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Article

Study on the Structure and Dielectric Properties of Zeolite/LDPE Nanocomposite under Thermal Aging

by 1,2,3,*, 1,2,3, 1,2,3, 1,2,3, 1,2,3, 1,2,3 and 1,2,3
1
Key Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin University of Science and Technology, Harbin 150080, China
2
State Key Laboratory Breeding Base of Dielectrics Engineering, Harbin University of Science and Technology, Harbin 150080, China
3
College of Electrical & Electronic Engineer, Harbin University of Science and Technology, Harbin 150080, China
*
Author to whom correspondence should be addressed.
Received: 24 August 2020 / Revised: 6 September 2020 / Accepted: 12 September 2020 / Published: 16 September 2020
(This article belongs to the Special Issue High-Performance Polyethylene)
Nanodoping is an effective way to improve the dielectric properties and the aging resistance of polyethylene. Nano-zeolite has a nano-level porous structure and larger specific surface area than ordinary nano-inorganic oxide, which can be used to improve dielectric properties of low-density polyethylene (LDPE) nanocomposite. The zeolite/LDPE nanocomposites were prepared and subjected to thermal aging treatment to obtain samples with different aging time. Using scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and the differential scanning calorimetry (DSC) test to study the microscopic and structure characteristics, it was found that nano-zeolite doping can effectively reduce the thermal aging damage to the internal structure of the nanocomposite; carbonyl and hydroxyl decreased significantly during the thermal aging time, and the crystallinity effectively improved. Nano-zeolite doping significantly improved the morphology and strengthened the aging resistance of the nanocomposite. In the dielectric strength test, it was found that nanodoping can effectively improve the direct current (DC) and alternating current (AC) breakdown field strength and the stability after the thermal aging. The dielectric constant of nanocomposite can be reduced, and the dielectric loss had no obvious change during the aging process. Moreover, the zeolite/LDPE nanocomposite with the doping concentration of 1 wt % had the best performance, for the nano-zeolite was better dispersed. View Full-Text
Keywords: polyethylene; zeolite; nanocomposite; thermal aging; breakdown; dielectric spectrum polyethylene; zeolite; nanocomposite; thermal aging; breakdown; dielectric spectrum
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MDPI and ACS Style

Han, B.; Yin, C.; Chang, J.; Pang, Y.; Lv, P.; Song, W.; Wang, X. Study on the Structure and Dielectric Properties of Zeolite/LDPE Nanocomposite under Thermal Aging. Polymers 2020, 12, 2108. https://0-doi-org.brum.beds.ac.uk/10.3390/polym12092108

AMA Style

Han B, Yin C, Chang J, Pang Y, Lv P, Song W, Wang X. Study on the Structure and Dielectric Properties of Zeolite/LDPE Nanocomposite under Thermal Aging. Polymers. 2020; 12(9):2108. https://0-doi-org.brum.beds.ac.uk/10.3390/polym12092108

Chicago/Turabian Style

Han, Bai, Chuqi Yin, Jiaxin Chang, Yu Pang, Penghao Lv, Wei Song, and Xuan Wang. 2020. "Study on the Structure and Dielectric Properties of Zeolite/LDPE Nanocomposite under Thermal Aging" Polymers 12, no. 9: 2108. https://0-doi-org.brum.beds.ac.uk/10.3390/polym12092108

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