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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.
The coating of CaBi_4Ti_4O_ (15) was prepared on the substrate by simple smearing method. After being annealed at different temperatures and placed at 120 ℃, the wettability of the coating was changed from superhydrophobic to hydrophilic with the contact angles of 152.5 ° to 43.6 ° (15) coating on the surface of CaBi_4Ti_4O_ (15) coatings was investigated by means of scanning electron microscopy.The results showed that the variation of grain size and pore size on the surface of CaBi_4Ti_4O_ (15) Which is the main reason that causes the surface wettability to change from superhydrophobic to hydrophilic. However, the hierarchical structure containing nanoparticles leads to superhydrophobicity on the surface of hydrophilic CaBi_4Ti_4O_ (15) coating.