Effects of Graphenes/CNTs Co-reinforcement on Electrical and Mechanical Properties of HDPE Matrix Nanocomposites

Abstract

In this work, mechanical and electrical properties of graphenes (GP)/carbon nanotubes (CNTs) co-reinforced high density polyethylene (HDPE) matrix composites were studied. The microstructure, morphologies, and electric properties of the composites were evaluated by XRD, TEM, and 4-probe methods, respectively. It was found that the electric resistivity of 0.5 wt %-GP/HDPE was immeasurable, and 2.0 wt %-CNTs/HDPE showed high resistivity (6.02 × 10 4 Ω·cm). Meanwhile, GP (0.5 wt %)/CNTs (2.0 wt %)/HDPE showed excellent low resistivity (3.1 × 10 2 Ω·cm). This result indicates that the co-reinforcement systems can dramatically decrease electric resistivity of the carbon/polymer nanocomposites.

Effects of Mixing Ratio of Hybrid Carbonaceous Fillers on Thermal Conductivity and Mechanical Properties of Polypropylene Matrix Composites

“…A previous report [ 30 ] confirmed that when carbon nanotubes and graphite platelets were mixed, electromagnetic interference shielding properties significantly improved at a specific ratio of the two fillers. That is, when mixing different types of fillers with different shapes, the dispersion degree of the fillers can be significantly enhanced at a golden mixing ratio so that a pathway for electric conduction is effectively formed.…”

Reinforcement effect and synergy of carbon nanofillers with different dimensions in high density polyethylene based nanocomposites

“…The synergistic role of CNTs in improving the electrical conductivity of LDPE/GNP composites prepared by melt mixing was also observed in Haznedar's study [17]. At present, a large number of studies of polymer/carbon nanofiller composites have been reported, however much fewer reports have been published on the comparison of the reinforcement effect of carbon nanofillers with different dimensions [14,18,19] and polymer composites filled with hybrid carbon nanofillers [16,17,20].…”

“…In order to achieve lower cost or a better balance of properties, the incorporation of hybrid carbon nanofillers with different dimensions is a possibility in preparing multifunctional polymer composites. Kim et al [16] found that the HDPE composites filled with 0.5 wt.% GNPs and 2 wt.% CNTs exhibited a low electrical resistivity of 3.1 • 10 2 X • cm, while the unary carbon nanofiller reinforced composites filled with 0.5 wt.% GNPs or 2 wt.% CNTs alone showed a high resistivity. The synergistic role of CNTs in improving the electrical conductivity of LDPE/GNP composites prepared by melt mixing was also observed in Haznedar's study [17].…”

Exfoliated graphite nanoplatelets/poly(arylene ether nitrile) nanocomposites

“…It is well known that carbon-based nanomaterials have substantial advantages in reinforcing the polymer matrix in terms of mechanical properties, and so on. [26][27][28][29][30] For graphite nanosheets or nanoplatelets, in particular, the super mechanical modulus and high aspect ratio led to a significant increase in the mechanical properties of polymer composites. To inspect the tensile properties of xGnP/PEN films, a 10-cm long and 1-cm wide nanocomposite film with the thickness of 10 mm was chosen for the tensile properties testing.…”