Study On Nano-Particle Modified Epoxy Resin

Epoxy resin is well known in engineering materials because of its excellent mechanical property, bonding property and electrical property. It is widely used in military, industrial and civil fields.Nano-particles began to appear in1980s. Because of its special property, nano-particles as a material of resin reinforcement can improve the toughness, intensity and thermal property. In this experiment, nano-silica and carbon nano-tube were added into epoxy resins to modified the property. The results were showed as following:1.When the additive amount of nano-silica was3%, the tensile strength reached the maximum and increased by10.7%; the breaking elongation reached the maximum and increased by25.3%; the impact intensity also reached the peak value of44.6KJ/M2and the impact intensity was increase by17.8%; the bending strength that reached the peak value of165.8MPa and the elastic modulus that reached the peak value of3894MPa were both increased by19.7%and30.6%respectively. 2.After being added with nano-silica, the glass transition temperature of the system increased. The glass transition temperature was increased by12.6℃when the additive amount of nano-silica was3%.3.When the additive amount of carbon nano-tube was1%, the tensile strength whose peak value was122MPa was increased by35.6%compared with that of the pure epoxy resin.4. When the additive amount of carbon nano-tube was0.5%, the bending strength was150.3MPa which was increased by8%compared with the pure epoxy resin. Besides, the elastic modulus was3058MPa and the impact intensity was43.7KJ/M2which was increased by15.9%compared with the epoxy resin added with carbon nano-tube.5.When the additive amount of carbon nano-tube was0.5%, the glass transition temperature reached the peak value of112.5℃which was increased by19.3℃.6.Nano-particles disperse uniformly in the resin. When the material is acted by the external force, the nano-particles can absorb most of the energy. Craze appears the moment the external nano-particles are able to hinder the extension of the caze, and then enhance the mechanical property.