Zhou Chaogang, Chen Qiya, Chen Qinggong, Yin Huawei, Wang Shuhuan, Hu Chuanbo
College of Metallurgy and Energy, North China University of Science and Technology, Tangshan, China.
School of Environmental and Chemical Engineering, Chongqing Three Gorges University, Chongqing, China.
Front Chem. 2022 Jul 8;10:943055. doi: 10.3389/fchem.2022.943055. eCollection 2022.
The superhydrophobic coatings with excellent performance are prepared on the brass substrate to improve its application limitations in real production. In this article, the superhydrophobicity was obtained by the modification of TiO nanoparticles, and the FAS/STA-TiO superhydrophobic coating of the composite structure was obtained by modification of 1, 1, 2H, 2H-perfluoroquine trimethyl silane (FAS). By using scanning electron microscopes (SEMs), X-ray spectrometers (EDSs), and Fourier transform infrared (FTIR) spectrometers, the surface morphology, chemical composition, and functional group structure of the samples were analyzed in turn. Experiments show that the water contact angle of the FAS-modified STA-TiO coating reaches 161.3°, and the sliding angle is close to 1.2°. Based on the chalk dust containment, it has enabled noticeable self-cleaning properties. The composite superhydrophobic coating also presents enhanced adhesive strength compared with the single coating by the tape peeling experiment. Moreover, the composite coating has a corrosion current density as low as 8.41 × 10-7 A/cm2, and the largest |Z| in low frequency in a 3.5% NaCl solution to achieve better protection of the brass substrate. It is also not difficult to see that FAS/STA-TiO coating can not only improve the corrosion resistance of brass substrates but also be applied to other metal substrates.
在黄铜基体上制备性能优异的超疏水涂层，以改善其在实际生产中的应用局限性。在本文中，通过对TiO纳米颗粒进行改性获得超疏水性，并通过1,1,2H,2H-全氟癸基三甲氧基硅烷（FAS）改性获得复合结构的FAS/STA-TiO超疏水涂层。利用扫描电子显微镜（SEM）、X射线光谱仪（EDS）和傅里叶变换红外（FTIR）光谱仪依次对样品的表面形貌、化学成分和官能团结构进行分析。实验表明，FAS改性的STA-TiO涂层的水接触角达到161.3°，滑动角接近1.2°。基于对白垩粉尘的抑制，其具有显著的自清洁性能。通过胶带剥离实验，复合超疏水涂层与单一涂层相比还具有增强的附着力。此外，复合涂层在3.5%NaCl溶液中的腐蚀电流密度低至8.41×10-7A/cm2，在低频下|Z|最大，从而对黄铜基体实现更好的保护。不难看出，FAS/STA-TiO涂层不仅能提高黄铜基体的耐腐蚀性，还可应用于其他金属基体。
