Abrasion-Resistant, Hot Water-Repellent and Self-Cleaning Superhydrophobic Surfaces Fabricated by Electrophoresis of Nanoparticles in Electrodeposited Sol-Gel Films

摘要

The present work reports on a new strategy for fabrication of mechanically stable and environmental-friendly superhydrophobic surfaces. First, a novel cost-effective approach is developed to synthesize superhydrophobic SiO_2 (SH-SiO_2) nanoparticles at room temperature through the reaction between the surface reactive groups on commercial SiO_2 nanoparticles and the longchain alkyl fluorine-free organosilane. Then, the superhydrophobic films are constructed by electrophoresis of SH-SiO_2 nanoparticles into a matrix of robust and highly porous electrodeposited silica film. The as-prepared superhydrophobic composite surfaces exhibit high abrasion resistance, excellent repellency even to hot water droplet, and good self-cleaning properties in either air or oil environment.