TY - JOUR
T1 - Improved electrical insulating properties of LDPE based nanocomposite
T2 - Effect of surface modification of magnesia nanoparticles
AU - Ju, Siting
AU - Zhang, Hui
AU - Chen, Mingji
AU - Zhang, Chong
AU - Chen, Xin
AU - Zhang, Zhong
PY - 2014/11
Y1 - 2014/11
N2 - Three silane coupling agents with amino, long alkyl chain or vinyl functional groups were used to modify magnesia (MgO) nanoparticles. The modified nanoparticles were then mechanically mixed with low-density polyethylene (LDPE) to fabricate insulating nanocomposites. The average size of the modified MgO aggregates dispersed in LDPE matrix was below 100 nm. The pulsed electroacoustic method indicated that the MgO nanoparticles regardless of surface modification were effective to suppress the packet-like charge injection and accumulation in the LDPE sample, decrease the permittivity and tan δ, and also improved the direct-current breakdown strength of LDPE at different temperatures. The best insulating properties were found in the case of vinyl-silane-modified-MgO/ LDPE samples probably owing to the improved interfacial adhesion. A multi-core model was used to discuss the results obtained.
AB - Three silane coupling agents with amino, long alkyl chain or vinyl functional groups were used to modify magnesia (MgO) nanoparticles. The modified nanoparticles were then mechanically mixed with low-density polyethylene (LDPE) to fabricate insulating nanocomposites. The average size of the modified MgO aggregates dispersed in LDPE matrix was below 100 nm. The pulsed electroacoustic method indicated that the MgO nanoparticles regardless of surface modification were effective to suppress the packet-like charge injection and accumulation in the LDPE sample, decrease the permittivity and tan δ, and also improved the direct-current breakdown strength of LDPE at different temperatures. The best insulating properties were found in the case of vinyl-silane-modified-MgO/ LDPE samples probably owing to the improved interfacial adhesion. A multi-core model was used to discuss the results obtained.
KW - A. Nano-structures
KW - A. Polymer-matrix composites (PMCs)
KW - B. Electrical properties
UR - https://www.scopus.com/pages/publications/84907054425
U2 - 10.1016/j.compositesa.2014.07.003
DO - 10.1016/j.compositesa.2014.07.003
M3 - Article
AN - SCOPUS:84907054425
SN - 1359-835X
VL - 66
SP - 183
EP - 192
JO - Composites Part A: Applied Science and Manufacturing
JF - Composites Part A: Applied Science and Manufacturing
ER -