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Effect of Nano-SiO2 Addition on Relative Permittivity and Conduction Characteristic of Ethylene Propylene Diene Monomer
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Ruixue ZHAO1, 2, Rujia MEN1, Xiaoxiao XU3, Zhipeng LEI1, Jiancheng SONG1, Yang LIU1, Ye WANG1
Insulating Materials | 2021, 54(1) : 18 - 24
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Insulating Materials | 2021, 54(1): 18-24
• Material Research •
Effect of Nano-SiO2 Addition on Relative Permittivity and Conduction Characteristic of Ethylene Propylene Diene Monomer
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Ruixue ZHAO1, 2, Rujia MEN1, Xiaoxiao XU3, Zhipeng LEI1, Jiancheng SONG1, Yang LIU1, Ye WANG1
Affiliations
  • 1National & Provincial Joint Engineering Laboratory of Mining Intelligent Electrical Apparatus Technology, Shanxi Key Laboratory of Mining Electrical Equipment and Intelligent Control, Taiyuan University of Technology, Taiyuan 030024, China
  • 2State Grid Shaanxi Electric Power Company Xi'an Power Supply Company, Xi'an 710048, China
  • 3Hebei Maintenance Branch of State Grid, Shijiazhuang 050000, China
Published: 2021-01-20 doi: 10.16790/j.cnki.1009-9239.im.2021.01.004
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In order to find out the effect of adding nano-SiO2 on the relative permittivity and conduction characteristic of ethylene propylene diene monomer (EPDM) insulation, we prepared EPDM composite dielectrics with different mass fractions of nano-SiO2 by melt-blending method. The dispersion of nanoparticles in the EPDM matrix and the bonding properties between nanoparticles and EPDM matrix were analyzed. The relative permittivity and the steady-state current of the EPDM nanocomposite dielectrics at different temperatures and electric fields were measured, and the conductance characteristic were analyzed. The results show that when the mass fraction of nano-SiO2 is 0.5%, the dispersion of nano-SiO2 is the best in EPDM. The steric hindrance, which formed by doping of low content, reduces the mobility of the EPDM molecular segments and its side groups, and the interface effect is obvious in the nanocomposite dielectrics, making the relative permittivity and conductance decrease, the threshold electric field strength of space charge injection enhance, the insulating performance improve significantly. With the increase of the mass fraction, the interface effect between nanoparticles and EPDM matrix is weakened. When the mass fraction of nano-SiO2 is 2.5% or 5.0%, the agglomeration caused by doping makes the relative permittivity and the conductance increase, and the threshold electric field strength of space charge injection decreases. The interface effect caused by the addition of nano-SiO2 is a key factor affecting the properties of EPDM nanocomposite dielectrics.

ethylene propylene diene monomer  /  nano silica  /  conduction characteristic  /  relative permittivity
Ruixue ZHAO, Rujia MEN, Xiaoxiao XU, Zhipeng LEI, Jiancheng SONG, Yang LIU, Ye WANG. Effect of Nano-SiO2 Addition on Relative Permittivity and Conduction Characteristic of Ethylene Propylene Diene Monomer[J]. Insulating Materials, 2021 , 54 (1) : 18 -24 . DOI: 10.16790/j.cnki.1009-9239.im.2021.01.004
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Article Info
doi: 10.16790/j.cnki.1009-9239.im.2021.01.004
  • Receive Date：2020-04-15
  • Online Date：2026-01-26
  • Published：2021-01-20
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  • Received：2020-04-15
  • Revised：2020-06-01
Funding
Affiliations
    1National & Provincial Joint Engineering Laboratory of Mining Intelligent Electrical Apparatus Technology, Shanxi Key Laboratory of Mining Electrical Equipment and Intelligent Control, Taiyuan University of Technology, Taiyuan 030024, China
    2State Grid Shaanxi Electric Power Company Xi'an Power Supply Company, Xi'an 710048, China
    3Hebei Maintenance Branch of State Grid, Shijiazhuang 050000, China
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表12种不同金属材料的力学参数
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小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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