Open AccessHydrophobic and optical properties of silica antireflective coating prepared via sol-gel method
Author(s) -
Qianying Zhang,
Hui Liu,
Siyuan Zhao,
Wanmeng Dong
Publication year - 2021
Publication title -
materials research express
Language(s) - English
Resource type - Journals
ISSN - 2053-1591
DOI - 10.1088/2053-1591/abf6fb
Subject(s) - anti reflective coating , tetraethyl orthosilicate , materials science , coating , bifunctional , silicone , chemical engineering , sol gel , dip coating , superhydrophobic coating , contact angle , composite material , transmittance , methyltrimethoxysilane , catalysis , nanotechnology , organic chemistry , optoelectronics , chemistry , engineering
A simple and low-cost process for the preparing of multifunctional coating is essential in practical applications. Here, alkali-catalyzed SiO 2 antireflection coating was first prepared by using the sol-gel method, the tetraethyl orthosilicate (TEOS) and ammonia (NH 3 ·H 2 O) were used as a raw material and catalyst, respectively. Then, a layer of dimethyl silicone was sprayed on the surface of the as-prepared primary coating to obtain a bifunctional coating of antireflection and hydrophobicity simultaneously. The experimental results shown that the peak transmittance of the as-prepared bifunctional coating was 98.11% in the wavelength range of 300–1500 nm, while the water contact angle of the prepared coating was 140°, which was caused by the introduction of hydrophobic methyl groups of dimethyl silicone. Besides, the tape adhesion test and pencil scratch test results shown that the coatings have excellent mechanical robustness. Therefore, this work provides a practical strategy for the preparation of bifunctional coatings with antireflective and hydrophobic properties.