Effects of graphene reduction degree on thermal oxidative stability of reduced graphene oxide/silicone rubber nanocomposites

Abstract

In this work, graphene oxide (GO) was prepared with a modified Hummers method and then reduced to different reduction degree by thermal treatment. The GO and reduced GO (RGO) samples were introduced into silicone rubber (SR) matrix to prepare nanocomposites. X-ray photoelectron spectroscopy, Raman spectra, X-ray diffraction, and transmission electron microscopy measurement were performed to detect the structure and morphology changes of GO and RGO sheets. The results showed that the reduction removed most of the oxygen-containing functional groups on the surface of GO, especially C-O-C group, and thus reestablished a graphitic network of sp 2 hybrid; by increasing the reduction temperature, the reduction degree of GO was increased, and meanwhile, the extent of exfoliation was increased. More importantly, tensile testing and thermogravimetric analysis revealed that RGO improved the mechanical properties and thermal oxidative stability of SR nanocomposites. The improvement enhanced with increasing the reduction degree of GO simultaneously.

Total Determination of Estrogenic Phenolic Compounds in River Water Using a Sensor Based on Reduced Graphene Oxide and Molecularly Imprinted Polymer

“…Obtaining the rGO was done from the GO by heat treatment . Initially, approximately 10.0 mg of GO were placed in a crucible and inserted into a preheated muffle furnace at 350 °C.…”

Effect of the sheet size on the thermal stability of silicone rubber–reduced graphene oxide nanocomposites

“…The processing of the rupture of side groups needed more heat, so the SR–LrGO nanocomposites showed three peaks in DTG compared with the other samples. rGO also played the role of physical crosslink points in the nanocomposites, so the dispersion and compatibility of the rGO sheets in the SR matrix were very important . As we discussed previously, the LrGO sheets had a poor dispersion state and compatibility in SR.…”

“…The results presented in Table further certify that the thicknesses of the different sheets were similar. Moreover, according to our previous works, the different rGO sheets prepared with the same conditions contained the same amounts of oxygen‐containing functional groups after thermal reduction …”

Effect of oxygen functional groups of reduced graphene oxide on the mechanical and thermal properties of polypropylene nanocomposites

“…The interfacial interaction between filler and PP matrix can also be evaluated from the SEM images . There is present a distinct boundary between GO (or RGOA) and PP matrix as well as pull‐out fillers on the fracture surface, indicating the poor interfacial adhesion . However, no obvious separated interface is observed between RGOH and PP matrix, which shows the strong interfacial adhesion between RGOH and PP matrix.…”