Laser textured superhydrophobic surfaces and their applications for homogeneous spot deposition
Laser textured superhydrophobic surfaces and their applications for homogeneous spot deposition
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DOI：
10.1016/j.apsusc.2016.01.019
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发表时间：
2016-03-01
影响因子：
6.7
通讯作者：
Shephard, Jonathan D.
中科院分区：
文献类型：
--
作者：
Van Duong Ta;Dunn, Andrew;Shephard, Jonathan D.
本工作报告了304 S15不锈钢的激光表面改性，以开发超疏水性能和随后的均匀点沉积的应用。采用激光直接毛化技术制备了稳定接触角约为154 °、接触角滞后约为4 °的超疏水表面。与用于这种图案化的普通皮科/飞秒激光器相比，在这项工作中使用的纳秒光纤激光器更具成本效益，紧凑，并允许更高的加工速率。研究了激光功率和扫描线间距对织构表面润湿性的影响，并给出了优化的工艺参数。研究了聚苯乙烯（PS）纳米粒子悬浮液滴在处理过的表面和未处理过的润湿基底上的流体流动和输运。蒸发完成后，在无纹理基底上观察到咖啡污渍效应，但在超疏水表面上没有观察到咖啡污渍效应。实现了PS颗粒在激光纹理化表面上的均匀沉积，并且沉积的材料被限制在较小的区域。(C)2016作者由爱思唯尔公司出版
This work reports the laser surface modification of 304S15 stainless steel to develop superhydrophobic properties and the subsequent application for homogeneous spot deposition. Superhydrophobic surfaces, with steady contact angle of similar to 154 degrees and contact angle hysteresis of similar to 4 degrees, are fabricated by direct laser texturing. In comparison with common pico-/femto-second lasers employed for this patterning, the nanosecond fiber laser used in this work is more cost-effective, compact and allows higher processing rates. The effect of laser power and scan line separation on surface wettability of textured surfaces are investigated and optimized fabrication parameters are given. Fluid flows and transportations of polystyrene (PS) nanoparticles suspension droplets on the processed surfaces and unprocessed wetting substrates are investigated. After evaporation is complete, the coffee-stain effect is observed on the untextured substrates but not on the superhydrophobic surfaces. Uniform deposition of PS particles on the laser textured surfaces is achieved and the deposited material is confined to smaller area. (C) 2016 The Authors. Published by Elsevier B.V.