摘要
采用高速电火花线切割机床在铜表面构筑复合粗糙结构,经自组装技术处理后得到了超疏水铜表面。结果表明,高速电火花线切割机床在铜表面构筑陨石坑-突起-鳞片-气孔-颗粒复合粗糙结构,该复合结构形成了"气垫"效应,实现了超疏水功能,表面静态接触角达153.73°,滚动角为2.33°。研究了脉冲宽度对表面疏水性能的影响,结果表明,脉冲宽度对铜表面复合粗糙结构的形貌和水滴在表面的接触状态都有十分重要的影响。随着脉冲宽度的增加,铜表面陨石坑直径随之增大,陨石坑深度减小,单位面积内的突起物数量随之减少。微观结构的变化导致水滴在铜表面的接触状态由Cassie模型向Wenzel模型转变。胶带剥离试验表明超疏水铜表面具有良好的耐用性,剥离后的试件具有良好的可修复性和时间稳定性。
Super-hydrophobic copper surfaces covered with the composite rough structures were fabricated by the high speed wire cut electrical discharge machining（HS-WEDM）combined with self-assembly techniques.Results show that the crater-bump-scale-porosity-particle composite rough structures of resulting copper surface,fabricated by HS-WEDM,form the air cushion effect,and realize the high static contact angle of about 153.73°and low rolling angle of about 2.33°.Effect of pulse width on the hydrophobicity of resulting copper surfaces was investigated.Results indicate that the pulse width plays an important role in the microstructure of the composite rough structures and the contact state of water droplet on the resulting copper surface.With the increase of pulse width,the diameter of crater on the resulting surface gradually increase,the depth of crater reduces,and the number of bumps in unit area decreases.With the change of microstructure,the contact state of water droplet on the resulting copper surfaces changes from Cassie model to Wenzel model.Adhesive tape peeling tests show that the super-hydrophobic copper surfaces have good durability.The fabricated super-hydrophobic copper surfaces also have good stability and reparability.
出处
《材料科学与工程学报》
CAS
CSCD
北大核心
2014年第5期634-637,642,共5页
Journal of Materials Science and Engineering
基金
国家自然科学基金资助项目(51275056)
吉林省科技发展计划资助项目(201201123)
长春理工大学青年科研基金资助项目(202000490)
