چكيده به لاتين
In the present study, alumina-gamma nanorods were synthesized in situ by hydrothermal method and ready-made graphene oxide was added to it. First, alumina gamma nanorods were synthesized by hydrothermal method. The process is performed by placing the precipitate from the chloride salt titration of the company with sodium hydroxide in an autoclave at a temperature of 20℃ for 3 hours and calcination at a temperature of 600℃ and finally powder was washed. Necessary characterizations were performed from the synthesized alumina samples. Alumina reinforcement with different weight percentages of 0.5, 1 and 2 was added to the field (epoxy resin) to evaluate the optimal weight percentage.Epoxy sample with 0.5% by weight of reinforcement, had the best strength result and about 19% increase in tensile strength. In situ synthesis process of alumina-graphene oxide hybrid, similar to the working steps of alumina nanorods, this time is done by adding pre-prepared graphene oxide and the desired characterizations for this hybrid are done with different weight ratios of 1, 3, 5 and 7 are synthesized from GO / Al2O3.Synthesized hybrids with 0.5% by weight that were selected as the optimal weight percentage entered the epoxy resin substrate and after tensile test, the tensile strength results for the ratios of 1, 3, 5 and 7 respectively were 19, 16.4, 15.5, And 13.5 MPa.The results of tensile test of the hybrid-reinforced sample show an improvement with increasing Al2O3 / GO ratio, but in all ratios they have less strength than unreinforced resin. The reason is due to the images taken from the fracture surface of the samples to factors such as excessive accumulation of alumina nanorods on the surface of the graphene bed and lack of contact of the resin with graphene sheets, as well as the layered structure and adhesion of graphene sheets also It is on top of each other that can cause slipping and reduce the effect of resistance to stress.
