飞秒激光制备航空用铝靶材表面润湿功能微纳结构的研究

近年来,飞行器润湿功能外壳防冰技术以其不消耗能源、几乎不增加额外体积和质量等优点备受世界各国科学家及工程师的关注.铝合金材料一直广泛的应用于民用飞行器,特别是飞机外壳和骨架,然而原有外壳材料表面润湿特性表现中庸.通过飞秒激光微纳结构制备技术,可以有效改变其表面的润湿特性.利用飞秒激光在不同实验条件下,制备了两种典型的微纳复合结构,实验结果表明,柱型微纳结构以独特的双尺寸复合结构所提供的空气气模实现了表面超疏水特性.而沟槽型微纳结构以开放腔毛细管效应为原动力,使其展现了超亲水特性,并具备定向输水功能.这些润湿功能的实现对航空飞行器防冰技术的发展有着重要的应用意义.

Femtosecond Laser Fabricate Wetting FunctionMicro-and Nanostructure on Aerial Aluminum Alloys Surface

Over the years,aircraft's wetting function surface anti-icing technology receives much concern because of its many advantages such as not consuming energy and almost no additional volume and quality. Aluminum alloy has been used in civil aircraft widely, especially in shell and skeleton of aircraft. However, the wetting characteristics of original shell's surface don't have an excellent performance. It can effectively change the wetting properties of the surface by femtosecond laser-induced micro- and nanostructures preparation technology. In this paper, we prepared two kinds of typical micro- and nano-multiple structures. Experimental results show that, columnar micro- and nanostructures can achieve the super-hydrophobic surface property caused by the air provided by special double size multi-structure. More-over, trench like micro- and nanostructures make the surface show the super-hydrophilic properties powered by the open cavity capillary effect, and have orientation water delivery function. The realization of these wetting functions has important significance in application for the development of spacecraft anti-icing technology.