The effect of nano graphene particles on the Physical and mechanical of high density polyethylene-rapeseed stalk flour composites

The purpose of this study, was to investigate the effect of graphene nanoparticles (NG) on mechanical properties of composites made from rapeseed stalk flour (RSF) and high density polyethylene (HDPE). To meet this objective, the RSF and HDPE at 50 wt%, coupling agent (3phc) and various amounts of NG (0, 0.5, 1, 1.5 and 2 phc) were mixed via hake internal mixer, and then the specimens were prepared using injection molding. The morphology of samples was characterized using field emission scanning electron microscope (FE-SEM). The physical and mechanical characterization including water absorption, thickness swelling, tensile, flexural strength, and unhocked impact resistance were performed. In addition, the field emission scanning electron microscope (FE-SEM) was used to study the distribution of graphene nanoparticles in the composite. The results showed that by increasing the amount of nanographene the tensile modulus, flexural modulus, tensile strength, and flexural strength of the composite were increased while the impact strength, water absorption and thickness swelling of the samples decreased.FE-SEM micrographs showed that the using of 1 wt% NG improved the adhesion between the filler and the polymer matrix. However, in the higher amount contents (>1%), nanographene particles tend to accumulate.