1. Study of a super-non-wetting self-cleaning solar reflective blue-grey paint coating with luminescence.
- Author
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Yang, Zhuo, Xue, Xiao, Dai, Jian-guo, Li, Yanwen, Qin, Jie, Feng, Ya, Qu, Jian, He, Zhongyu, Sun, Pengcheng, Xu, Lijin, Zhang, Tao, Qu, Tiejun, and Zhang, Weidong
- Subjects
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SOLAR reflective coatings , *LUMINESCENCE , *SURFACE cleaning , *FREE energy (Thermodynamics) , *SURFACE roughness , *LEWIS bases - Abstract
A method for generating a solar reflective blue-grey paint coating with yellow-green luminescence that is cost-effective, industrially scalable, widely applicable, easily repairable, super-non-wetting, self-cleaning, and solar reflective, is introduced. The coating can be manufactured using as-received commercially available materials and following a simple industrial procedure. Grinding the coating surfaces using emery papers with appropriate grit numbers can readily yield appropriate surface roughness, generate suitable micro-grooves and expose micro- and nano-particles on the coating surfaces, thus endowing the coating surfaces with super-non-wettability and self-cleaning property. The surface free energy of the coating only depends on the dispersive component and both the Lewis acid component and the Lewis base component are 0 mN/m. The solar reflective blue-grey coating with solar reflectance of 0.808 can yield a cooling effect of 22.6 °C relative to a flat or low-sloped concrete roof on a typical clear summer sunny day. It emits yellow-green luminescence during the night, thus decorating the buildings to some extent when applied to the external walls of buildings. Although the super-non-wettability of the coating surfaces might be destroyed mainly by the periodic spraying of water (simulated by 400 h of artificial accelerated weathering tests), the super-non-wettability and the self-cleaning property can be completely re-established after roughening the weathered coating surfaces using emery papers with appropriate grit numbers. In terms of optical properties, the solar reflective blue-grey coating with yellow-green luminescence has good resistance to artificial accelerated weathering. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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