Analysis Of Properties And Production Of Nano-Al₂O₃ Filled Epoxy Resin Composites

As an important member of this family, epoxy exhibits outstandingmechanical and adhesive properties, resistance of its nano-particle filledversions. Owing to the large surface area, nano-particles might stronglyadhere to epoxy, and hence improve the physical and mechanical properties(e.g. strength, toughness and heat distortion temperature) of the matrixgreatly. Meanwhile, the wear resistance would also be enhanced. It should benoted that the high surface energy of nano-particles facilitates the formationof nano-particle agglomerates, which might bring negative effects to themechanical and wear properties of epoxy. Therefore, the present work isfocused on the reinforcement of the agglomerates themselves and theinterfacial interaction between the filler particulates and the matrix by meansof irradiation grafting polymerization onto the nano-particles. It is hoped todiminish the possible flaws introduced by the nano-particle agglomerates andincrease the properties of the composites simultaneously.In this experiment, the epoxy/ polyamide polymers firstly were preparedat different temperature. Secondly, the epoxy compositions filled differentcontents nano-Al2O3 were prepared at different temperature. The impactelongation and wear performance of polymers and compositions were testedby JSM5310 tester. Wear performance of polymers and compositions weretested by MM200 testerWe prepared the epoxy/ polyamide polymers at different temperature atfirst. We test the mechanical performance of the polymers by impactexperiment and elongation experiment. Then we make impact and drawexperiments. We observe the disperse of nano-Al2O3, and attempt to explain theeffect and mechanism of how nano-alumina improving the intensity andtoughness of the samples. The present experiments results indicate that it canbe improved that mechanical performance of nano-Al2O3/epoxy composite.Resin-based composites were prepared using untreated and two kinds oftreated nanometer Al2O3 particulates as the fillers. Thus the nanometer Al2O3particulates were treated with silane coupling agent KH550. Hence the filledcomposites(7%nano-Al2O3) had much better friction and wear behaviorsthan the epoxy resin matrix. Specifically, the composite filled withchemically grafted nano-Al2O3 particulates showed the best friction-reducing and antiwear behavior, which was attribute to the increasedinterfacial bonding between the modified particulates and the epoxy resinmatrix. Moreover, the inclusion of the nanometer Al2O3 particulates led to atransition of the wear mechanisms from severe adhesion wear and peeling offto fatigue wear, which also contributed to increase the wear resistance of thecomposites.If we can controll the holes in the epoxy resin composites, the propertiescan be improved further.