Effect of different curing temperatures on the damping properties of graphene oxide‐carbon fiber/epoxy resin composites

Abstract

In this paper, five groups of graphene oxide‐carbon fiber/epoxy resin (GO‐CF/EP) composites with different curing temperatures were prepared by the vacuum infiltration hot‐press system (VIHPS). These five groups of composites presented satisfactory macroscopic morphologies. However, the microstructure of the GO‐CF/EP composite cured at 110°C was satisfactory because there was no obvious infiltration defect. The damping properties of these composites were tested by force hummer method. When the curing temperature was 110°C, the composite had a maximum damping ratio of 0.21%, while the composite cured at 130°C had a minimum damping ratio of 0.13%, which decreased by 35.89%. In addition, when the curing temperature was higher, the damping properties of the composite were also worse than that of the composite cured at lower temperature. Because the curing temperature was different, the infiltration effect of resin in the fiber was various, and the energy dissipation ways in the composite material was different, which was reflected in the damping properties.

Effect of hybrid ratio on shape memory properties of graphene oxide‐carbon/glass fiber composites prepared based on vacuum infiltration hot‐press forming experimental system

“…Because of the ideal infiltration morphology of C6, the matrix is well infiltrated inside the CF, and the large gaps between the fiber bundles and the small gaps between individual fiber filaments within the fiber bundles are fully filled to form a whole. It makes its shape in the process of shape recovery for the fibers of the expansion force inhibition effect is strong 23 . In the uniform transfer of the recovery force in the process of its recovery, and the upward trend of the recovery force is relatively slow.…”

“…It makes its shape in the process of shape recovery for the fibers of the expansion force inhibition effect is strong. 23 In the uniform transfer of the recovery force in the process of its recovery, and the upward trend of the recovery force is relatively slow. When the mixing mode of the specimen is changed to C5G1, due to the addition of a layer of GF, the elasticity modulus of the specimen is reduced by about 10.24% compared with that of C6, the bending force exerted during bending is lower than that of C6, and the energy stored during cooling is low, and the energy released after heating is low.…”