پديدآورندگان :
Shokrieh Z Composites Research Laboratory, Center of Excellence in Experimental Solid Mechanics and Dynamics, School of Mechanical Engineering, Iran University of Science and Technology, Tehran, 16846-13114, Iran , Shokrieh M.M Composites Research Laboratory, Center of Excellence in Experimental Solid Mechanics and Dynamics, School of Mechanical Engineering, Iran University of Science and Technology, Tehran, 16846-13114, Iran , Zhang Z National Center for Nanoscience and Technology, China, Beijing 100190, P. R. China , Zhao Z School of Chemical Engineering, Shandong University of Technology, 255049 Zibo, Shandong, P. R. China
كليدواژه :
Hybrid nanocomposites , Creep resistance , Recovery , DMA.
چكيده فارسي :
In the present study, the improvement creep resistance and recovery behaviors of epoxy resin by adding
graphene (G) and carbon nanotubes (CNTs) have been investigated. Four different hybrid nanocomposites, namely 0.1
wt.% G + 1 wt.% CNT / epoxy (Sample #1), 0.25 wt.% G + 1 wt.% CNT / epoxy (Sample #2), 0.5 wt.% G + 1 wt.%
CNT / epoxy (Sample #3) and 0.5 wt.% G + 0.5 wt.% CNT / epoxy (Sample #4) were manufactured and tested. Nano
fillers were dispersed into the resin by an ultrasonic apparatus. For each nano fillers with different weight fraction, the
optimum sonication time was found. Tensile creep tests were carried out at 85 oC using a DMA apparatus for an hour
and after that the constant load was removed and the strain recovery of samples was measured. Experimental
observations on sample #4 showed the best improvement on creep resistance (64%) and recovery (71%) behaviors
more than the other samples. Finally, using the Burger and Weibull models were used to fit the test data to predict the
long-term creep and recovery strains.
