Preparation and performance study of Eucommia ulmoides gum/MXene isolation network composite films
In recent years,the issue of electromagnetic shielding has become increasingly severe,and the search for high-performance electromagnetic shielding materials is a pressing practical need.In this study,crystalline bio-based Eucommia ulmoides gum(EUG)was chosen as the matrix,which possesses a unique layered structure,abundant surface functional groups,and excellent conductivity,while MXene was utilized as the nano-filler.Composite films of Eucommia ulmoides gum(EUG)/MXene with an isolation network structure were prepared via latex blending.The effects of MXene dosage and composite film thickness on the microstructure,crystallinity,conductivity and electromagnetic shielding performance of the Eucommia ulmoides gum(EUG)/MXene composite films were investigated.The results demonstrate that the Eucommia ulmoides gum(EUG)/MXene composite films prepared by latex blending exhibit enhanced electromagnetic wave reflection and polarization relaxation phenomena due to the enriched EUG-MXene interfacial structure and active functional groups on the MXene surface,with increasing MXene content and composite film thickness.At an MXene content of 8.9% and a thickness of 400 µm,the electromagnetic shielding effectiveness of the composite film reached a peak of 47.9 dB,laying the groundwork for further research on Eucommia ulmoides gum-based electromagnetic shielding composite materials.
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