Study of a super-non-wetting self-cleaning solar reflective blue-grey paint coating with luminescence

Zhuo Yang, Xiao Xue, Jianguo Dai, Yanwen Li, Jie Qin, Ya Feng, Jian Qu, Zhongyu He, Pengcheng Sun, Lijin Xu, Tao Zhang, Tiejun Qu, Weidong Zhang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

10 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)69-80
Number of pages12
JournalSolar Energy Materials and Solar Cells
Volume176
DOIs
Publication statusPublished - 1 Mar 2018

Keywords

  • Artificial accelerated weathering
  • Cooling effect
  • Luminescence
  • Self-cleaning
  • Solar reflectance
  • Super-non-wettability

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films

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