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ZnO基超疏水表面的制备及其与水黏着性研究

发表时间:2009-11-30  浏览量:1356  下载量:674
全部作者: 李涛,刘长松,张强,李志文
作者单位: 青岛理工大学机械工程学院
摘 要: 利用低温液相法制备具有粗糙微纳米结构的ZnO薄膜,然后用十七氟四氢三甲氧基硅烷(Heptad-ecafluoro-1,1,2,2-tetrapydrodecy-1-trime-thoxysilane, FAS)自组装单分子膜对该表面进行修饰,研究ZnO微纳米结构表面修饰前后的润湿性及其与水之间的黏着性。结果表明:粗糙的ZnO表面具有高疏水性(接触角为139.5°)和高黏着性,但经FAS改性后,样品表面达到了超疏水性(接触角为172.9°),并且水滴与该表面几乎不黏着。这种优异的超疏水特性(高接触角和低黏着性)是ZnO粗糙结构和FAS低表面能双重作用的结果。利用这2种表面的超疏水性以及与水黏着性的显著差异,可以实现微液滴在这2个表面之间的无损转移,这使该表面有望在涉及微液滴操作的微流体器件中得到应用。
关 键 词: 无机非金属材料;ZnO;微纳米结构;润湿性;超疏水;微流体器件
Title: Fabrication of ZnO-based super hydrophobic surfaces and their water-adhesion properties
Author: LI Tao, LIU Changsong, ZHANG Qiang, LI Zhiwen
Organization: Department of Mechanical Engineering, Qingdao Technological University
Abstract: ZnO films with rough micronanostructures were fabricated by a low-temperature liquid method. (Heptad-ecafluoro-1,1,2,2-tetrapydrodecy-1-trime-thoxysilane, FAS) was used to modify the ZnO micronanostructure surface by self-assembly technology. This study focused on the wettability and water adhesion property of ZnO-based films before and after FAS modification. After they were modified by FAS, the water contact angle increased from 139.5° to 172.9°, indicating a transition of wettability from high-hydrophobic to super-hydrophobic. Also, the water adhesion changed from high to almost zero. Such excellent super hydrophobicity (high water contact angle and low water adhesion) resulted from the binary effect of the roughness of ZnO micronanostructures and the low surface energy of FAS. Using the significant difference of water adhesion on the two superhydrophobic surfaces (ZnO films before and after FAS modification), water micro-droplets can be transfered between these two surfaces without any mass loss. It is expected to apply these surfaces in microfluidic devices.
Key words: non-metallic inorganic material; ZnO; micronanostructure; wettability; super hydrophobic; microfluidic device
发表期数: 2009年11月第22期
引用格式: 李涛,刘长松,张强,等. ZnO基超疏水表面的制备及其与水黏着性研究[J]. 中国科技论文在线精品论文,2009,2(22):2417-2421.
 
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