TY - GEN
T1 - Role of free volume on breakdown of epoxy nanocomposites
T2 - 2022 IEEE International Conference on High Voltage Engineering and Applications, ICHVE 2022
AU - An, Dongxu
AU - Zha, Xiaopeng
AU - Gao, Jian
AU - Long, Yiwei
AU - Wu, Kangning
AU - Li, Jianying
N1 - Publisher Copyright:
© 2022 IEEE.
PY - 2022
Y1 - 2022
N2 - Free volume (fv), which is strongly associated with the chain mobility and charge transportation in polymer dielectrics, could significantly affect electrical properties. In this paper, free volume of epoxy nanocomposites was effectively reduced by incorporating organically modified nano-Al2O3 fillers. Consequently, the highest DC breakdown strength (159.09 kV/mm) was obtained when the filler content was 1 wt%. Fourier transformed infrared spectroscopy (FTIR) results indicated that the filler-matrix interaction brought by the formation of hydrogen bonds as well as covalent bonds were responsible for the free volume manipulation. Images of fracture morphology and analysis by small angle x-ray scattering (SAXS) showed that different degrees of filler-matrix interaction existed when incorporating fillers with varied contents, which as a result gave rise to the successful tailoring of free volume. This paper provides feasible methods for the quantitative measurement of free volume as well as its effective manipulation.
AB - Free volume (fv), which is strongly associated with the chain mobility and charge transportation in polymer dielectrics, could significantly affect electrical properties. In this paper, free volume of epoxy nanocomposites was effectively reduced by incorporating organically modified nano-Al2O3 fillers. Consequently, the highest DC breakdown strength (159.09 kV/mm) was obtained when the filler content was 1 wt%. Fourier transformed infrared spectroscopy (FTIR) results indicated that the filler-matrix interaction brought by the formation of hydrogen bonds as well as covalent bonds were responsible for the free volume manipulation. Images of fracture morphology and analysis by small angle x-ray scattering (SAXS) showed that different degrees of filler-matrix interaction existed when incorporating fillers with varied contents, which as a result gave rise to the successful tailoring of free volume. This paper provides feasible methods for the quantitative measurement of free volume as well as its effective manipulation.
KW - electrical breakdown
KW - epoxy nanocomposites
KW - free volume
KW - surface modification
UR - https://www.scopus.com/pages/publications/85146957889
U2 - 10.1109/ICHVE53725.2022.10014459
DO - 10.1109/ICHVE53725.2022.10014459
M3 - 会议稿件
AN - SCOPUS:85146957889
T3 - 2022 IEEE International Conference on High Voltage Engineering and Applications, ICHVE 2022
BT - 2022 IEEE International Conference on High Voltage Engineering and Applications, ICHVE 2022
PB - Institute of Electrical and Electronics Engineers Inc.
Y2 - 25 September 2022 through 29 September 2022
ER -