Superhydrophobic surfaces possess low mechanical strength, and can be easily contaminated by fluids with low surface tension, such as oil; this hinders their practical applications. In this study, fluorinated epoxy was prepared through the thiol-ene click reaction at first. The superhydrophobic surface with high oil-repellency was prepared by the addition of unmodified nano-SiO₂ and micron-SiO₂ to the fluorinated epoxy. The effect of the ratio of micro- and nano-silica particles on the morphology and wettability of the coating was investigated. It was shown that a re-entrant structure appears and FEP-S coating has good liquid repellency when the amounts of nano-SiO₂ and micro-SiO₂ are equal. The contact angles of the FEP-S coating (coating with the best liquid repellent performance) for water, glycerol, ethylene glycol, and diiodomethane were 158.6° ± 1.1°, 152.4° ± 0.9°, 153.4° ± 1.3°, and 140.7° ± 0.9°, respectively. In addition, the superhydrophobic coatings possess excellent mechanical and chemical durability, excellent performance in self-cleaning, corrosion resistance, and anti-icing properties. The preparation method of superhydrophobic coating is relatively simple; therefore, it has a wide range of applications and can also be applied to various substrates.

A novel porous oil-sorption material covered by a superhydrophobic fiberglass cloth was fabricated, in which the superhydrophobic fiberglass cloth facilitated oil–water separation and the cotton or foam provided storage for the oil that permeated through the superhydrophobic fiberglass cloth. It is crucial to prepare superhydrophobic silica (SiO₂) particles by the application of dodecyltrimethoxysilane. Epoxy resin was used as a binder to coat superhydrophobic silica on the surface of the fiberglass cloth. The adhesive force between the fiberglass cloth and the superhydrophobic silica was found to be strong. The water contact angle of the superhydrophobic microsilica/fiberglass cloth (modified fiberglass cloth) was 155 ± 1°, the oil contact angle was always 0° and the water–oil separation efficiency was 95.80%. The modified fiberglass cloth showed good acid–alkali resistance. Cotton or foam covered by the superhydrophobic microsilica/fiberglass cloth had good water–oil separation performance, oil-sorption recyclability and a maximum oil-sorption capacity for high-temperature oil of up to 17.07 ± 0.59 g/g. As oil-sorption materials are simple to manufacture and inexpensive, they are a good option for use in the removal of oil pollutants.