Size effects of graphene nanoplatelets on the properties of high-density polyethylene nanocomposites: Morphological, thermal, electrical, and mechanical characterization
Küçük Resim Yok
Tarih
2020
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Beilstein-Institut Zur Forderung der Chemischen Wissenschaften
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
High-density polyethylene (HDPE)-based nanocomposites incorporating three different types of graphene nanoplatelets (GnPs) were fabricated to investigate the size effects of GnPs in terms of both lateral size and thickness on the morphological, thermal, electrical, and mechanical properties. The results show that the inclusion of GnPs enhance the thermal, electrical, and mechanical properties of HDPE-based nanocomposites regardless of GnP size. Nevertheless, the most significant enhancement of the thermal and electrical conductivities and the lowest electrical percolation threshold were achieved with GnPs of a larger lateral size. This could have been attributed to the fact that the GnPs of larger lateral size exhibited a better dispersion in HDPE and formed conductive pathways easily observable in scanning electron microscope (SEM) images. Our results show that the lateral size of GnPs was a more regulating factor for the above-mentioned nanocomposite properties compared to their thickness. For a given lateral size, thinner GnPs showed significantly higher electrical conductivity and a lower percolation threshold than thicker ones. On the other hand, in terms of thermal conductivity, a remarkable amount of enhancement was observed only above a certain filler concentration. The results demonstrate that GnPs with smaller lateral size and larger thickness lead to lower enhancement of the samples' mechanical properties due to poorer dispersion compared to the others. In addition, the size of the GnPs had no considerable effect on the melting and crystallization properties of the HDPE/GnP nanocomposites. © 2020 Evgin et al.
Açıklama
Anahtar Kelimeler
Electrical properties, Graphene nanoplatelets, Mechanical properties, Polymer matrix composites (PMCs), Thermal properties, Aliphatic compounds, Density (specific gravity), Dispersions, Electric conductivity, Electric properties, Graphene, Graphene Nanoplatelets, High density polyethylenes, Mechanical properties, Nanocomposites, Percolation (computer storage), Percolation (fluids), Scanning electron microscopy, Solvents, Thermal conductivity, Thermodynamic properties, Electrical conductivity, Electrical percolation threshold, High density polyethylene(HDPE), Mechanical characterizations, Melting and crystallization, Percolation thresholds, Polymer Matrix Composites (PMCs), Thermal and electrical conductivity, Polymer matrix composites
Kaynak
Beilstein Journal of Nanotechnology
WoS Q Değeri
Scopus Q Değeri
Q2
Cilt
11
