A sturdy self-cleaning and anti-corrosion superhydrophobic coating assembled by amino silicon oil modifying potassium titanate whisker-silica particles

摘要

Graphical abstractA simple spraying method is used for fabricating self-cleaning and anti-corrosion fluorine-free superhydrophobic coatings by introducing the potassium titanate whisker (PTW), wrapped around polydopamine (PDA) and grafted with silica (SiO2) via sol-gel method, as well as benign low-surface energy amino silicon oil (ASO) into poly(phenylene sulfide) (PPS) matrix. The prepared superhydrophobic PPS/ASO/PTW-SiO2composite coating demonstrated excellent water repellency, self-cleaning and corrosion resistance under rigorous conditions.Display OmittedHighlights•The sturdy superhydrophobic coating was fabricated without fluoride.•Modified whisker improved the water repellency and self-cleaning property of coating.•The coating shows high anticorrosion performance even after 28 d immersion.•The abrasion loss of composite coating is only half of the pure polymer coating.AbstractA sturdy self-cleaning and anticorrosion superhydrophobic coating based on poly(phenylene sulfide) (PPS) matrix has been successfully fabricated by combination of sol-gel and spraying technology without using any fluorine materials. The prepared coating possessed excellent superhydrophobicity with the water contact angle (WCA) (161 ± 1.2)° and slide angle (SA) (2 ± 1.5)°, which was ascribed to the synergistic effect of low-surface energy material amino silicon oil (ASO) and the binary potassium titanate whisker-silica (PTW-SiO2) composite particles formed by in-situ growth of SiO2on modified PTW via sol-gel. Moreover, The PPS/ASO/PTW-SiO2superhydrophobic coating exhibited decent self-cleaning property with clean surface even after 100 times immersion in muddy solution. The abrasion test demonstrated that the mechanical stability of prepared coating was about 2 times of the pure PPS coating. Simultaneously, the potentiodynamic polarization and electrochemical impedance spectroscopy testified the excellent corrosion resistance of prepared coating with the performance of lower corrosion current (1.289 × 10−10 A/cm2) and high protection efficiency (99.999%) even after immersion in 3.5 wt.% NaCl solution for 28 days. It is believed that this sturdy self-cleaning and anti-corrosion superhydrophobic coating might have a promising application prospect in industry.