Fabrication of superhydrophobic and ice-repellent surfaces on pure aluminium using single and multiscaled periodic textures
Fabrication of superhydrophobic and ice-repellent surfaces on pure aluminium using single and multiscaled periodic textures
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DOI：
10.1038/s41598-019-49615-x
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发表时间：
2019-09-26
影响因子：
4.6
通讯作者：
Lasagni, Andres F.
中科院分区：
文献类型：
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作者：
Milles, Stephan;Soldera, Marcos;Lasagni, Andres F.
制造具有超疏水和防冰性能的铝表面目前是一项具有挑战性的任务。在这项工作中，多功能结构的制造直接激光写入和直接激光干涉图案化方法，使用脉冲红外激光辐射（1064 nm）。产生特征尺寸范围从7.0到50.0 μ m的不同周期性图案。此外，结合上述两种基于激光的方法产生分层纹理。室温下的水接触角测试表明，所有产生的图案在13至16天后达到超疏水状态。此外，在-30 ° C至80 ° C的衬底温度下重复这些实验，从而允许确定作为温度的函数的三种润湿性行为。图案化的表面还显示出斥冰特性，其特征在于与未处理的样品相比，液滴冻结时间增加了近三倍。使用有限元模拟，人们发现，背后的主要原因是冰的防止液滴的几何形状的变化，由于处理过的表面的疏水性。最后，液滴冲击冷却至-20 ° C的经处理的铝表面的动态测试显示，仅在分层图案化的表面上，液滴能够从基板反弹。
Fabricating aluminium surfaces with superhydrophobic and ice-repellent properties present nowadays a challenging task. In this work, multifunctional structures are manufactured by direct laser writing and direct laser interference patterning methods using pulsed infrared laser radiation (1064 nm). Different periodic patterns with feature sizes ranging from 7.0 to 50.0pm are produced. In addition, hierarchical textures are produced combining both mentioned laser based methods. Water contact angle tests at room temperature showed that all produced patterns reached the superhydrophobic state after 13 to 16 days. In addition, these experiments were repeated at substrate temperatures from -30 degrees C to 80 degrees C allowing to determine three wettability behaviours as a function of the temperature. The patterned surfaces also showed ice-repellent properties characterized by a near three-fold increase in the droplets freezing times compared to the untreated samples. Using finite element simulations, it was found that the main reason behind the ice-prevention is the change in the droplet geometrical shape due to the hydrophobic nature of the treated surfaces. Finally, dynamic tests of droplets imping the treated aluminium surfaces cooled down to -20 degrees C revealed that only on the hierarchically patterned surface, the droplets were able to bounce off the substrate.