Graphene-Based Nanocomposites: Synthesis, Mechanical Properties, and Characterizations

Abstract

Graphene-based nanocomposites possess excellent mechanical, electrical, thermal, optical, and chemical properties. These materials have potential applications in high-performance transistors, biomedical systems, sensors, and solar cells. This paper presents a critical review of the recent developments in graphene-based nanocomposite research, exploring synthesis methods, characterizations, mechanical properties, and thermal properties. Emphasis is placed on characterization techniques and mechanical properties with detailed examples from recent literature. The importance of characterization techniques including Raman spectroscopy, X-ray diffraction (XRD), atomic force microscopy (AFM), scanning electron microscopy (SEM), and high-resolution transmission electron microscopy (HRTEM) for the characterization of graphene flakes and their composites were thoroughly discussed. Finally, the effect of graphene even at very low loadings on the mechanical properties of the composite matrix was extensively reviewed.

Comparison of Properties of Colorless and Transparent Polyimide Nanocomposites Containing Chemically Modified Nanofillers: Functionalized-Graphene and Organoclay

“…Graphene and clay are well-established nanofillers. Owing to a surface area, thermal conductivity, and electrical conductivity of 2630 m 2 /g, 5000 W m/K, and 6000 S/cm, respectively, single-layer graphene harbors the excellent potential for applications, such as materials for gas barriers, transparent electrodes, and solar cells as a filler in polymeric nanocomposites [16][17][18]. However, because graphene is a two-dimensional aggregate of carbon, it is necessary to increase the compatibility thereof with the polymer matrix through chemical or physical modification for viable incorporation into a nanocomposite material and to prevent micro-phase separation.…”

Recent Advances on Thermally Conductive Adhesive in Electronic Packaging: A Review

“…Epoxy with hybrid graphene oxide (GO) and CNT filler system are the most popular techniques that make TIM a combination with GO covering and epoxy/graphene flakes. Also, the thermal conductivity value depends on the filler [130], alignment [131], interaction between filler and matrix [132], graphene layer number and particle size [133]. A summary of research output from recently published works on carbon-based fillers are given in Table 3.…”

Enhanced Heat Dissipation Performance of Automotive LED Lamps Using Graphene Coatings

“…Like a typical GN, the G peak and 2D peak appear around 1582 cm −1 (1583 cm −1 ) and 2700 cm −1 (2708 cm −1 ), respectively. Furthermore, the I 2D /I G of single-layer GN is greater than 1, and the I 2D /I G of few-layer GN is greater than 0.5 [ 34 , 35 , 36 ]. Since the GN used in this study has I 2D /I G = 0.599, it can be confirmed that the few-layer GN meets the specifications declared by the supplier because GN exhibits a flake-powder morphology with a defect peak (D peak) at 1345 cm −1 , and its I D /I G = 0.077.…”