coatings showed excellent performance under various external damages and corrosive environments, indicating their potential for harsh outdoor applications based on PC materials.
In this study, we designed mechanically and chemically robust superhydrophobic coatings with strong interfacial adhesion with polycarbonate (PC) substrates by dripping an acetone solution containing fluorinated silica (F-SiO2) nanoparticles and epoxy resin. It was found that the acetone-induced crystallization and roughening of PC leading to a firm bonding of superhydrophobic F-SiO2/epoxy coatings onto the surface of PC substrates. The coatings prepared under the optimal condition showed an excellent superhydrophobic property with a water contact angle (CA) larger than 160 degrees and a sliding angle (SA) smaller than 2 degrees, together with superior anti-icing performance. The coatings retained their excellent superhydrophobicity after various external mechanical damages (such as tape adhesion, knife scratch, finger wiping, and sandpaper wear) and in different corrosive environments (acidic, alkaline, and salinity solutions). Furthermore, the new coatings exhibited outstanding ability against photo-oxidative and hygrothermal aging. Therefore, it is believed that the superhydrophobic coatings prepared have the potential to satisfy the imperative requirements in many harsh outdoor applications based on PC materials.

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