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테플론 코팅과 오일 담지를 이용한 알루미늄 양극산화피막의 응축 열전달 향상
강민주(Minjoo Kang),이종훈(Jonghoon Lee),차수진(Soojin Cha),신예지(Yeaji Shin),김동현(Donghyun Kim),김경자(Kyung-Ja Kim),이정훈(Junghoon Lee) 한국표면공학회 2021 한국표면공학회지 Vol.54 No.2
Surface modification technique enabling the control of condensation provides various benefit in various engineering systems, such as heat transfer, desalination, power plants, and so on. In this study, lubricant oil-impregnation into Teflon-coated nanoporous anodic oxide layer of aluminum to enhance a de-wetting and mobility of water droplet on surface. Due to the surface treatment improving water-repellency, the condensation mode is changed to dropwise, thus the frequency of sliding condensed water droplet on surface is increased. For these reasons, the surface of oil-impregnated Teflon-coated nanoporous anodic aluminum oxide shows significantly enhanced condensation heat transfer compared to bare aluminum surface. In addition, the porosity of anodic aluminum oxide affected the mobility of water droplet even with oil-impregnation and Teflon-coating, indicating that the optimization of porous structure of anodic oxide is required for maximizing the condensation heat transfer.