超疏水-亲水CaBi4Ti4O15涂层制备及其表面浸润性研究  

Fabrication and Investigation of Superhydrophobic-Hydrophilic CaBi_4Ti_4O_(15) Coatings

作　　者：李达[1] 张日理[1] 肖文佳[1] 杨洋溢[2] 何振辉[1] 

机构地区：[1]中山大学光电材料与技术国家重点实验室,广州510275 [2]中山大学化学与化学工程学院,广州510275

出　　处：《无机材料学报》2008年第4期745-748,共4页Journal of Inorganic Materials

基　　金：国家自然科学基金(50372085);广东省科技计划项目(2006A1100100)

摘　　要：采用简单的涂抹方法,在衬底上制备了CaBi_4Ti_4O_(15)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CaBi_4Ti_4O_(15)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:CaBi_4Ti_4O_(15)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CaBi_4Ti_4O_(15)涂层表面呈现出超疏水性.CaBi4Ti4O15 coatings were fabricated on A1203 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 CaBi4TiaO15 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.

关 键 词：CaBi4Ti4O15 涂层 异质结构 表面浸润性 

分 类 号：TB383[一般工业技术—材料科学与工程] O647[理学—物理化学]