Fabrication and characterization of superhydrophobic surfaces on aluminum alloy substrates
Fabrication and characterization of superhydrophobic surfaces on aluminum alloy substrates
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DOI：
10.1016/j.apsusc.2014.09.147
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发表时间：
2014-12
影响因子：
6.7
通讯作者：
F. Lv;P. Zhang
中科院分区：
文献类型：
--
作者：
F. Lv;P. Zhang
超疏水表面在工业和日常生活中具有潜在的防冰应用。本研究采用联合收割机对表面能很低的1H，1H，2 H，2 H-全氟辛基三乙氧基硅烷（POTS）进行化学刻蚀和表面改性，以简化铝合金表面超疏水表面的制备过程。结果表明，经8.0wt%HCl水溶液刻蚀后，超疏水表面的接触角、滚动角和接触角滞后分别为162.5°、1.9°和1.1°，超疏水表面的表观表面自由能随表面温度的降低而增大;水滴在超疏水表面上的冻结时间延迟了1568秒，温度下降到-11.9 ° C。结果表明，超疏水表面具有优异的防冰性能。
Superhydrophobic surfaces have potential anti-icing applications in industries and daily life. In the present study, we combine the methods of chemical etching and surface modification with1H,1H,2H,2H-perfluorooctyltriethoxysilane (POTS) which has very low surface energy to simplify the fabrication procedures for superhydrophobic surfaces on aluminum alloy substrates. The results show that the contact angle (CA), rolling angle (RA) and contact angle hysteresis (CAH) of superhydrophobic surfaces etched with 8.0 wt% HCl aqueous solutions are 162.5°, 1.9° and 1.1°, respectively; the apparent surface free energies (ASFEs) of superhydrophobic surfaces increase with the decrease in surface temperature; the freezing time of water droplets on superhydrophobic surfaces is retarded by 1568s, and the temperature drops to as low as −11.9 ̊C. The results indicate that superhydrophobic surfaces exhibit excellent anti-icing properties.