金属纤维/聚合物复合材料的制备及其电磁屏蔽效能

Preparation and electromagnetic shielding effectiveness of metal fibers/polymer composite

摘要:

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/环氧树脂两种复合材料，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纤维的含量从10wt%增加到25wt%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纤维的最佳参数为：纤维直径为?8μm、含量为25wt%、长径比为1000，其复合材料的电磁屏蔽效能最高可达-78dB。对于Cu纤维/环氧树脂复合材料而言，Cu纤维的最佳参数为：纤维直径为?120μm、含量为2.0wt%。

Abstract:

Composite containing metal fibers would be applied widely in the field of electromagnetic interference for excellent electromagnetic shielding effectiveness (EMSE). In the study, two kinds of composite, the 316L fibers/epoxy resin composite and the Cu fibers/epoxy resin composite, were achieved using infiltration and mechanical stirring methods, respectively. The EMSE of composite was assessed. The results show that the EMSE of 316L fibers/epoxy resin composite increases gradually with the aspect ratio of fibers increasing from 200 to 1000, while it decreases quickly with that from 1000 to 3000. Furthermore, the EMSE of the composite increases gradually as the content of fibers increases from 10wt% to 25wt%. Additionally, for the 316L fibers/epoxy resin composite, the optimum parameters of 316L fibers are the diameter of ?8μm, the content of 25wt% and the aspect ratio of 1000, and the highest EMSE of the composite is about -78dB. For the Cu fibers/epoxy resin composite, the optimum parameters of Cu fibers are the diameter of ?120μm and the content of 2.0wt%.