Abstract
Low density polyethylene (LDPE) doped with inorganic nano-MMT and nano-ZnO particles improved the dielectric properties of the cable insulation layer. In this article, nano-MMT/LDPE and nano-ZnO/LDPE composites were prepared by polymer intercalation and melt blending, respectively. The octadecyl quaternary ammonium salt and silane coupling agent were applied for surface modification in nano-MMT and nano-ZnO particles, and this then improved the compatibility of nanoparticles and polymeric matrix. These samples were characterized by FTIR, PLM, DSC and TSC, from which the effect of nanoparticles doping on polymer crystal habit and interface traps would be explored. In these experiments, the AC breakdown characteristics and space charge characteristic of different composites were studied. The experimental results showed that the interface bonding of nanoparticles and polymer was improved by coupling agents modifying. The dispersion of nanoparticles in matrix was better. When the mass fraction of nanoparticles doping was 3 wt.%, the crystallization rate and crystallinity of composites increased, and the crystalline structure was more complete. Besides, the amorphous regions in material decreased and the conducting channel was circuitous. At this time, the breakdown field strength of nano-MMT/LDPE and nano-ZnO/LDPE increased by 10.3% and 11.1%, compared to that of pure LDPE, respectively. Furthermore, the density and depth of interface traps in polymer increased with nanoparticles doping. Nano-MMT and nano-ZnO could both restrain the space charge accumulation, and the inhibiting effect of nano-ZnO was more visible.
Highlights
With the rapid development of electric power industry all over the world, energy optimization and reasonable allocation were the most essential problems to be solved at present
During the According course of to nanocomposite preparation, the polymer doped with moderate inorganic nanoparticles improved the dielectric property of the matrix nanoparticles and polymer matrix were added into the rotating speed rheometer
In order to explore the effect of different morphologies’ nanoparticles doping on polymer dielectric properties, the 3 wt.% nano-MMT and nano-ZnO composites were used for test
Summary
With the rapid development of electric power industry all over the world, energy optimization and reasonable allocation were the most essential problems to be solved at present. Nano-MgO and nano-ZnO doping had resistivity and breakdown field strength increased [16,17]. Nano-MgO and nano-ZnO doping had effective functions functions to to improve improve the the electrical electrical properties properties of of polymer polymer composites, composites, such such as as partial partial effective discharge-resistance, electrical treeing, corona aging and space charge accumulation restriction. From the breakdown characteristic test and space charge characteristic test,space the effect of characteristic the effect of nano-MMT and property nano-ZnO doping on the of nano-MMT andtest, nano-ZnO doping on the electrical of polyethylene waselectrical explored.property. Combining microcosmic test and macroscopic experimental research, it microcosmic test and macroscopic experimental research, it was known that the nanoparticles doping was known that the nanoparticles doping improved the dielectric properties of the material.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
