以膨胀石墨(EG)和金属网(MN)作为电磁屏蔽基元材料与ABS树脂采用共混、挤出、热压等成型工艺制备了电磁屏蔽复合材料,研究了膨胀石墨的含量、处理方式、复合材料的厚度和金属网的目数对电磁屏蔽复合材料屏蔽性能的影响.结果表明,在膨胀石墨/ABS电磁屏蔽复合材料中,其电磁屏蔽效能随着膨胀石墨含量增加及复合材料厚度增加而增大,膨胀石墨经超声处理后,可以提高复合材料的屏蔽效能.在两种单层金属网/ABS电磁屏蔽夹层复合材料中,屏蔽效能并不随着金属网目数增加而增大.在30MHz～1.8GHz频率范围内,200目不锈钢网/ABS复合材料和100目铜网/ABS复合材料的屏蔽性能最好,最大屏蔽效能分别为76.1和70dB.在多相电磁屏蔽复合材料中,膨胀石墨/不锈钢网/ABS复合材料的屏蔽效能比不锈钢网/ABS复合材料高约5dB.
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