Mode I and Mode II interlaminar fracture behavior of E‐glass fiber reinforced epoxy composites modified with reduced exfoliated graphite oxide

Abstract

In this article, Mode I and Mode II interlaminar fracture toughness, interlaminar shear strength, flexural strength and the flexural modulus of continuous unidirectional E‐glass fiber reinforced epoxy composites modified with three different graphite oxide (GO) fillers were investigated. GO was prepared through modified Hummers' method followed by thermal exfoliation at 200°C to produce exfoliated GO (EGO). Further, EGO was chemically reduced to result in reduced EGO (rEGO). Incorporation of GO and EGO fillers exhibited significant improvement in the mechanical properties of the composites. Remarkable enhancement in mechanical properties was observed with rEGO fillers, where Mode I and Mode II fracture toughness values of composites were increased by 65% (0.5 wt%) and 54% (0.25 wt%), respectively. Studies on nanofillers distribution in the matrix resin and the examination of fracture surfaces of specimens were carried out with field emission scanning electron microscopy. POLYM. COMPOS., 39:E2506–E2518, 2018. © 2018 Society of Plastics Engineers

Glass Fibre Reinforced Epoxy Composites Modified with Graphene Nanofillers: Electrical Characterization

“…The above results can be explained with the understanding of the key differences possessed by these three filler materials, GO, EGO, and rEGO. The critical characterization of the GO, EGO, and rEGO fillers was conducted, and the results were discussed in our earlier works [21]. In brief, GO fillers are observed with oxygen-containing functional groups such as hydroxyl, epoxide, carbonyl, and carboxyl groups with disordered morphology.…”

“…Different variants of graphene prepared in the laboratory are used for the work. All the materials used in this work are the same as mentioned in our earlier published work [21,22]. The materials and the method description partly reproduces the wording [21,22].…”

“…Hybrid glass fibre-reinforced epoxy composites were fabricated by varying concentrations of GO, EGO, and rEGO fillers at 0.5, 1, and 2.5 wt.%, respectively, through a simple hand layup method using the vacuum bagging technique. The fabrication methodology of composite laminates is the same as discussed in our earlier work [21,22]. The composites prepared for different electrical tests have used 4 fabric plies to produce laminate thicknesses in the range of 1-1.3 mm.…”

“…Supporting Information. The materials used, preparation of graphene nanofillers, fabrication of composites and characterization of nanofillers are clearly discussed in our earlier publications [21,22]. The hyperlinks for the same is as followed: 21. doi:10.1002/pc.24809 22. doi:10 .1016/j.compscitech.2019.04.034…”

Recent Progress in the Study of Thermal Properties and Tribological Behaviors of Hexagonal Boron Nitride-Reinforced Composites

“…Tang et al reported a laminated hybrid GF/spherical h-BN/epoxy composite, made by blending-impregnation and hot compression. The as-fabricated composite exhibited considerable improvement in both vertical (3 Glass Fiber cloth (GF)/epoxy is one of the highly demanded functional composites in a wide range of applications such as aerospace, electronics, and electrical fields due to its superior chemical inertness and electrical resistivity [79]. However, these PMCs suffer from poor interfacial adhesion to the epoxy matrices causing a gradual degradation in the mechanical properties and lowering the TC [80].…”