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借助阳极氧化法和氟化处理技术对铝表面进行改性。以Na3PO4水溶液为电解液在铝表面加工出粗糙蜂窝状结构,再以具有低表面能的氟硅烷为改性剂对铝表面的粗糙结构进行改性。结合扫描电子显微镜、能谱仪、接触角测量仪、Vickers显微硬度(HV)测量仪和三维表面轮廓仪对加工后的铝表面进行表征。结果表明:当加工时间为8 min时,铝表面获得了粗糙蜂窝状结构,其超疏水性较好,水滴与表面的接触角达到168.1°,滚动角为1°;当加工时间为13 min时,加工后的铝表面的粗糙度(轮廓算术平均偏差Ra)仅为0.409μm,且表面HV高达3 840 MPa。该方法所制备的超疏水表面具有超疏水性能好、表面硬度高和耐磨性好等优点。
Aluminum surface modification with anodization and fluorination techniques. The coarse honeycomb structure was fabricated on the surface of aluminum by using Na3PO4 as electrolyte, and the surface roughness of aluminum was modified by using silane with low surface energy as modifier. The processed aluminum surface was characterized by scanning electron microscopy, energy dispersive spectroscopy, contact angle measurement, Vickers hardness tester and three-dimensional surface profilometer. The results showed that when the processing time was 8 min, the surface of the aluminum was rough honeycomb structure, and its superhydrophobicity was better. The contact angle of the water droplets with the surface reached 168.1 ° and the rolling angle was 1 °. When the processing time was 13 min , The roughness of the machined aluminum surface (profile arithmetic mean deviation Ra) is only 0.409 μm, and the surface HV is as high as 3 840 MPa. The superhydrophobic surface prepared by the method has the advantages of good superhydrophobic property, high surface hardness and good abrasion resistance.