Efforts made to efficiently fabricate traditional superhydrophobic coating have always faced limitations such as high cost, recontamination, and sophistication. An artificial superhydrophobic copper stearate (CS) polydimethylsiloxane (PDMS) coating was fabricated to achieve the transition of a water-adhesion surface to a water-repellent surface. This coating formed superhydrophobic surfaces in different types of substrates through dipping, spraying, and brushing, and demonstrated excellent water repellency, low contact angle hysteresis, and weak adhesive forces after exposure to tape-peeling cycles (VHB, 3 M), abrasion cycles, acid/alkali solutions, corrosive solutions, freezing water, and boiling water. Additionally, experiments were conducted on potential applications of the superhydrophobic coating in oil/water separation, self-cleaning, and anti-corrosion.
Yang Cao,Houde Cheng,Ning Gu,Kangtai Ou,Zhi Wang,Qianxiao Liu,Ruihua Guan,Qiang Fu,Youyi Sun
In a long-term working environment, the mechanical durability is still the highest challenge for their practical applications of superhydrophobic coatings. Here, a novel superhydrophobic coating is prepared and developed by the electrostatic spraying to improve mechanical durability. The superhydrophobic coating is composed of polyvinylidene fluoride (PVDF) and SiO 2 nanoparticles modified with n-octyltriethoxysilane (OTS) and γ-methacryloxypropyltrimethoxysilane (KH570). Interestingly, the water contact angle of the superhydrophobic coating increases from 155° to 161.7 o after 600 abrasion cycles, which is rarely reported in previous works. In addition, the superhydrophobic coating exhibits excellent adhesion strength (ca.6.0 MPa) and good anti-icing performance in extremely low temperature environments. The mechanism of above excellent performance is also investigated and proposed by molecular dynamics simulation . This work thus reports a new approach to design and fabricate high-performance superhydrophobic coating for various practical applications.
危险品化学品经营许可证（带存储）