Journal
JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH
Volume 18, Issue 5, Pages 1245-1259Publisher
SPRINGER
DOI: 10.1007/s11998-021-00485-x
Keywords
Photocatalytic activity; Superhydrophobic; Self-cleaning; TiO2; Fluorosilicone resin
Funding
- State Grid Corporation of China [520626170025]
Ask authors/readers for more resources
The study produced superhydrophobic photocatalytic coatings by adding different amounts of TiO2, which transitioned the coatings from superhydrophobic to superhydrophilic. It was found that coatings with more durable superhydrophobicity maintained their initial wettability and exhibited superior photocatalytic properties. Mechanisms were proposed based on analyzing the microstructures of the coatings.
In this study, superhydrophobic photocatalytic fluorosilicone/SiO2-TiO2 (FSi/SiO2-TiO2) coatings were prepared. Evolutions of wettability and photocatalytic activities were explored by exposing a series of samples to UV irradiation and the outdoor environment. Their practical self-cleaning performances were also compared. The UV-irradiation test was carried out in an ultraviolet aging test chamber. Wetting properties, including water contact angles and sliding angles, were measured using a contact angle meter. A UV spectrophotometer was employed to detect and evaluate the coatings' photocatalytic properties. Moreover, morphologies and surface roughness values were tested through field emission scanning electron microscope and optical profilometer, respectively. It is shown from experimental results that the coating series with more TiO2 addition amounts transform from superhydrophobic to superhydrophilic in a shorter time. The coating with a more durable superhydrophobicity can maintain its initial wettability, while its photocatalytic property is superior to that of a hydrophobic coating. Mechanisms were put forward through analyzing the coating microstructures. It is considered that the superhydrophobic coating with a Cassie-Baxter surface structure shows a better photocatalysis. Besides, it has been confirmed that the practical self-cleaning performance of the prepared superhydrophobic photocatalytic FSi/5TiO(2)-32SiO(2) coating is better in comparison with superhydrophobic FSi/SiO2 and photoinduced superhydrophilic FSi/5TiO(2)-28SiO(2) coatings.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available