Preparation and Properties of EPDM-Based Composite Coatings with Low Infrared Emissivity
Publication: Journal of Energy Engineering
Volume 142, Issue 4
Abstract
Low-infrared-emissivity coatings were prepared using metallic particles (including Cu, Al, Ni, Ag, etc.) and an ethylene-propylene-diene monomer (EPDM) binder. The effects of size, shape, morphology, and content of metallic particles on infrared emissivity of the coatings were systematically investigated. The principles of the low-infrared-emissivity and low-solar-reflectance coatings are discussed in terms of reflection, emissions, and chemical structure. The thermal insulation performance of composite coatings is studied via a simulation model. Mechanical properties of composite coatings are studied by using circle-cut test and impact strength test. The composite coatings are also tested for corrosion behavior with potentiodynamic polarization. The results indicate that when the Cu particles and Al particles are flaky and high-leafing, they have the minimum coating emissivity, exhibiting infrared emissivity values of 0.33–0.40 and solar reflectance values of 0.38–0.53. The formation of low-infrared-emissivity coatings depends highly on the size and shape of the metallic particles. A simulation model is proposed to account for thermal insulation properties of the coatings, which indicates that an EPDM/Cu-powder coating achieves good thermal insulation performance, with a 4°C relative temperature drop. The low-infrared-emissivity composite coatings also show excellent corrosion resistance and mechanical performance.
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Acknowledgments
The authors gratefully acknowledge the support of the 12th Five-Year National Science and Technology Support Plan (Number: 2011BAJ04B05), the Natural Science Foundation of China (Number 51378391), and the China Scholarship Council (awarded to Yan He for studying at the University of Toronto).
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Information & Authors
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Published In
Journal of Energy Engineering
Volume 142 • Issue 4 • December 2016
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Jun 12, 2015
Accepted: Nov 30, 2015
Published online: Feb 22, 2016
Discussion open until: Jul 22, 2016
Published in print: Dec 1, 2016
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