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Robust, Superhydrophobic Aluminum Fins with Excellent Mechanical Durability and Self-Cleaning Ability

The self-cleaning ability of superhydrophobic metal surfaces has attracted extensive attention. The preparation of superhydrophobic material using the coating method is a common processing method. In this experiment, aluminum fins were processed by laser etching and perfluorinated two-step coating....

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Autores principales: Su, Wenbo, Lu, Xiangyou, Shu, Yunxiang, Liu, Xianshuang, Gao, Wen, Yao, Jianjie, Niu, Zhuang, Xie, Yuanlai
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10051178/
https://www.ncbi.nlm.nih.gov/pubmed/36985111
http://dx.doi.org/10.3390/mi14030704
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author Su, Wenbo
Lu, Xiangyou
Shu, Yunxiang
Liu, Xianshuang
Gao, Wen
Yao, Jianjie
Niu, Zhuang
Xie, Yuanlai
author_facet Su, Wenbo
Lu, Xiangyou
Shu, Yunxiang
Liu, Xianshuang
Gao, Wen
Yao, Jianjie
Niu, Zhuang
Xie, Yuanlai
author_sort Su, Wenbo
collection PubMed
description The self-cleaning ability of superhydrophobic metal surfaces has attracted extensive attention. The preparation of superhydrophobic material using the coating method is a common processing method. In this experiment, aluminum fins were processed by laser etching and perfluorinated two-step coating. The aluminum surface was modified using a femtosecond laser and 1H,1H,2H,2H- perfluorooctane triethoxysilane (PFOTES). A superhydrophobic aluminum surface with excellent mechanical stability and self-cleaning properties was obtained with the superhydrophobic contact angle (WCA) of 152.8° and the rolling angle (SA) of 0.6°. The results show that the superhydrophobic surface has an excellent cleaning effect compared with an ordinary surface in unit time. Then, a wear resistance test of the superhydrophobic surface was carried out by using the physical wear method. The results show that physical wear had a low influence on the hydrophobic property of the specimen surface. Finally, the Vickers hardness analysis found that the superhydrophobic surface hardness was significantly better than the ordinary surface hardness compared with the superhydrophobic surface hardness. Based on the excellent self-cleaning properties, wear resistance, and robustness of superhydrophobic materials, the laser-etched and perfluorinated superhydrophobic aluminum fins designed and manufactured in this study have broad application prospects in improving the heat transfer efficiency of finned heat exchangers.
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spelling pubmed-100511782023-03-30 Robust, Superhydrophobic Aluminum Fins with Excellent Mechanical Durability and Self-Cleaning Ability Su, Wenbo Lu, Xiangyou Shu, Yunxiang Liu, Xianshuang Gao, Wen Yao, Jianjie Niu, Zhuang Xie, Yuanlai Micromachines (Basel) Article The self-cleaning ability of superhydrophobic metal surfaces has attracted extensive attention. The preparation of superhydrophobic material using the coating method is a common processing method. In this experiment, aluminum fins were processed by laser etching and perfluorinated two-step coating. The aluminum surface was modified using a femtosecond laser and 1H,1H,2H,2H- perfluorooctane triethoxysilane (PFOTES). A superhydrophobic aluminum surface with excellent mechanical stability and self-cleaning properties was obtained with the superhydrophobic contact angle (WCA) of 152.8° and the rolling angle (SA) of 0.6°. The results show that the superhydrophobic surface has an excellent cleaning effect compared with an ordinary surface in unit time. Then, a wear resistance test of the superhydrophobic surface was carried out by using the physical wear method. The results show that physical wear had a low influence on the hydrophobic property of the specimen surface. Finally, the Vickers hardness analysis found that the superhydrophobic surface hardness was significantly better than the ordinary surface hardness compared with the superhydrophobic surface hardness. Based on the excellent self-cleaning properties, wear resistance, and robustness of superhydrophobic materials, the laser-etched and perfluorinated superhydrophobic aluminum fins designed and manufactured in this study have broad application prospects in improving the heat transfer efficiency of finned heat exchangers. MDPI 2023-03-22 /pmc/articles/PMC10051178/ /pubmed/36985111 http://dx.doi.org/10.3390/mi14030704 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Su, Wenbo
Lu, Xiangyou
Shu, Yunxiang
Liu, Xianshuang
Gao, Wen
Yao, Jianjie
Niu, Zhuang
Xie, Yuanlai
Robust, Superhydrophobic Aluminum Fins with Excellent Mechanical Durability and Self-Cleaning Ability
title Robust, Superhydrophobic Aluminum Fins with Excellent Mechanical Durability and Self-Cleaning Ability
title_full Robust, Superhydrophobic Aluminum Fins with Excellent Mechanical Durability and Self-Cleaning Ability
title_fullStr Robust, Superhydrophobic Aluminum Fins with Excellent Mechanical Durability and Self-Cleaning Ability
title_full_unstemmed Robust, Superhydrophobic Aluminum Fins with Excellent Mechanical Durability and Self-Cleaning Ability
title_short Robust, Superhydrophobic Aluminum Fins with Excellent Mechanical Durability and Self-Cleaning Ability
title_sort robust, superhydrophobic aluminum fins with excellent mechanical durability and self-cleaning ability
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10051178/
https://www.ncbi.nlm.nih.gov/pubmed/36985111
http://dx.doi.org/10.3390/mi14030704
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