物理化学学报2013，Vol.29Issue(7)：1603-1608,6.DOI:10.3866/PKU.WHXB201305091
纳米复合材料中界面动态特性的扫描静电显微技术研究
An Electrostatic Force Microscopy Investigation of the Dynamic Properties of Microscopic Interface in Nanocomposites
摘要
Abstract
The microscopic structure and properties of the interfacial regions in nanocomposites considerably affect the dielectric properties such as dielectric constant,dielectric loss,and breakdown strength.In this paper,we developed a method based on electrostatic force microscopy (EFM) to characterize the structures and the dynamic dielectric responses of the interfaces in TiO2/epoxy nanocomposites.The nanometer-scale resolution of EFM enabled direct detection of the temperature-dependent dielectric response associated with the molecular dipoles of the epoxy chains at the interface between TiO2 nanoparticles and epoxy matrix.In addition,different interfacial effects were obtained by the surface modification of TiO2 nanoparticles.The EFM images showed that the investigated interfacial regions around the two types of TiO2 nanoparticles exhibited different dielectric loss responses.关键词
界面作用/介电响应/静电力/环氧树脂/纳米复合材料Key words
Interfacial effect/ Dielectric response/ Electrostatic force/ Epoxy resin/Nanocomposite分类
化学化工引用本文复制引用
彭金平,张冬冬,关丽,张晖,张忠,裘晓辉..纳米复合材料中界面动态特性的扫描静电显微技术研究[J].物理化学学报,2013,29(7):1603-1608,6.基金项目
The project was supported by the National Natural Science Foundation of China (20973046,11225210) and Ministry of Science and Technology of China (2010DFA54310,2011DFR50200).国家自然科学基金(20973046,11225210)和科技部(2010DFA54310,2011DFRS0200)资助项目 （20973046,11225210）
