Reproducible and fast preparation of superhydrophobic surfaces via an ultrasound-accelerated one-pot approach for oil collection

The currently available superhydrophobic coating techniques that utilize mussel-inspired polydopamine to construct hierarchical structures require multiply procedures and are time-consuming processes. Here, we propose an ultrasound-accelerated strategy various commercial sponges with hierarchically structured surfaces by briefly submerging into a slightly alkaline aqueous mixture comprising dopamine hydrochloride (DA) dodecyltrimethoxysilane (DTMS) under ultrasound. ultrasound is found significantly accelerate the surface from PDA, while only minorly influences hydrolysis of DTMS hydrophobically modifies PDA. As result, formed within 25 min. In addition, superhydrophobicity can be recovered repeating this ultrasound-assisted process, provided feature vanished or lost during their use in harsh environment. These superior materials for oil collection water, durably robust, efficient recyclable manner multi-life span. This presents rather high time-saving process constructing/recovering surfaces, which may useful rapid engineering restorable surfaces.