Amino-functionalized reduced graphene oxide (RKGO) was obtained by modifying graphene oxide (GO) with silane coupling agent KH-550 and hydrazine hydrate(N2H4·H2O).RKGO was introduced into the epoxy acrylic resin (EPAA) system obtained by free radical polymerization to construct an amino-functionalized reduced graphene oxide/epoxy acrylic resin (RKGO/EPAA) electromagnetic shielding composite coating.Characterization tests were carried out by infrared and Raman spectroscopy,and the mechanical properties and electromagnetic shielding properties of the composite coatings were investigated.The results showed that the electromagnetic shielding composite coating had excellent overall mechanical properties,with a hardness of 1H and an adhesion grade of 0.When the addition amount of RKGO reached 20%,the volume resistivity of the coating was 10.2Ω·cm,and the electromagnetic shielding effectiveness reached 21.66dB,which exceeded the standard of 20dB of commercial demand.The coating exhibited excellent electromagnetic shielding effectiveness,showing promising application prospects in the field of electromagnetic shielding composite materials.
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基金资助
陕西省科技创新团队项目(2024RS-CXTD-46)
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