Abstract Ethylenediamine functionalized Fe3O4 (NH2-Fe3O4) nanoparticles and graphene oxide (GO) were compounded firstly, followed by the addition of l -ascorbic acid, to obtain the Fe3O4/thermally annealed graphene aerogel (Fe3O4/TAGA) by thermal annealing method. And the Fe3O4/TAGA/epoxy nanocomposites were then fabricated via template-casting method. When the mass ratio of GO to NH2-Fe3O4 was 2:1 and the total mass fraction of Fe3O4/TAGA was 2.7 wt% (1.5/1.2 wt% Fe3O4/TAGA), the obtained Fe3O4/TAGA/epoxy nanocomposites presented the highest electromagnetic interference shielding effectiveness (EMI SE of 35 dB in the X-band), much higher than that of epoxy nanocomposites (10 dB) filled with the same Fe3O4/thermal annealing graphene oxide (Fe3O4/TAGO) loading. Meantime, the corresponding Fe3O4/TAGA/epoxy nanocomposites also presented the outstanding electrical conductivity of 27.5 S/m.

中文翻译：

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Fe3O4/热退火石墨烯气凝胶/环氧树脂电磁干扰屏蔽纳米复合材料的制备与研究

摘要 先将乙二胺功能化的 Fe3O4 (NH2-Fe3O4) 纳米粒子与氧化石墨烯 (GO) 复合，然后加入 l-抗坏血酸，通过热退火法得到 Fe3O4/热退火石墨烯气凝胶 (Fe3O4/TAGA)。然后通过模板浇铸方法制备 Fe3O4/TAGA/环氧树脂纳米复合材料。当GO与NH2-Fe3O4的质量比为2:1且Fe3O4/TAGA的总质量分数为2.7 wt%（1.5/1.2 wt% Fe3O4/TAGA）时，所得Fe3O4/TAGA/环氧纳米复合材料的电磁场最高干扰屏蔽效率（X 波段 EMI SE 为 35 dB），远高于填充相同 Fe3O4/热退火氧化石墨烯 (Fe3O4/TAGO) 负载的环氧树脂纳米复合材料 (10 dB)。与此同时，