采用一种导电材料预制体-单壁碳纳米管(Single-wall carbon nanotube,SWCNT)无纺布与环氧树脂复合制备了电磁屏蔽复合材料,并对所制复合材料的电磁屏蔽性能进行了表征.结果表明:所制复合材料对电磁波的屏蔽效率随SWCNT无纺布厚度的增加而增加.在较低的SWCNT无纺布填加量下所制复合材料可以实现对低频电磁波较高的屏蔽效率.不同于填加粉体导电材料所制电磁屏蔽复合材料,作为导电材料预制体使用的SWCNT无纺布是一个独立的整体导电薄膜,可以直接引入到基体当中,不存在分散问题.并且通过简单的导电预制体多层叠加的方式即可实现复合材料更高的屏蔽效率.
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