An Electrostatic Force Microscopy Investigation of the Dynamic Properties of Microscopic Interface in Nanocomposites

被引：5

作者：

Peng Jin-Ping ^{[1
]}

Zhang Dong-Dong ^{[1
]}

Guan Li ^{[2
]}

Zhang Hui ^{[1
]}

Zhang Zhong ^{[1
]}

Qiu Xiao-Hui ^{[1
]}

机构：

[1] Natl Ctr Nanosci & Technol, Beijing 100190, Peoples R China

[2] Renmin Univ China, Dept Chem, Beijing 100872, Peoples R China

来源：

ACTA PHYSICO-CHIMICA SINICA | 2013年 / 29卷 / 07期

基金：

中国国家自然科学基金;

关键词：

Interfacial effect; Dielectric response; Electrostatic force; Epoxy resin; Nanocomposite; EPOXY-RESIN; DIELECTRIC-PROPERTIES; POLARIZABILITY; SCATTERING; CHARGE;

D O I：

10.3866/PKU.WHXB201305091

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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.

引用

页码：1603 / 1608

页数：6

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