本文采用电泳法在泡沫镍表面沉积一层石墨烯,接着浸渍一层聚甲基丙烯酸甲酯,最后去除泡沫镍模板获得石墨烯/聚甲基丙烯酸甲酯泡沫复合材料.采用扫描电镜、四探针电导率仪及矢量网络分析仪等对材料的形貌结构及性能进行表征.结果表明该泡沫复合材料完整地继承了泡沫镍的三维骨架结构,石墨烯在聚合物骨架中相互连接形成全连通的导电网络,使得该复合材料具有良好的电导率及电磁屏蔽性能.孔径0.25mm、厚度1.5mm的该复合材料的电导率最大可达1.5S·m-1,在8～12GHz范围内,其电磁屏蔽效能最高可达12.7dB,其中吸收损耗占总损耗的99％.因此以吸收损耗为主要屏蔽机制的石墨烯/聚甲基丙烯酸甲酯泡沫复合材料是一种有前途的轻质、透气型电磁屏蔽材料.
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