Influence of clay nanoparticles on morphology and mechanical properties of rezole phenol formaldehyde resin/carbon and glass hybrid short fibers nanocomposites

In this research, nanocomposite samples made of rezole phenol formaldehyde resin (Phenolic) (PF)/short carbon and glass hybrid fibers (CGF) with clay nanoparticles reinforced by sintering and molding method with high pressure and temperature have been performed. The results showed that short carbon and glass hybrid fibers in phenolic resin, two important characters including failure strain and final strength, compared to samples without hybrid fiber carbon and glass improved and an optimal sample is extracted. From the XRD and EDX spectra, it was found that with the increase in the weight percentage of clay nanoparticles, the peak intensity increased, that is, the dispersion of nanoparticles in the matrix has increased. Also, SEM photograph showed that with the presence of clay nanoparticles in the composite, the amount of adhesion and penetration between the matrix and the fibers increased that this has increased the strength composite. The results obtained for nanocomposite samples with hybrid fibers reinforced with 1 wt% of clay nanoparticles, modulus of elasticity for tensile test about 12%, for bending test about 27% and for buckling test increased about 16% compared to composite samples without nanoparticles. The results of impact test also showed that the nanocomposite sample reinforced with 1 wt% of clay nanoparticles had the highest energy absorbed compared to other samples.