title: Local Dielectric Property Detection of the Interface between Nanoparticle and Polymer in Nanocomposite Dielectrics.
abstract: The interface between nanoparticles and polymer matrix is considered to have an important effect on the properties of nanocomposites. In this experimental study, electrostatic force microscopy (EFM) is used to study the local dielectric property of the interface of low density polyethylene (LDPE)/TiO2nanocomposites at nanometer scale. The results show that the addition of TiO2nanoparticles leads to a decrease in local permittivity. We then carry out the finite element simulation and confirm that the decrease of local permittivity is related to the effect of interface. According to the results, we propose several models and validate the dielectric effect and range effect of interface. Through the analysis of DSC and solid-state NMR results, we find TiO2nanoparticles can suppress the mobility of local chain segments in the interface, which influences the dipolar polarization of chain segments in the interface and eventually results in a decrease in local permittivity. It is believed the results would provide important hint to the research of the interface in future research.
authors.affiliation: State Key Lab of Power Systems, Department of Electrical Engineering, Tsinghua University, Beijing, 100084, China.
authors.forename: Simin
authors.initials: S
authors.lastname: Peng
authors.affiliation: Key Laboratory of Standardization and Measurement for Nanotechnology, Chinese Academy of Sciences, National Center for Nanoscience and Technology, Beijing, 100190, China.|School of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing, 101408, China.
authors.forename: Qibin
authors.initials: Q
authors.lastname: Zeng
authors.affiliation: State Key Lab of Power Systems, Department of Electrical Engineering, Tsinghua University, Beijing, 100084, China.
authors.forename: Xiao
authors.initials: X
authors.lastname: Yang
authors.affiliation: State Key Lab of Power Systems, Department of Electrical Engineering, Tsinghua University, Beijing, 100084, China.
authors.forename: Jun
authors.initials: J
authors.lastname: Hu
authors.affiliation: Key Laboratory of Standardization and Measurement for Nanotechnology, Chinese Academy of Sciences, National Center for Nanoscience and Technology, Beijing, 100190, China.
authors.forename: Xiaohui
authors.initials: X
authors.lastname: Qiu
authors.affiliation: State Key Lab of Power Systems, Department of Electrical Engineering, Tsinghua University, Beijing, 100084, China.
authors.forename: Jinliang
authors.initials: J
authors.lastname: He