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Evolution of a Superhydrophobic H59 Brass Surface by Using Laser Texturing via Post Thermal Annealing

To fabricate an industrial and highly efficient super-hydrophobic brass surface, annealed H59 brass samples have here been textured by using a 1064 nm wavelength nanosecond fiber laser. The effects of different laser parameters (such as laser fluence, scanning speed, and repetition frequency), on th...

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Detalles Bibliográficos
Autores principales: Lu, Xizhao, Kang, Lei, Yan, Binggong, Lei, Tingping, Zheng, Gaofeng, Xie, Haihe, Sun, Jingjing, Jiang, Kaiyong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7760971/
https://www.ncbi.nlm.nih.gov/pubmed/33260379
http://dx.doi.org/10.3390/mi11121057
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author Lu, Xizhao
Kang, Lei
Yan, Binggong
Lei, Tingping
Zheng, Gaofeng
Xie, Haihe
Sun, Jingjing
Jiang, Kaiyong
author_facet Lu, Xizhao
Kang, Lei
Yan, Binggong
Lei, Tingping
Zheng, Gaofeng
Xie, Haihe
Sun, Jingjing
Jiang, Kaiyong
author_sort Lu, Xizhao
collection PubMed
description To fabricate an industrial and highly efficient super-hydrophobic brass surface, annealed H59 brass samples have here been textured by using a 1064 nm wavelength nanosecond fiber laser. The effects of different laser parameters (such as laser fluence, scanning speed, and repetition frequency), on the translation to super-hydrophobic surfaces, have been of special interest to study. As a result of these studies, hydrophobic properties, with larger water contact angles (WCA), were observed to appear faster than for samples that had not been heat-treated (after an evolution time of 4 days). This wettability transition, as well as the evolution of surface texture and nanograins, were caused by thermal annealing treatments, in combination with laser texturing. At first, the H59 brass samples were annealed in a Muffle furnace at temperatures of 350 °C, 600 °C, and 800 °C. As a result of these treatments, there were rapid formations of coarse surface morphologies, containing particles of both micro/nano-level dimensions, as well as enlarged distances between the laser-induced grooves. A large number of nanograins were formed on the brass metal surfaces, onto which an increased number of exceedingly small nanoparticles were attached. This combination of fine nanoparticles, with a scattered distribution of nanograins, created a hierarchic Lotus leaf-like morphology containing both micro-and nanostructured material (i.e., micro/nanostructured material). Furthermore, the distances between the nano-clusters and the size of nano-grains were observed, analyzed, and strongly coupled to the wettability transition time. Hence, the formation and evolution of functional groups on the brass surfaces were influenced by the micro/nanostructure formations on the surfaces. As a direct consequence, the surface energies became reduced, which affected the speed of the wettability transition—which became enhanced. The micro/nanostructures on the H59 brass surfaces were analyzed by using Field Emission Scanning Electron Microscopy (FESEM). The chemical compositions of these surfaces were characterized by using an Energy Dispersive Analysis System (EDS). In addition to the wettability, the surface energy was thereby analyzed with respect to the different surface micro/nanostructures as well as to the roughness characteristics. This study has provided a facile method (with an experimental proof thereof) by which it is possible to construct textured H59 brass surfaces with tunable wetting behaviors. It is also expected that these results will effectively extend the industrial applications of brass material.
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spelling pubmed-77609712020-12-26 Evolution of a Superhydrophobic H59 Brass Surface by Using Laser Texturing via Post Thermal Annealing Lu, Xizhao Kang, Lei Yan, Binggong Lei, Tingping Zheng, Gaofeng Xie, Haihe Sun, Jingjing Jiang, Kaiyong Micromachines (Basel) Article To fabricate an industrial and highly efficient super-hydrophobic brass surface, annealed H59 brass samples have here been textured by using a 1064 nm wavelength nanosecond fiber laser. The effects of different laser parameters (such as laser fluence, scanning speed, and repetition frequency), on the translation to super-hydrophobic surfaces, have been of special interest to study. As a result of these studies, hydrophobic properties, with larger water contact angles (WCA), were observed to appear faster than for samples that had not been heat-treated (after an evolution time of 4 days). This wettability transition, as well as the evolution of surface texture and nanograins, were caused by thermal annealing treatments, in combination with laser texturing. At first, the H59 brass samples were annealed in a Muffle furnace at temperatures of 350 °C, 600 °C, and 800 °C. As a result of these treatments, there were rapid formations of coarse surface morphologies, containing particles of both micro/nano-level dimensions, as well as enlarged distances between the laser-induced grooves. A large number of nanograins were formed on the brass metal surfaces, onto which an increased number of exceedingly small nanoparticles were attached. This combination of fine nanoparticles, with a scattered distribution of nanograins, created a hierarchic Lotus leaf-like morphology containing both micro-and nanostructured material (i.e., micro/nanostructured material). Furthermore, the distances between the nano-clusters and the size of nano-grains were observed, analyzed, and strongly coupled to the wettability transition time. Hence, the formation and evolution of functional groups on the brass surfaces were influenced by the micro/nanostructure formations on the surfaces. As a direct consequence, the surface energies became reduced, which affected the speed of the wettability transition—which became enhanced. The micro/nanostructures on the H59 brass surfaces were analyzed by using Field Emission Scanning Electron Microscopy (FESEM). The chemical compositions of these surfaces were characterized by using an Energy Dispersive Analysis System (EDS). In addition to the wettability, the surface energy was thereby analyzed with respect to the different surface micro/nanostructures as well as to the roughness characteristics. This study has provided a facile method (with an experimental proof thereof) by which it is possible to construct textured H59 brass surfaces with tunable wetting behaviors. It is also expected that these results will effectively extend the industrial applications of brass material. MDPI 2020-11-29 /pmc/articles/PMC7760971/ /pubmed/33260379 http://dx.doi.org/10.3390/mi11121057 Text en © 2020 by the authors. 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 (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Lu, Xizhao
Kang, Lei
Yan, Binggong
Lei, Tingping
Zheng, Gaofeng
Xie, Haihe
Sun, Jingjing
Jiang, Kaiyong
Evolution of a Superhydrophobic H59 Brass Surface by Using Laser Texturing via Post Thermal Annealing
title Evolution of a Superhydrophobic H59 Brass Surface by Using Laser Texturing via Post Thermal Annealing
title_full Evolution of a Superhydrophobic H59 Brass Surface by Using Laser Texturing via Post Thermal Annealing
title_fullStr Evolution of a Superhydrophobic H59 Brass Surface by Using Laser Texturing via Post Thermal Annealing
title_full_unstemmed Evolution of a Superhydrophobic H59 Brass Surface by Using Laser Texturing via Post Thermal Annealing
title_short Evolution of a Superhydrophobic H59 Brass Surface by Using Laser Texturing via Post Thermal Annealing
title_sort evolution of a superhydrophobic h59 brass surface by using laser texturing via post thermal annealing
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7760971/
https://www.ncbi.nlm.nih.gov/pubmed/33260379
http://dx.doi.org/10.3390/mi11121057
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