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We present a facile, low-cost, and fast method for preparing superamphiphobic surface with water contact angle and rapeseed oil contact angle of 160° and 153° on steel substrate. The fabrication process is composed of the phosphate, Cu co-deposition in phosphating bath and the low surface energy materials modification by 1H,1H,2H,2H-peruorodecyltriisopropoxysilane (FAS-17). Contact angle measurement, X-ray diffraction, scanning electron microscopy equipped with energy-dispersive spectrometry, X-ray photoelectron spectroscopy, and electrochemical workstation were carried out to investigate the surface wettability, chemical composition, morphology, and anti-corrosion performance. Results show that the optimal CuSO·5HO concentration for the surface to achieve superamphiphobicity is 6 g L, and the prepared surface exhibits excellent mechanical abrasion resistance on 600 grit SiC sand paper. Moreover, the dynamic frosting-defrosting experiments indicated that the surface has a good anti-frosting ability. The potentiodynamic polarization proves that the superhydrophobic surface can protect the steel substrate from corrosion solution. Meanwhile the surface also shows a good chemical stability under different pH values and excellent self-cleaning ability in both muddy water and lubricating oil. [ABSTRACT FROM AUTHOR]

[Display omitted] • Superhydrophobic PLA surface can be prepared by a one-step spraying methods. • The as-prepared PLA fabric can be used for continuous oil-water separation. • The as-prepared PLA fabric can separate oil-water mixtures under harsh environments. • The as-prepared PLA fabric exhibits outstanding environmental and mechanical stability. Various types of functional materials incorporating superhydrophobic components have been rapidly developed for efficient oil/water separation. The post-processing of these used separated materials remains a challenging problem due to their non-biodegradable characteristics in natural environments, thus easily contributing to secondary contamination. Herein, we report a biodegradable superhydrophobic PLA fabric with hierarchical coral-like micro/nano structures by a one-step spraying method. The as-prepared PLA fabric was found to be both superhydrophobic and superoleophilic with a static water contact angle of 161 ± 2° and an oil contact angle of 0°. In addition, the as-prepared PLA nonwoven fabrics also revealed efficient continuous oil separation efficiency (>97.5%) and tiny water droplet collection efficiency, as well as high oil flux ranging from 2239 L·m−2·h−1 to 59,713 L·m−2·h−1. Furthermore, these fabrics retained their inherent wetting property and oil separation ability in a variety of acidic and basic solutions, 3.5 wt% NaCl solution, hot (100 °C), and freezing (0 °C) temperatures. This study provides a novel and environmentally friendly method for preparing biodegradable oil–water separation materials with green post-treatment characteristics when compared to the non-biodegradable separation materials, indicating potential applications in the fields of green water treatment and petroleum refining. [ABSTRACT FROM AUTHOR]

• The coating cures quickly to obtain a superhydrophobic surface. • Prepared coating can be applied to a variety of complex surfaces. • The coating has good temperature resistance. • The coating has a certain degree of chemical and physical stability. Because of its significant role in the field of self-cleaning, super-hydrophobic coatings have attracted more and more attention from researchers around the world, while the properties of environmental weather resistance and structure-stability often limit the application in daily life of which. In this study, a fast curing super-hydrophobic coating with good thermal tolerance as well as structure-stability and can be applied to a variety of surfaces conveniently was fabricated with fluorocarbon resin (FEVE), methyl methacrylate (MMA) and micro/nanometer scale powders via solution method. A scanning electron microscope (SEM) and a confocal laser scanning microscope (CLSM) were used to evaluate the coating micro morphology. The influence of material content ratio of each component on wettability was analyzed by contact angle measuring instrument. The composition testing of Fourier Transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) indicated that the coating has a high fluorine content. And the test of friction, constant temperature and immersion experiments showed appropriate physical/chemical stability and weather fastness of the coating. [ABSTRACT FROM AUTHOR]