基于复合结构的耐磨超疏水表面制备

Preparation of Wear-Resistant Superhydrophobic Surface Based on Composite Structure

超疏水表面在自清洁防尘、防腐蚀、防覆冰方面具有极大应用价值,但其粗糙结构的机械易损伤性影响了应用价值。本研究成功制备了一种机械性能稳健的超疏水铝表面。先采用纳秒激光在铝表面烧蚀微米级结构,再将聚苯乙烯(PS)、疏水性纳米SiO_(2)颗粒依次浸渍在铝表面,制备得到超疏水铝表面。研究表明,超疏水表面具有多尺度分级形貌,在微米级粗糙结构中有间隔为100μm的微米级突出结构。该超疏水表面的最大接触角(CA)为160°,滚动角(SA)小于5°,并经50次磨损测试后仍保持疏水性。与无微米级结构的超疏水铝表面相比,其耐磨损性能优异,证明微米级结构对纳米级疏水颗粒具有重要的保护作用。本研究提供了一个制备多重结构机械稳健的超疏水表面的框架,其研究结果为制备机械稳健的超疏水表面提供了新的思路。

In this study,a mechanically stable superhydrophobic aluminum surface was successfully prepared.Firstly,nanosecond laser was used to ablate micron-scale structures on the aluminum surface,followed by the immersion of polystyrene(PS)and hydrophobic nano-sized SiO_(2) particles.Then a superhydrophobic aluminum surface was obtained.The study showed that the superhydrophobic surface had a multi-scale hierarchical morphology,with micron-scale protrusions of 100μm spacing within the micron-scale rough structure.The maximum contact angle(CA)of this superhydrophobic surface was 160°,with a sliding angle(SA)of less than 5°.And after the wear test,it remained hydrophobic after 50 times of wear.Compared to superhydrophobic samples without micron-scale structures,it exhibited excellent wear-resistance,confirming the important role of micron-scale structures in protecting the nano-sized hydrophobic particles.This study provided a framework for preparing mechanically robust superhydrophobic surfaces with multiple structures,offering new ideas for the fabrication of mechanically stable superhydrophobic surfaces.