Preparation of Superhydrophobic Fabric Based on Dopamine and Michael Addition under Ultraviolet Light

Abstract

This work reports a simple, stable, and environmentally friendly method to prepare durable superhydrophobic surfaces. First, a polydopamine coating is formed by oxidative polymerization of dopamine to form a secondary reaction platform to provide reaction sites for subsequent experiments. We applied a polydopamine layer onto a fiber surface using the Michael addition-reaction-grafted tetrakis (3-mercaptopropionic acid) pentaerythritol ester, followed by the introduction of tetraallyl silane and (mercapto) methyl siloxane-dimethyl siloxane copolymer on the polydopamine by a thiol–ene click-reaction under ultraviolet light. The resulting superhydrophobic Nylon 56 fabric exhibited a 166° static contact angle as well as excellent stability. The surface morphology of all samples was observed by field emission scanning electron microscope, X-ray photoelectron spectroscopy and energy dispersion spectroscopy, and the elemental composition and surface chemical state of the samples were analyzed. It also had the ability of oil-water separation. Fabric with such benefits broadens the applicability and innovation of superhydrophobic textiles for environmental and industrial applications.

Recent progress of cotton fabric based on bio‐inspired modification for oil/water separation

“…Wang et al 68 used dopamine to self-polymerize under ultraviolet light to prepare superhydrophobic fabrics for water treatment. Firstly, an adhesive polydopamine (PDA) film was formed, and then hydrophobic groups were fixed to the PDA film through the Michael addition reaction to give the fabric superhydrophobic properties.…”