Superhydrophobic Surface Modified by Sol-Gel Silica Nanoparticle Coating

Abstract

We reported a superhydrophobic silica-coated surface with a water contact angle of 160° with a 4 μL water droplet, and transparency of 70-86% in the wavelength range of 380-800 nm. The silica film was synthesized at room temperature (22 °C) using sol-gel process by a simple, cost-effective and uniform spin-coating by mixing silicon dioxide sol-gel with γ-(2, 3-epoxypropyloxy) propyltrimethoxysilane (KH-560). The durability of the coating could be effectively enhanced by controlling the ratio of KH-560 and modified silicon dioxide sol-gel. It was believed that this process that we used can hold a great potential in super-hydrophobic surface fabrication.

Heat Stability and Icing Delay on Superhydrophobic Coatings in Facile One Step

“…Silica sols are produced via ethyl orthosilicate catalyzed by hydrochloric acid [ 37 ]. The silica sols were catalyzed by hydrochloric acid and ammonium hydroxide and subsequently modified with expensive fluorosilanes [ 38 ]. In the above methods of preparing superhydrophobic coatings, the preparation of sols requires 24 h of aging.…”

Superhydrophobic Treatment of Polyurethane Sponge and Its Application in Oil-water Separation

“…The understanding of the superhydrophobic surface [13] originates from some plants and animals in nature [14]. They are waterproof, antifouling, reducing resistance and so on [15,16].…”