Preparation and electromagnetic interference properties of GO modified C/C composites
In order to obtain a simple and low-cost electromagnetic shielding material,the 2D carbon fiber(CF)precast was loaded with graphene oxide(GO)by spraying method,and the boron-phenolic resin(BPF)was used as the precursor,and the graphene supported carbon fiber(GO/CF)was used as the precast.GO modified carbon/carbon composites(GO/C/C)were prepared by hot press molding method and carbonization process.X-ray Diffraction(XRD),scanning electron microscope(SEM),Raman spectrum,densitometer and vector network analyzer were used to characterize the composites.The results show that the surface morphology of GO/CF preform is the best when the load of GO is 0.1％and 0.3％.When GO content is 0.3％,the composites have the highest porosity and the lowest resistivity.When the load of GO is 0.1％,the total electromagnetic shielding effi-ciency of the composite in the X-band is the highest,reaching 43.84 dB,which is 28.3％higher than that of the blank sample,and has met the basic commercial requirements.
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