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Application of a Coupling Agent to Improve the Dielectric Properties of Polymer-Based Nanocomposites
Published on: September 19, 2020
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Microstructure and Electrical Properties of Fluorene Polyester Based Nanocomposite Dielectrics
Wenchao Zhang1,2, Kuo Zhao1,2, Feng Guan3
1Key Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin University of Science and Technology, Harbin 150080, China.
Polymers
|September 28, 2021
Summary
Adding silicon dioxide (SiO2) nanoparticles to fluorene polyester (FPE) enhances dielectric properties. This composite material shows a significantly improved dielectric constant and a 12-fold increase in corona resistance lifetime.
Area of Science:
- Materials Science
- Polymer Science
- Electrical Engineering
Background:
- Fluorene polyester (FPE) is a dielectric material with limitations in dielectric constant and corona resistance life.
- These limitations restrict the application range of FPE in demanding environments.
- There is a need for enhanced FPE-based materials for high-strength insulation.
Purpose of the Study:
- To develop FPE-based composite films with simultaneously enhanced dielectric constant and corona aging lifetime.
- To investigate the effect of SiO2 nanoparticle addition on FPE microstructure and dielectric performance.
Main Methods:
- Preparation of FPE-based composite films with SiO2 nanoparticles.
- Characterization of composite film microstructure using SEM, XRD, IR, and SAXS.
- Investigation of dielectric properties: dielectric constant, breakdown strength, and corona resistance lifetime.
Main Results:
- SiO2 nanoparticles were successfully incorporated without disrupting the FPE molecular chain structure.
- The filler-matrix interface thickness increased with SiO2 addition.
- The dielectric constant of SiO2/FPE composites increased from 3.54 to 7.30 at 1 Hz.
- Corona resistance lifetime showed a significant improvement, approximately 12 times longer than pure FPE.
Conclusions:
- SiO2 nanoparticles effectively enhance the dielectric constant and corona resistance lifetime of FPE.
- The developed SiO2/FPE composites show potential for high-strength insulating material applications.
- This study demonstrates a viable strategy for improving FPE dielectric materials.
