Experimental and numerical investigations on curing a polyester-based powder coating by catalytic infrared radiation

Yuan, Yindong and Pan, Song and Wang, Tongzhao and Xia, Liang and Liu, Yiqiao and Wang, Xinru and Li, Lei and Wang, Tian (2023) Experimental and numerical investigations on curing a polyester-based powder coating by catalytic infrared radiation. Applied Sciences-Basel, 13 (4). ISSN 2076-3417, DOI https://doi.org/10.3390/app13042187.

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Catalytic combustion can effectively and cleanly convert the chemical energy of fossil fuels into infrared radiation energy. However, there is little research on the use of this technology to cure powder coatings. Therefore, catalytic infrared heating equipment based on a Pt/Al2O3 noble metal catalyst was designed, constructed, and tested in this study. The optimal curing parameters for the catalytic infrared curing process for powder coatings were determined via experiments at 220 degrees C for 3 min and 230 degrees C for 2 min. As the curing temperature increased and the curing time increased, the mechanical properties of the coating were found to improve. However, the gloss of the coating was reduced and the color darkened. A one-dimensional heat transfer model was developed to investigate the heat transfer process for powder coatings. This study introduced an internal heat source for the first time, and the heat transfer process for polyester-based powder coatings with different substrate thicknesses was numerically simulated. The numerical simulations demonstrated that the efficiency of the heat transfer between the catalytic infrared gas supply and the coating surface was 0.4. When the substrate thickness was 1 mm, the coating was most rapidly cured at 230 degrees C. When the substrate thickness was >= 2 mm, the most rapid curing occurred at 220 degrees C.

Item Type: Article
Funders: Key Laboratory for Comprehensive Energy Saving of Cold Regions Architecture of the Ministry of Education, International Science and Technology Cooperation Center in Hebei Province (Grant No: 20594501D)
Uncontrolled Keywords: Catalytic infrared; Heat efficiency; Heat transfer model; Powder coating curing
Subjects: Q Science > QD Chemistry
T Technology > TJ Mechanical engineering and machinery
Divisions: Faculty of Engineering > Department of Mechanical Engineering
Depositing User: Ms Zaharah Ramly
Date Deposited: 01 Dec 2023 02:22
Last Modified: 01 Dec 2023 02:22
URI: http://eprints.um.edu.my/id/eprint/38750

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