The linear polymer, polyetherimide (PEI), has attracted much attention in recent years due to its high energy storage efficiency and high operating temperature. In this work, the effect of humidity on the relevant properties of PEI is investigated by changing the ambient humidity during electrostatic spinning. The results show that humidity affects the microscopic morphology of PEI after spinning and the dielectric energy storage properties of PEI films. Microstructure images show that the humidity of the spinning environment not only affects the morphology of the PEI filament, but also has an effect on the surface morphology of the PEI film after hot pressing. The experimental test results demonstrate that humidity has a significant effect on the energy storage performance. The reasons for this change were analyzed by molecular dynamics and x-ray photoelectron spectroscopy (XPS). It was found that the attraction of hydroxyl groups may hinder the rotation of the phthalimide rings reducing the polarization rate causing a decrease in polarization.
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27 September 2021
Research Article|
September 27 2021
Effect of humidity on the microstructure and energy storage properties of polyetherimide
Mengjia Feng;
Mengjia Feng
1
Key Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin University of Science and Technology
, Harbin 150080, People's Republic of China
2
School of Electrical and Electronic Engineering, Harbin University of Science and Technology
, Harbin 150080, People's Republic of China
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Yu Feng
;
Yu Feng
a)
1
Key Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin University of Science and Technology
, Harbin 150080, People's Republic of China
2
School of Electrical and Electronic Engineering, Harbin University of Science and Technology
, Harbin 150080, People's Republic of China
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Zhijie Yang
;
Zhijie Yang
1
Key Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin University of Science and Technology
, Harbin 150080, People's Republic of China
2
School of Electrical and Electronic Engineering, Harbin University of Science and Technology
, Harbin 150080, People's Republic of China
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Tiandong Zhang;
Tiandong Zhang
a)
1
Key Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin University of Science and Technology
, Harbin 150080, People's Republic of China
2
School of Electrical and Electronic Engineering, Harbin University of Science and Technology
, Harbin 150080, People's Republic of China
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Qingguo Chi
;
Qingguo Chi
1
Key Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin University of Science and Technology
, Harbin 150080, People's Republic of China
2
School of Electrical and Electronic Engineering, Harbin University of Science and Technology
, Harbin 150080, People's Republic of China
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Qingquan Lei
Qingquan Lei
1
Key Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin University of Science and Technology
, Harbin 150080, People's Republic of China
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Appl. Phys. Lett. 119, 132904 (2021)
Article history
Received:
August 06 2021
Accepted:
September 13 2021
Citation
Mengjia Feng, Yu Feng, Zhijie Yang, Tiandong Zhang, Qingguo Chi, Qingquan Lei; Effect of humidity on the microstructure and energy storage properties of polyetherimide. Appl. Phys. Lett. 27 September 2021; 119 (13): 132904. https://doi.org/10.1063/5.0066003
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