激光熔覆氧化铝涂层的管式铜网油水分离性能研究  

Laser Cladding of Alumina Coating on Copper Mesh for Enhanced Tubular Oil-water Separation Performance

作　　者：赖俊金 周锐 颜黄苹 崔景芹[3] 陈哲堃 LAI Junjin;ZHOU Rui;YAN Huangping;CUI Jingqin;CHEN Zhekun(School of Aerospace Engineering,Xiamen University,Xiamen,Fujian 361102,China;Innovational Labroratory for Sciences and Technologies of Energy Materials of Fujian Province(IKKEM),Xiamen,Fujian 361005,China;Pen-Tung Sah Institute of Micro-Nano Science and Technology,Xiamen University,Xiamen,Fujian 361005,China)

机构地区：[1]厦门大学航空航天学院,福建厦门361102 [2]福建省能源材料科学与技术创新实验室(IKKEM),福建厦门361005 [3]厦门大学萨本栋微米纳米研究院,福建厦门361005

出　　处：《光子学报》2021年第11期49-62,共14页Acta Photonica Sinica

基　　金：国家自然科学基金(No.62175203);福建省科技计划(No.2020H0006);广东省自然科学基金(No.2020A1515010519)。

摘　　要：采用一种操作简单且成本低的激光熔覆方法将氧化铝涂层一步熔覆到柔性铜网表面,在铜网表面上形成不同粗糙度的纳米级颗粒状结构修饰层,调控表面润湿特性。引入瞬态热分析法探索由扫描路径间距减小引起的温度场变化情况。研究发现,当激光熔覆过程的扫描路径间距为10μm时,分离网表面铝涂层呈现α-Al_(2)O_(3)晶型,耐久性良好,在空气中水的接触角接近0°,水下油的接触角大于160°,经循环测试后分离效率仍超95%。针对微流体管道应用中的油水分离需求,对分离膜柔性基底卷曲成型的管道进行油水分离测试和流体行为仿真研究,利用计算流体力学法分析如何通过调控表面纳米颗粒的分布来调节管道内部压强场和速度场的分布,从而促进管道内流体平稳流动而增强油水分离性能。An easy-to-use and low-cost method was used to clad an alumina coating onto the surface of a flexible copper mesh in one-step laser treatment,fabricating a modified layer of nanostructures with different roughness on the surface of the mesh to regulate the surface wettability.Transient thermal analysis was introduced to investigate the change of temperature distribution field caused by the reduction of the scan path spacing.It is found that the cladded aluminum coating on the surface of the copper mesh fabricated by the laser scanning path spacing at 10μm exhibits anα-Al_(2)O_(3) crystalline form with good durability and separation efficiency exceeding 95%after cyclic testing,delivering water contact angle close to 0°in the air and oil contact angle larger than 160°underwater.To address the oil/water separation needs in microfluidic channel applications,oil-water separation tests and simulations of fluid mechanics were carried out for the pipeline formed by curling the flexible substrate of the separation membrane.Computational fluid dynamics was used to analyze how to regulate the distribution of surface nanoparticles,leading to the redistribution of pressure and velocity fields inside the pipeline,thereby promoting the smooth flow of fluid inside the pipeline and enhancing the oil-water separation performance.

关 键 词：激光熔覆 纳米微结构 表面粗糙度 温度场分布 流体力学 

分 类 号：TG178[金属学及工艺—金属表面处理]