title: Investigation of space charge distribution of low-density polyethylene/GO-GNF (graphene oxide from graphite nanofiber) nanocomposite for HVDC application.
abstract: This paper reported a research on space charge distribution in low-density polyethylene (LDPE) nanocomposites with different types of graphene and graphene oxide (GO) at low filler content (0.05 wt%) under high DC electric field. Effect of addition of graphene oxide or graphene, its dispersion in LDPE polymer matrix on the ability to suppress space charge generation will be investigated and compared with MgO/LDPE nanocomposite at the same filler concentration. At an applied electric field of 80 kV/mm, a positive packet-like charge was observed in both neat LDPE, MgO/LDPE, and graphene/LDPE nanocomposites, whereas only little homogenous space charge was observed in GO/LDPE nanocomposites, especially with GO synthesized from graphite nano fiber (GNF) which is only -100 nm in diameter. Our research also suggests that dispersion of graphene oxide particles on the polymer matrix plays a significant role to the performance of nanocomposites on suppressing packet-like space charge. From these results, it is expected that nano-sized GO synthesized from GNF can be a promising filler material to LDPE composite for HVDC applications.
authors.affiliation: Polymer Research Group, LS Cable and System, Hogye-dong, Anyang-Si, Gyeonggi-do, Korea.
authors.forename: Yoon Jin
authors.initials: YJ
authors.lastname: Kim
authors.forename: Son-Tung
authors.initials: ST
authors.lastname: Ha
authors.forename: Gun Joo
authors.initials: GJ
authors.lastname: Lee
authors.forename: Jin Ho
authors.initials: JH
authors.lastname: Nam
authors.forename: Ik Hyun
authors.initials: IH
authors.lastname: Ryu
authors.forename: Su Hyun
authors.initials: SH
authors.lastname: Nam
authors.forename: Cheol Min
authors.initials: CM
authors.lastname: Park
authors.forename: Insik
authors.initials: I
authors.lastname: In
authors.forename: Jiwan
authors.initials: J
authors.lastname: Kim
authors.forename: Chul Jong
authors.initials: CJ
authors.lastname: Han
mesh_terms: D017097:Electric Impedance; D006108:Graphite / Q000737:chemistry*; D008422:Materials Testing; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D010087:Oxides / Q000737:chemistry; D010316:Particle Size; D020959:Polyethylene / Q000737:chemistry*; D055672:Static Electricity; D013499:Surface Properties
chemical_list: D010087:Oxides; D006108:Graphite; D020959:Polyethylene