| POLYMERS AND POLYMER MATRIX COMPOSITES |
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| Effects of Blending Al2O3@SiO2 Core-Shell Nanospheres on the Dielectric Properties and Space Charge Properties of Polypropylene |
| HAN Kunying1, MEN Rujia1, GUO Meiqing2, LEI Zhipeng1,*, WANG Xinyu3, WANG Yifei4, SHI Zhijie1
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1 Shanxi Key Laboratory of Mining Electrical Equipment and Intelligent Control, College of Electrical and Power Engineering, Taiyuan University of Technology, Taiyuan 030024, China
2 College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan 030024, China
3 School of Engineering, Computing and Mathematics, University of Plymouth, Plymouth PL4 8AA, United Kingdom
4 Institute of Materials Science, University of Connecticut, Storrs 06066, USA |
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Abstract In order to study the effect of Al2O3@SiO2 core-shell nanoparticles on the properties of polypropylene (PP) nanocomposites, spherical Al2O3@SiO2 core-shell nanoparticles were synthesized by the surface precipitation method, and the PP nanocomposites with Al2O3@SiO2 core-shell nanospheres were prepared. The physicochemical properties, dielectric spectra, and space charge properties of PP nanocomposites with different contents of Al2O3@SiO2 nanoparticles were studied. The experimental results show that Al2O3@SiO2 nanospheres reduce the sto-rage modulus of PP nanocomposites and enhance their toughness. The filler content of Al2O3@SiO2 nanospheres has an evident effect on the dielectric properties and space charge properties. When the filler content is low, the core-shell structure of Al2O3@SiO2 nanospheres enhances the compatibility between fillers and the matrix and the interaction in the interface region, which further affects the charge density and carrier mobi-lity. Consequently, the relative permittivity and dielectric loss factor of PP nanocomposites decrease. The heterocharge accumulation is also suppressed, improving PP nanocomposites' dielectric and space charge properties.
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Published: 25 March 2024
Online: 2024-04-07
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| Fund:National Natural Science Foundation of China (51977137), Central Guidance on Local Science and Technology Development Fund of Shanxi Province (YDZJSX2021A021), and Fundamental Research Program of Shanxi Province (202103021224115). |
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Corresponding Authors:
*leizhipeng@163.com
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2024, Vol. 38 
