摘要
采用化学刻蚀法,在铝基的表面构建了纳米-微米混合的粗糙结构。化学刻蚀后的粗糙表面经过氟硅烷(FAS)修饰,形成了接触角大于155°的超疏水表面。在过冷环境中,利用加湿器提供微小雾滴进行了铝棒和铝片表面的结霜实验。实验过程中对比了超疏水铝表面、疏水铝表面和普通铝表面上的结霜量。结果表明,超疏水铝表面在抑制结霜方面优于普通铝表面,接触角的大小对抑制结霜也有很大影响,接触角越大抑制效果越明显,并且超疏水铝表面的疏水性能易于恢复。在现实生活中,超疏水表面对于降低输电线缆表面的覆霜积聚速率和重量有重要的意义。
Micro-Nanostructure on aluminum surface was configurated via chemical etching. After fluorination treating, the etched aluminum surface exhibits super-hydrophobic properties with a water contact angle of 155°. In the sub-cooling environment, the frosting experiments were carried out on the surface of aluminum rods and aluminum sheets using humidifier to supply the micro water droplets. The comparisons of the quantities of frost formed on the super-hydrophobic, hydrophobic and common aluminum surfaces were conducted. The results show that the super-hydrophobic aluminum surface is better than common aluminum surface in resisting frosting. Besides, the water contact angle of the surface has great effect on resiting frosting. The surface with bigger water contact angle will have stronger defrosting behavior. Therefore, the super-hydrophobic surfaces are significant for applying them to decrease the accumulating rate and total weight of frosting on the power transmission lines.
出处
《高校化学工程学报》
EI
CAS
CSCD
北大核心
2012年第6期929-933,共5页
Journal of Chemical Engineering of Chinese Universities
关键词
化学刻蚀
微纳米结构
超疏水
接触角
结霜
chemical etching
micro-nanostructure
super-hydrophobic
contact angle
frosting
