机构地区: 重庆大学材料科学与工程学院
出 处: 《材料科学与工程学报》 2004年第1期71-73,共3页
摘 要: 用液相沉积法对纳米二氧化钛进行了表面改性。用XRD、FT IR分析手段对其进行了表面结构表征 ,采用X衍射荧光光谱仪 (XRF)测定SiO2 包覆量随陈化时间的变化。通过煅烧失重法比较改性前后样品的失重 ,并用动态法测量样品与水的湿润角。结果表明在TiO2 表面存在致密非晶态的硅氧化合物膜 ,纳米TiO2 与水的湿润角增大 ,并且充分分散后在水中的稳定性却得到了很大提高。 Nano-TiO 2 was modified on its surface by chemical liquid deposition. Through the analysis of XRD and FT-IR illustration, it is proved that a film of noncrystal silicon compound on nano-TiO 2 is produced. The change of SiO 2 content with aging time is mensurated by X-ray fluorescence(XRF).After samples calcined at 850℃, the difference of their weightlessness showed that the film is dense. Surface modification is able to increase wetting angle between nano-TiO 2 particles and water, and improve stability of nano-TiO 2 in water when it is dispersed fully.
关 键 词: 纳米 液相沉积法 表面改性 动态法 湿润角 稳定性
领 域: [一般工业技术]