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Research on Hard, Transparent and Hydrophobic Coating on PMMA Sheet

Authors :
Guoqing Wu
Xiaoping Chen
Xuanyu Xie
Pu Zhang
Shenyu Ge
Wei Chen
Xian Zeng
Ruoye Wang
Source :
Applied Sciences, Vol 12, Iss 24, p 12927 (2022)
Publication Year :
2022
Publisher :
MDPI AG, 2022.

Abstract

In this paper, nano SiO2 particles modified organic silane coatings were successfully prepared to aim at the application of the self-cleaning coating on PMMA substrate for deep-sea optical windows. The chemicals, surface microstructure, wettability, hardness, adhesion, transparency, water scouring resistance as well as microorganism attachment rate of the coatings were investigated. The results showed that adding SiO2 nanoparticles into the organic silicon coating can effectively improve the hydrophobicity due to generating a micro-nano structure surface. However, excessive addition would result in a decrease in hydrophobicity, adhesion, as well as transparency, due to the inorganic SiO2 particle destroying the integrity of the organic coating. The optimal coating was obtained by adding 0.5 wt% nano SiO2 particles, which possessed a water contact angle of 114.2°, hardness of 4H, adhesion level of 0, and visible light transmittance of 0.886. After 40-h water scouring, the water contact angle decreased to 108.3° and the visible light transmittance decreased to 0.839, suggesting good water scouring resistance. The microorganism attachment rate of the S05 coating was 0.17% after a 6 h immersion test, which was about half that of the PMMA substrate.

Details

Language :
English
ISSN :
20763417
Volume :
12
Issue :
24
Database :
Directory of Open Access Journals
Journal :
Applied Sciences
Publication Type :
Academic Journal
Accession number :
edsdoj.4d8ba7897a642ccbeb2665f3807411f
Document Type :
article
Full Text :
https://doi.org/10.3390/app122412927