Journal
PROGRESS IN ORGANIC COATINGS
Volume 77, Issue 7, Pages 1163-1168Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.porgcoat.2014.04.003
Keywords
Infrared emissivity; Optical properties; Mechanical properties; Prussian blue; Al powder; Composite coatings
Funding
- CNOOC Technology Development Program [CNOOC-KJ 125 00 00 000 00 CTY/2011-04]
- Changzhou Research Program on Applied Fundamentals [20120363]
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Greenish yellow lackluster coatings with low infrared emissivity were prepared by Prussian blue (PB) surface modified Al powders and polyurethanes. The morphology and component of PB/Al powder were characterized by scanning electron microscopy and X-ray diffractometer. The infrared emissivity, surface gloss and visible light color of PB/Al composite coating were investigated by an infrared emissometer, a glossmeter and a colorimeter, respectively. Mechanical properties of PB/Al composite coatings were studied by using adhesion test and impact strength test. The results indicate that PB/Al powder decreases not only the gloss of the coating, but also its emissivity within the wavelength range of 8-14 mu m. The composite coatings have good adherence and impact strength at PB/Al content below 50 wt.%, and then the mechanical properties decrease in the PB/Al content range from 50 wt.% to 60 wt%. By comparing PB/Alcomposite coating and Al powder tinting coating with the same color and surface gloss, PB/Alcomposite coating exhibits significant lower infrared emissivity, which is attributed to closer inter-powder distances of metallic fillers and higher electrical conductivity in the coating. (C) 2014 Elsevier By. All rights reserved.
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