Mechanical Properties of Glass-Fiber-Reinforced Epoxy Resin Composites Filled with Nanoparticles
To investigate the mechanical properties of nanoparticle-filled glass-fiber-reinforced epoxy resin composites(GFRP),tensile,compressive,bending and impact experiments were carried out for nano/GFRP materials with different nanoparticle mass fractions(0.1%,0.2%,0.5%,1.0%).Nanoparticles include nanometer iron oxide(NFe),nanometer silicon dioxide(NS)and multi-walled carbon nanotubes(MWCNT).Scanning electron microscope(SEM)was also applied to analyze the influences of nanoparticle types and mass fractions on the sample mechanical properties.The results show that tensile strength of samples increases and then decreases with the increase of nanoparticle mass fractions.The good dispersion of nanoparticles and the cohesion between nanoparticles and resin can improve the sample tensile strength.However,the addition of excessive nanoparticles leads to particle accumulation,reducing the sample tensile strength.Compared with sample GFRP,the increase amplitudes of compressive strength of MWCNT/GFRP whose nanoparticle mass fractions are 0.1%,0.2%,0.5%and 1.0%are 25.31%,36.04%,26.84%and 27.25%,respectively.And the increase amplitudes of bending strength are 58.74%,63.21%,40.89%and 43.11%,respectively.The incorporation of nanoparticles improves the sample compressive strength,bending strength and impact strength,but different particle types and mass fractions lead to different improvement effects of mechanical properties.The SEM results show that the fibers under external loading show fracture and delamination phenomena,the friction effect between fibers and nanoparticles enhances the sample mechanical properties,and the accumulation of particles decreases the sample mechanical properties.
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