无机材料学报

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超疏水-亲水CaBi4Ti4O15涂层制备及其表面浸润性研究

李 达1, 张曰理1, 肖文佳1, 杨洋溢2, 何振辉1   

  1. 中山大学1. 光电材料与技术国家重点实验室; 2. 化学与化学工程学院, 广州 510275
  • 收稿日期:2007-07-27 修回日期:2007-10-26 出版日期:2008-07-20 网络出版日期:2008-07-20

Fabrication and Investigation of Superhydrophobic-Hydrophilic CaBi4Ti4O15 Coatings

LI Da1, ZHANG Yue-Li1, XIAO Wen-Jia1, YANG Yang-Yi2, HE Zhen-Hui1   

  1. 1. State Key Laboratory of Optoelectronic Materials and Technologies/School of Physics & Engineering, Sun Yat-Sen University, Guangzhou 510275, China; 2. The School of Chemistry and Chemical Engineering of Sun Yat-Sen University, Guangzhou 510275, China
  • Received:2007-07-27 Revised:2007-10-26 Published:2008-07-20 Online:2008-07-20

摘要: 采用简单的涂抹方法, 在衬底上制备了CaBi4Ti4O15涂层; 经不同温度退火和120℃放置处理, 得到了浸润性从超疏水到亲水, 其表面接触角从152.5°到43.6°变化的CaBi4Ti4O15涂层表面; 通过扫描电镜分析,研究了不同退火温度下涂层表面微观结构变化对表面
浸润性的影响. 结果表明: CaBi4Ti4O15涂层表面晶粒和孔洞尺寸变化是导致其表面浸润性从超疏水到亲水变化的主要原因, 而包含纳米颗粒的阶层结构导致亲水CaBi4Ti4O15涂层表面呈现出超疏水性.

关键词: CaBi4Ti4O15, 涂层, 异质结构, 表面浸润性

Abstract: CaBi4Ti4O15 coatings were fabricated on Al2O3 substrates with a simple spin coating method. These coatings were annealed at different temperatures and then kept in air at 120℃ for several days. The microstructures of CaBi4Ti4O15 coatings were
studied by using SEM. CaBi4Ti4O15 coatings display distinct wettability from superhydrophobicity to hydrophilicity, the
corresponding surface contact angles change from 152.5° to 43.6°. The SEM observation indicates the size change of crystal grains and cavities of rough surfaces is the main reason why the wettability of CaBi4Ti4O15 coatings changes from superhydrophobicity to hydrophilicity, and the intrinsically hydrophilic material performs non-wetting due to rough hierarchical structure with nano-particles.

Key words: CaBi4Ti4O15, coating, hierarchical structure, wettability

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