Stainless steel anisotropic superhydrophobic surfaces fabrication with inclined cone array via laser ablation and post annealing treatment  

基于激光烧蚀和后退火处理的斜锥结构阵列各向异性不锈钢超疏水表面制备

作　　者：ZHAO Yi-zhe HONG Ming-hui 赵怿哲;洪明辉(Department of Electrical and Computer Engineering,National University of Singapore,4 Engineering Drive 3,117576,Singapore)

机构地区：[1]Department of Electrical and Computer Engineering,National University of Singapore,4 Engineering Drive 3,117576,Singapore

出　　处：《Journal of Central South University》2022年第10期3261-3269,共9页中南大学学报（英文版）

基　　金：Project(A19C2a0019) supported by the Advanced Remanufacturing and Technology Centre (ARTC) under its RIE2020 Advanced Manufacturing and Engineering (AME) IAF PP,Singapore。

摘　　要：Metal superhydrophobic surfaces with anisotropic wettability and adhesion have become more and more important due to their promising applications. Herein, we report a new fabrication strategy through a combination of pulsed laser ablation and low-temperature annealing post-processing. An inclined cone structure array is made on stainless steel surfaces, and then 120 °C low-temperature annealing is applied. Such surface displays excellent mechanical durability and anisotropic superhydrophobicity. It is demonstrated experimentally that the contact angle of water droplets on the surface is different along the parallel(167° ±2°) and perpendicular directions(157° ±2°) of the inclined cone structure. The sliding behaviors of water droplets and mechanical durability of the inclined cone structures are studied. These surfaces obtained in a short time with environmentally friendly fabrication can be applied in industries for water harvesting, droplet manipulation, and pipeline transportation.如今,具有各向异性浸润性和粘附性的金属超疏水表面由于其广阔的应用前景变得越发重要。本文提出了一种结合了脉冲激光烧蚀和低温退火后处理的新型制备策略。通过激光烧蚀在不锈钢表面制备出斜锥结构阵列,然后进行120°C低温退火处理。得到的表面表现出优异的机械耐久性和各向异性超疏水性。实验证明,水滴在制备表面的接触角沿其斜锥结构的平行方向(167°±2°)和垂直方向(157°±2°)是不同的。此外,还表征了斜锥结构表面的水滴滑动各向异性和机械耐久性,性能均符合预期。本文中可以快速制备且对环境友好的超疏水表面可广泛用于集水、液滴处理和管道运输等实际应用中。

关 键 词：superhydrophobic anisotropy laser precision engineering micro/nano-structure bio-inspired surface 

分 类 号：TG174.4[金属学及工艺—金属表面处理] TG665[金属学及工艺—金属学] TG156.2