Tuning Electrical and Thermal Properties in Epoxy/Glass Composites by Graphene-Based Interphase

Abstract

Abstract:Multiscale epoxy/glass composites were fabricated by using E-glass fibers (GF) coated with different types of graphene nanosheets deposited by electrophoretic deposition. Graphene oxide (GO) was first synthesized using modified Hummer's method and its subsequent ultrasonication in de-ionized water created a stable suspension of GO. GF were immersed in the water/GO suspension near a copper anode. The electrical potential applied between the electrodes caused GO to migrate towards the anode. Moreover, the GO coated yarns were exposed to hydrazine hydrate at 100 • C to obtain reduced graphene oxide (rGO) coated yarns. Both GO and rGO coated GF yarns were used to create unidirectional epoxy-based multiscale composites by hand lay-up. The presence of a conductive rGO coating on GF improved both the electrical and thermal conductivities of composites. Moreover, enhanced permittivity was obtained by rGO based epoxy/glass composites, thus giving the option of using such structures for electromagnetic interference shielding.

Temperature Dependent Strain/Damage Monitoring of Glass/Epoxy Composites with Graphene as a Piezoresistive Interphase

“…It can therefore be concluded that the samples are characterized by a similar morphology. As documented in a previous paper [45], even when observing the cross sections by SEM, it was not possible to get a reliable measure of the thickness of the rGO layer.…”

“…It can therefore be concluded that the samples are characterized by a similar morphology. As documented in a previous paper [45], even when observing the cross sections by SEM, it was not possible to get a reliable measure of the thickness of the rGO layer. Thermal stability of the composites was evaluated through thermogravimetric analysis (TGA), and the most important parameters are summarized in Table 4.…”

The Effect of Interaction between Nanofillers and Epoxy on Mechanical and Thermal Properties of Nanocomposites: Theoretical Prediction and Experimental Analysis

“…Epoxy matrix composites are one of the most common thermosetting polymers that are widely used because of properties including solvent resistance, thermal stability, and high tensile strength and still new research continues to improve these properties [1][2][3][4][5][6]. These characteristics made epoxy composites to be used in industrial applications such as adhesives, coatings, electronics, encapsulation, and laminates.…”

On Tribological Behavior of Synthetic Fiber Reinforced Polymer Composites Modified With Fillers, A Review

“…Since the polymer matrix essentially needs to resist higher loads, it is normally reinforced with fibers and fillers. Polymer composites reinforced with synthetic fibers made up of glass [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20], carbon [21][22][23][24][25][26][27][28][29][30], aramid [31][32][33][34] etc. are being extensively deployed in engineering applications because of their exceptional mechanical performance.…”