Preparation And Properties Investigation Of Carbon/Glass Hybrid Fiber Composites With Graphene Oxide Modification

Glass fiber reinforced composite materials are widely used in large-scale fan blade shell structures due to the advantages of high physical and mechanical properties,high temperature resistance and low manufacturing cost.However,low modulus and low strength have limited them from being used further.Carbon fiber reinforced composite materials that have higher specific strength,specific modulus and low density are also limitedly used in fan blades due to the high cost.Therefore,both the development and application of the carbon/glass hybrid fiber reinforced composite materials can offer a complementarity with these two material types,which have had the improvement of strength,rigidity and flexibility as well as the advantages of light weight and low cost.Meanwhile,due to the low strength of interface bond between fiber and resin],the performance of the bond between layers and interfaces of the carbon/glass hybrid fiber composite material becomes low.When loaded in an out-of-plane direction,the fiber/matrix can easily debond and separate,resulting in cracks in the material,which is not helpful for the distribution of load and also reduces the physical and mechanical properties of the material.In order to further improve the interfacial properties of carbon/glass hybrid fiber composites,it is necessary to study the fiber/matrix interface modification mechanism and largely improve the mechanical properties of the material.This study uses biaxial carbon/glass hybrid fiber cloth as the reinforcement,Graphene oxide modified epoxy resin as the matrix,and prepares specimens using the vacuum-assisted resin transfer molding process.Firstly,this study tested the tensile and flexural properties of the graphene-modified composite material specimens,and characterizes the interface modification mechanism of GO nanoparticles of the composite material using methods such as SEM,FT-IR and TGA.Then it analyzes the way of how GO filling content influences the bonding force of composite fiber/matrix interface.The optimal GO mass fraction and optimized process for interface modification were achieved based on the measured mechanical properties of the modified composite material.Secondly,based on the electrical and thermal conductivity of the modified specimens,this study tested two properties.One is the static thermal conductivity of the carbon/glass hybrid fiber composite material,whose property has been changed with different GO mass fractions.The other is the resistance change of the optimal GO filling carbon/glass hybrid fiber reinforced composites under the conditions of different loads and temperatures.The way of how GO filling amount can influence the thermal conductivity of the composite material,as well as the relationship between the resistance,temperature and deformation of the modified composite,are analyzed.Finally,based on the best GO mass fraction,a rectangular beam component that is used for the load of the fan blade was prepared.The bending performance of the specimen was tested,and the relationship between rectangular beams of different sizes and the largest bearing capacity is analyzed.The results of this study can provide the process of nano-modification of epoxy resin with some reference.This study can serve as a methodology and scientific basis for exploring the mechanism of composite material interface modification.The results may bring light to improving the electrical and thermal conductivity of carbon/glass hybrid fiber reinforced composites.And also this study will offer a theoretical basis and technical support for developing fan blade used composite materials that have higher mechanical properties and strong functionality at the same time.