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填充金属纤维的复合材料由于具有优异的电磁屏蔽效能(EMSE)而广泛应用于电磁干扰领域。本研究采用浸渗和机械搅拌法分别制备了316L纤维/环氧树脂和Cu纤维/环氧树脂2种复合材料,并测试了其电磁屏蔽效能。研究表明,当316L纤维长径比从200增加到1000时,316L纤维/环氧树脂复合材料的电磁屏蔽效能逐渐增大,而当长径比从1000增加到3000时,其复合材料的电磁屏蔽效能迅速下降;当316L纤维的质量分数从10%增加到25%时,复合材料的电磁屏蔽效能逐渐增大。对于316L纤维/环氧树脂复合材料而言,316L纤维的最佳参数:纤维直径为8μm、含量为25%、长径比为1000,其复合材料的电磁屏蔽效能最高可达–78 d B。对于Cu纤维/环氧树脂复合材料而言,Cu纤维的最佳参数:纤维直径为120μm、含量为2.0%。
Metal-fiber filled composites are widely used in the field of electromagnetic interference because of their excellent electromagnetic shielding effectiveness (EMSE). In this study, two kinds of composite materials of 316L fiber / epoxy resin and Cu fiber / epoxy resin were prepared by impregnation and mechanical agitation, and the electromagnetic shielding effectiveness was tested. The results show that when the aspect ratio of 316L fiber increases from 200 to 1000, the electromagnetic shielding effectiveness of 316L fiber / epoxy composites gradually increases. When the aspect ratio increases from 1000 to 3000, the electromagnetic shielding The efficiency decreases rapidly. When the mass fraction of 316L fiber increases from 10% to 25%, the electromagnetic shielding effectiveness of the composite increases. For the 316L fiber / epoxy composites, the best parameters of 316L fiber: the fiber diameter of 8μm, content of 25%, the aspect ratio of 1000, the electromagnetic shielding effectiveness of the composite up to -78 d B. For Cu fiber / epoxy composite material, the best parameters of Cu fiber: fiber diameter of 120μm, the content of 2.0%.