摘要
利用飞秒激光在Si表面刻蚀具有不同宽度和深度的微槽形貌,经过硅烷化处理后,通过测量接触角和流变特性试验研究其疏水性与流动减阻特性关系。试验结果表明:接触角越大即疏水性愈强,减阻效果愈显著。因此,利用激光刻蚀表面方法可以在一定程度上调控固体表面的疏水性进而控制减阻特性。
The micrometer-scaled channels with different width and depth on the Si surface were prepared by femtosecond laser ablation. The relationship between the hydrophobicity and flow drag reduction has been studied through the measurement of water contact angle （WCA） and rheological characteristic experiment after the samples were made hydrophobic through a chemical reaction with an organosilane. It is found in the experiment that the bigger the WCA or the more hydrophobic water is, the more remarkable the effects of drag reduction would be. Accordingly, the certain-extentcontrollable hydrophobicity of solid surface could be prepared by the laser ablation and also the characteristics of drag reduction would be controlled.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2008年第4期172-174,171,共4页
Transactions of the Chinese Society for Agricultural Machinery
基金
国家自然科学基金资助项目(项目编号:50435030)
关键词
激光刻蚀
流变特性
疏水性
减阻
Laser ablation, Rheological characteristic, Hydrophobicity, Drag reduction
