Elastic and strength properties of MXene/CNT reinforced epoxy/glass fibre based nanocomposites: Experimental and analytical study

Abstract

In the current work, the strength and elastic properties of MXene/CNT reinforced epoxy/glass fibre based nanocomposites were investigated using experimental and analytical approach. To achieve this, the Halpin-Tsai model and Chamis model was employed to evaluate the mechanical properties of two -phase (MXene-CNT)/Epoxy composite and three-phase (MXene-CNT)/Epoxy/Glass fibre composite. The accuracy of the analytical model was verified by comparing the results with the experimental data. To study the strength properties of the composites in detail, experimental tensile and flexural tests were carried out. Finally, a parametric study was performed to investigate the influence of weight fractions and aspect ratios on the elastic properties of MXene/CNT reinforced composites. It was observed that the MXene/CNT reinforced glass/epoxy based composite exhibited higher load bearing capacity as compared to neat glass/epoxy composite for all the performed mechanical tests. The tensile, shear and flexural modulus of MXene/CNT reinforced laminated composite were found to be 17.2%, 15.6%, and 16.2%, higher in comparison to the neat glass/epoxy laminated composite. The addition of nano-fillers exerted positive impact on the elastic properties of both the two-phase and three-phase nanocomposites and the properties kept on improving with weight fraction of the nano-fillers. Regarding the impact of aspect ratio on elastic modulus, however, conflicting findings were noted. Increase in the aspect ratio, on one hand, resulted in an increase in the longitudinal elastic modulus; on the other hand, it resulted in a monotonous reduction in the shear modulus.