Enhancements of the mechanical properties and thermal conductivity of carboxylated acrylonitrile butadiene rubber with the addition of graphene oxide

Abstract

Graphene oxide (GO)/carboxylated acrylonitrile butadiene rubber (xNBR) vulcanizates were prepared in this study by mixing exfoliated GO aqueous dispersion with xNBR latex. The GO monolayers were exfoliated from natural flake graphite by Hummers' method. This study shows that GO could be dispersed homogeneously in xNBR matrix up to 1.2 vol.%. Adding GO nanosheets has a great effect on the mechanical, thermal stability, thermal conductivity, and thermal diffusivity of GO/xNBR vulcanizates. With the incorporation of GO nanosheets, the thermal stability, thermal conductivity, and thermal diffusivity of GO/xNBR vulcanizates increased significantly. The mechanical property of GO/xNBR vulcanizates reached its peak with 1.2 vol.% of GO content. The addition of 1.2 vol.% of GO nanosheets largely enhanced the tensile strength and modulus at 100 % elongation of xNBR by more than 370 and 230 %, respectively. The thermal conductivity and diffusivity of the GO/xNBR vulcanizates with 1.6 vol.% of GO had 1.4- and 1.2-fold improvements, respectively, compared to that of unfilled xNBR vulcanizate. © 2012 Springer Science+Business Media New York

Natural rubber/graphene oxide composites: Effect of sheet size on mechanical properties and strain-induced crystallization behavior

“…It is interesting to find that the elongation at break of NR/GO nanocomposite decreases with decreasing GO size. Previous studies also found that the addition of GO into rubber led to a decrease in the elongation at break of the composites, which is because the movement of the polymer chains is restricted by the interaction between the GO and polymer matrix [16,48]. Therefore, in our work, it can be understood that GO with smaller size have more number of contacts with NR, which in turn leads to stronger restriction on the rubber chains.…”

Study on the supercooling degree and nucleation behavior of water-based graphene oxide nanofluids PCM

“…In most published papers, additives contained in nanofluids are usually zero dimensional nanoparticles or one dimensional carbon nanotubes or nanowires (Chandrasekaran et al, 2014;Kumaresan et al, 2012;Shaikh et al, 2008). Graphene oxide nanosheet is a two dimensional material with many unique physical, chemical and mechanical properties, which may cause to quite different thermophysical properties from other nanomaterials (Wang et al, 2013;Heo et al, 2012;Tasviri et al, 2013;Mehrali et al, 2013). To the best of our knowledge, there is no paper reporting the supercooling and nucleation behavior of nanofluids containing graphene oxide nanosheets.…”

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

“…It was shown that owing to the large amount of oxygencontaining groups, graphene nanoribbon could uniformly disperse in matrix and had interactions with matrix, thus the thermal stability of SR was improved. Wang et al 15 reported that GO improved the thermal stability of carboxylated acrylonitrile butadiene rubber vulcanizates. It was attributed to the interactions between the rubber matrix and the fillers, which is connect with exfoliation, aspect ratio of GO, and the hydrogen bonding between GO and the polymer.…”