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231 / 2021-11-03 10:58:24
Effect of Na+ on molecular relaxation of epoxy/alumina resin composites
composite insulation materials; dielectric properties; epoxy resin; impurity ions; Molecular chain
High voltage and insulation technology > Other topics in high voltage and insulation technology
Final Paper
Yafang Gao / Xi'An Jiaotong University
Mingru Li / Xi'an Jiaotong University
Shengtao Li / Xi'an Jiaotong University
Wang Kun / Global Energy Interconnection Research Institute
Abstract – Epoxy resin is an insulating material widely used in high-voltage electrical equipment, and Na+ is one of the main impurity ions in epoxy resin. In this research, we added different mass fraction Na+ into epoxy/alumina composites. After that, we measured the gel time, glass transition temperature and broadband dielectric spectrum. Besides, we used H-N function to fit the data of dielectric spectrum,used VFT function to calculate the activation energy of macromolecular chains. The gel time data showed that Na+ can promote the gelation of epoxy composite castables. The glass transition temperature proved that Na+ can promote crosslinking. The calculation results of dielectric fitting showed that Na+ can increase the activation energy of macromolecular chains and increases the intensity of ion ionization. This research reveal the effect of Na+ on molecular relaxation in epoxy composites and provide reference for the control of Na+ content in epoxy composites.
 
This work was supported by Science and Technology Project of SGCC Project Numbers (5500-201958322A-0-0-00)

Yafang Gao, State Key Laboratory of Electrical Insulation and Power Equipment, Xi`an Jiaotong University Xi`an, China. (Email: 979088042@qq.com)

Mingru Li, State Key Laboratory of Electrical Insulation and Power Equipment, Xi`an Jiaotong University Xi`an, China. (Email: 549675145@qq.com)

Shengtao Li*, State Key Laboratory of Electrical Insulation and Power Equipment, Xi`an Jiaotong University Xi`an, China. (Email:sli@mail.xjtu.edu.cn)

Kun Wang,State Key Laboratory of Advanced Power Transmission Technology Global Energy Interconnection Research Institute Co., Ltd Beijing, China wangkun278@163.com

Important Date

  • Conference Date

    Jul 11

    2023

    to

    Aug 18

    2023

  • Nov 10 2021

    Draft paper submission deadline

  • Dec 10 2021

    Registration deadline

  • Dec 11 2021

    Contribution Submission Deadline

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IEEE IAS
Organized By
IEEE IAS Student Chapter of Southwest Jiaotong University (SWJTU)
IEEE IAS Student Chapter of Huazhong University of Science and Technology (HUST)
IEEE PELS (Power Electronics Society) Student Chapter of HUST
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