磁粉电火花毛化制备铝基超疏水表面

Fabrication of Super-Hydrophobic Aluminum Base Surface by MAEDM

采用磁粉电火花放电技术在铝合金表面构筑微纳复合结构,通过低表面能物质修饰得到超疏水表面,其静态接触角达到156.5°,滚动角为3°。结果表明,磁粉电火花放电在铝合金表面构筑了致密的大小不等的陨石坑-凸起-气孔-颗粒复合粗糙结构,形成了"气垫"效应,实现了超疏水功能。研究表明毛化时间和峰值电流都会影响表面微纳复合结构的尺度大小和疏密从而影响表面疏水性。最后通过剥离实验验证其具有良好的耐用性。由于磁粉电极的柔性,此技术还适用于毛化形状复杂的表面,应用范围广。

The micro-nanocomposite rough structure was constructed on the surface of aluminum alloy by magnetic powder electrical discharge texturing （MP-EDT）, and the super-hydrophobie surface was obtained after modification with low surface energy. The static contact angle was 156.58 ~ and the rolling angle was 3 o The results show that under the condition of certain parameters, the magnetic powder EDT on the surface of the aluminum alloy eonstured the size of the crater-bump-porosity-rough granular composite structure. The composite structure formed a ＂air cushion＂ effect, to achieve a super-hydrophobic function. The results show that the peak current and the time will affect the size of the surface micro-nanocomposite structure and density and thus affect the surface hydrophobieity. Finally, the durability of the super-hydrophobie surface was tested by the stripping experiment. The results show that the super-hydrophobic surface prepared by this method has good durability and stability. Due to the magnetic particle electrode is flexible, so this technology is applicable to roughen modalities and surface structure. Expand the application range of electrical discharge texturing technology.