TY - GEN
T1 - Enhancement of Surface flashover performance of epoxy by doping POSS nanofillers
AU - Aslam, Farooq
AU - Qu, Guanghao
AU - Li, Zhen
AU - Xu, Haoming
AU - Wang, Weiwang
AU - Li, Shengtao
N1 - Publisher Copyright:
© 2020 IEEE.
PY - 2020/7/5
Y1 - 2020/7/5
N2 - Surface flashover is key issue to limit the development of high voltage insulation equipment. Various nano-fillers are added to improve the performance of epoxy composites. With the ultimate goal to enhance the surface flashover performance, two different types of polyhedral oligomeric silsesquioxane (POSS) nanometric molecular structure is doped into neat epoxy. Surface flashover voltage has been tested under DC voltage in SF6 gas. Isothermal surface potential decay (SPD) test were conducted to find out the surface charge characteristics. Quantum chemical calculation was performed to investigate the absolute energy value of Lowest Unoccupied Molecular Orbital (LUMO) level for epoxy/POSS composite, associated to electron affinity for charge carriers. Results specifies that flashover voltage has been positively influenced by both trap energy and trap density of charges. While improved flashover performance of EP/OG-POSS composite compared to EP/ECH-POSS and pristine sample is attributed to deep traps for charges. The energy distribution diagram shows that EP/OG-POSS has higher affinity for charge carrier in EP/OG-POSS comparatively. The affinity for carriers assists the charge trapping centers. Moreover, functional properties of POSS side groups can determine the tailoring of deep trap; moreover, the simulated electronic properties are helpful to understand the improved properties of surface flashover voltage.
AB - Surface flashover is key issue to limit the development of high voltage insulation equipment. Various nano-fillers are added to improve the performance of epoxy composites. With the ultimate goal to enhance the surface flashover performance, two different types of polyhedral oligomeric silsesquioxane (POSS) nanometric molecular structure is doped into neat epoxy. Surface flashover voltage has been tested under DC voltage in SF6 gas. Isothermal surface potential decay (SPD) test were conducted to find out the surface charge characteristics. Quantum chemical calculation was performed to investigate the absolute energy value of Lowest Unoccupied Molecular Orbital (LUMO) level for epoxy/POSS composite, associated to electron affinity for charge carriers. Results specifies that flashover voltage has been positively influenced by both trap energy and trap density of charges. While improved flashover performance of EP/OG-POSS composite compared to EP/ECH-POSS and pristine sample is attributed to deep traps for charges. The energy distribution diagram shows that EP/OG-POSS has higher affinity for charge carrier in EP/OG-POSS comparatively. The affinity for carriers assists the charge trapping centers. Moreover, functional properties of POSS side groups can determine the tailoring of deep trap; moreover, the simulated electronic properties are helpful to understand the improved properties of surface flashover voltage.
UR - https://www.scopus.com/pages/publications/85101216524
U2 - 10.1109/ICD46958.2020.9341971
DO - 10.1109/ICD46958.2020.9341971
M3 - 会议稿件
AN - SCOPUS:85101216524
T3 - Proceedings of the 2020 IEEE 3rd International Conference on Dielectrics, ICD 2020
SP - 110
EP - 113
BT - Proceedings of the 2020 IEEE 3rd International Conference on Dielectrics, ICD 2020
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 3rd IEEE International Conference on Dielectrics, ICD 2020
Y2 - 5 July 2020 through 9 July 2020
ER -