A study on interfacial behaviors of epoxy/graphene oxide derived from pitch-based graphite fibers

Abstract

Graphene oxide (GO) is a versatile material with inherent unique properties that can be used in a wide range of applications. GO is produced from graphitic materials including graphite, and its properties can depend on the nature of stacking in the graphene structures. In this study, GO was prepared from pitch-based graphite fibers via the modified Hummer’s method and subsequently incorporated into an epoxy matrix to obtain graphene-loaded nanocomposites (EP/GO). Presented experimental results revealed that the addition of 0.6 wt% GO yielded an ∼110% increase in the fracture toughness. The corresponding fracture energies as well as the flexural strengths and flexural modulus exhibited similar trends to the fracture toughness. The thermophysical properties of the EP/GO, to further demonstrate the reinforcing effectiveness of GO, were also observed. Collectively, these results indicate that GO investigated in the study can be a viable reinforcement candidate to develop next-generation nanocomposites with multifunctional properties.

Enhanced Electrical Properties and Impact Strength of Phenolic Formaldehyde Resin Using Silanized Graphene and Ionic Liquid

“…The atomic C/O ratio calculated from the C 1s and the O 1s peaks in the XPS spectra decreased from 12.61 for pristine graphene to 2.87 for Si-graphene. These results can be explained by the fact that, after surface modification with the silane coupling agent, oxygen-containing functional groups, such as CO, C–O, and Si–O, were introduced to the graphene surface, ,, reducing the intensity of the C 1s peak and increasing the intensity of the O 1s and Si 2p peaks.…”

A Study on Pre-Oxidation of Petroleum Pitch-Based Activated Carbons for Electric Double-Layer Capacitors

“…The D-band is caused by a defect of graphitic structures, whereas the G-band is associated with the in-plane bond-stretching of sp 2 hybridized graphitic structure. The relative intensity of D- and G-band (I D /I G ) is often used to estimate the degree of defects in carbon frameworks [ 52 , 53 ]. The I D /I G ratios of PP and OPP were 0.82 and 1.05, respectively.…”

Advancement of the Power-Law Model and Its Percolation Exponent for the Electrical Conductivity of a Graphene-Containing System as a Component in the Biosensing of Breast Cancer

“…Carbon nanotubes (CNT) have a tubular structure of carbon atoms [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 ]. However, graphene 2D nano-sheets in the form of sp 2 carbon show wonderful electronic, unique mechanical, significant thermal and good chemical properties [ 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 ]. Thus, polymer nanocomposites containing graphene can be applied in different technologies such as transparent electronics, electromagnetic interference shielding, energy devices, light emitting diodes and lightning protection [ 19 , 20 , 21 , 22 , 23 ].…”