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Enhanced thermal conductivity of polyethylene nanocomposites with graphene, granulated graphene, graphene nanoplatelet, and their hybrids
Author(s) -
Usman Chaudhry,
Mabrouk Abdelnasser,
Abdala Ahmed
Publication year - 2021
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.7147
Subject(s) - graphene , materials science , nanocomposite , composite material , low density polyethylene , thermal conductivity , ternary operation , filler (materials) , polyethylene , nanotechnology , computer science , programming language
Summary We report enhanced thermal conductivity of of low‐density polyethylene (LDPE) with granulated graphene. The morphological analysis of the nanocomposite releveled granulated graphene is dispersed in LDPE and randomly oriented. The melt processing has reduced the filler's lateral size. At 40 wt. % loading of granulated graphene, the nanocomposite thermal conductivioty (κ c ) reached 2.91 W/m.K, corresponding to ~1000% increase overLDPE. This very high enhancement is attributed to the reduction in the polymer/filler's thermal interfacial resistance due to the graphene sheets' broad size distribution. The experimentally measured κ c was compared theoretically predicted. The theoretical model provided reasonable prediction of κ c versus the filler loading. Furthermore, hybrid fillers on binary and ternary combinations of graphene, graphene nanoplatelets, and micrographite with granulated graphene were also prepared. The hybrid fillers revealed that fillers with similar shape and different aspect ratios did not display any synergetic κ c .