【摘要】 通过溶剂热法与电泳法制备了以碳纳米管膜为基底的三维石墨烯/碳纳米管/四氧化三铁膜状复合材料,然后以环氧树脂为基体制备出多层电磁波屏蔽复合材料。分析了电场强度和沉积时间对氧化石墨烯层结构形貌、复合材料电导率和屏蔽效能的影响。研究结果表明:当复合材料为4层时,厚度仅为1.4mm,在X波段频率范围内的最高电磁屏蔽效能为49.7d B,比屏蔽效能高达35.5d B/mm,超过目前大多数碳基复合材料,抗拉强度为53.2MPa,是兼具高屏蔽性能和力学性能的石墨烯电磁波屏蔽材料。更多还原

【Abstract】 A thin 3 D reduced graphene oxide（r GO）/CNT/Fe₃O₄ composite based on carbon film with outstanding electromagnetic wave interference shielding capability was fabricated by solvothermal method and electrophoresis. Then, multi-layered composites were prepared based on epoxy resin. The influence of electric field and deposition time on the morphology of the graphene oxide nanosheet and conductivity and shielding efficiency of 3 D r GO/CNT/Fe₃O₄/epoxy composites was analyzed. 3 D r GO/CNT/Fe₃O₄/epoxy composite with 4-layer has a thickness of 1.4 mm, and its shielding effectiveness is up to 49.7 d B in the X-band frequency range. More significantly, its specific shielding effectiveness is as high as 35.5 d B/mm, which surpasses the value of most of the current carbon-based composites, and its tensile strength is 52 MPa. Therefore, the successful fabrication of this novel material signifies the potential of the use of graphene as a thin and highperformance EMI shielding material.更多还原