三维空心MXene-rGO-CNT复合材料的制备及其电磁屏蔽性能  

Preparation and EMI shielding properties of three-dimensional hollow MXene-rGO-CNT composites

作　　者：李杨 李斌[1] 李仲明 赵一霖 孔硕硕 韩佳宏 LI Yang;LI Bin;LI Zhongming;ZHAO Yilin;KONG Shuoshuo;HAN Jiahong(College of Chemical Engineering,Kunming University of Science and Technology,Kunming 650504,China)

机构地区：[1]昆明理工大学化学工程学院,昆明650504

出　　处：《复合材料学报》2025年第2期937-948,共12页Acta Materiae Compositae Sinica

摘　　要：随着科学技术的不断发展,“强吸收、宽频、轻质”的电磁屏蔽材料亟需被开发。本文选用聚甲基丙烯酸甲酯(PMMA)微球和冰模板,通过牺牲模板法制备了三维空心MXene-还原氧化石墨烯-碳纳米管(MXene-rGO-CNT)复合材料,并对复合材料的形貌结构和电磁屏蔽性能进行了表征。结果表明:丰富微孔结构的构造改善了MXene薄片团聚现象,并减轻了复合材料的密度(低于0.26 g/cm^(3))。同时,互连多孔结构可以引起电磁波在材料内部的多次反射和散射,增强其电磁屏蔽性能。MXene-rGO-CNT复合材料在1~18 GHz的测量宽频率范围内表现出良好的电磁波屏蔽性能,峰值达到54 dB的高电磁屏蔽效能。这项工作为制备高效电磁屏蔽应用的纳米复合材料提供了一种便捷的方法。With the continuous development of science and technology,"strong absorption,broadband,lightweight"electromagnetic interference shielding materials need to be developed.In this paper,three-dimensional hollow MXene-reduced graphene oxide-carbon nanotube(MXene-rGO-CNT)composites were prepared by a sacrificial template method using polymethyl methacrylate(PMMA)microspheres and ice templates,and material morphology,structure and electromagnetic interference shielding properties of the composites were characterized.The results show that the construction of rich microporous structure reduces the agglomeration of MXene flakes and the density of the composites(below 0.26 g/cm^(3)).Meanwhile,the interconnected porous structure can cause multiple reflections and scattering of electromagnetic waves,enhancing the electromagnetic interference shielding performance of the composite material.The MXene-rGO-CNT composites exhibit good electromagnetic interference shielding performance over a wide frequency range measured from 1-18 GHz,with a high electromagnetic interference shielding effectiveness of 54 dB at peak value.This work provides a convenient method for preparing nanocomposites for efficient electromagnetic interference shielding applications.

关 键 词：MXene 电磁屏蔽 多孔结构 碳纳米材料 牺牲模板法 

分 类 号：TB34[一般工业技术—材料科学与工程] TB332