Incorporation and optimization of RGO and GO in SSBR/NR composites expands their applicability

Abstract

Natural rubber (NR) has poor mechanical properties, which limits its practical application. Filler blending is a simple method that improves the inherent properties of natural rubber and expand its applicability. Using the mechanical mixing process, the effects of graphene oxide (GO) and redox graphene (rGO) on the physical properties, electrical conductivity, thermal conductivity, and air permeability of styrene-butadiene rubber (SSBR)/NR composites were studied. The results show that rGO exhibits efficient filler properties in various aspects, for example, the optimal filling amount of rGO and GO was 1.5 phr. In addition, rGO filled SSBR/NR composites showed satisfactory filler dispersibility. Notably, the better dispersibility of rGO was because of fewer hydrophilic functional groups on the surface which were difficult to agglomerate. The increase of rGO and GO content increased the maximum torque (MH) and minimum torque (ML) of the composite material, and decreases tc90 and tc10. The Payne effect of GO/SSBR/NR composites is more obvious than that of rGO/SSBR/NR composites. In addition, we found that the content of rGO (GO) reached saturation at 2phr. Notably, rGO and GO improved the properties of rGO filled SSBR/NR composites such as the tensile strength of rGO/SSBR/NR composites to 23.9 MPa. This shows the potential application of SSBR/NR composites in wearable electronic devices.

The improved thermal conductivity and heat dissipation capacity of elastomer‐based thermal interface materials through promoting the surface interactions and complete networks

“…These results fundamentally indicate that the improved surface interaction between rGO‐MB and NR, as well as the three‐dimensional network of rGO‐MB, played a pivotal role in enhancing thermal conductivity. In Figure 5D, we have summarized recent works for comparison, demonstrating the advantages of our approach in achieving significant thermal conductivity enhancement at low filler loadings 33–44 . To gain a better understanding of the thermal dissipation ability, we recorded the changes in surface temperature during the heating and cooling processes.…”

“…In Figure 5D, we have summarized recent works for comparison, demonstrating the advantages of our approach in achieving significant thermal conductivity enhancement at low filler loadings. [33][34][35][36][37][38][39][40][41][42][43][44] To gain a better understanding of the thermal dissipation ability, we recorded the changes in surface temperature during the heating and cooling processes. As illustrated in Figure 5E,F, rGO-MB/NR TIMs exhibited remarkable sensitivity to temperature variations compared with other TIMs.…”

The Role of Reduced Graphene Oxide in Enhancing the Mechanical and Thermal Properties of a Rubber Cover Joint

“…The dispersion of rGO in the rGO/NR raw rubber composites was observed using a scanning electron microscope (SEM) [ 24 ]. Before observation, an rGO rubber sheet with a thickness of 3 mm was subjected to liquid nitrogen low-temperature brittle fracture and gold-spraying treatments, and the fracture surface morphology was observed at 10 kV voltage.…”