Graphene–polyamide‐6 composite (GC) filament with 9%·v/v graphene concentration was applied as feedstock in filament‐based material extrusion (ME) additive manufacturing. The materials are characterized by melt flow index (MFI), mechanical properties, dielectric properties, and electromagnetic interference shielding effectiveness (EMI SE) in the X‐band frequency range. Despite high graphene concentration, MFI is unaffected. In ME test specimens; GC has both superior elastic modulus and tensile strength at yield when compared with the neat polymer. Enhanced mechanical properties at high graphene concentration without diminished processability highlight the suitability of polyamide‐6 (PA6) as matrix material for graphene composite filaments. Scanning electron microscopy (SEM) imaging indicates graphene alignment in GC after printing. In both compression molded (CM) and ME test specimens, dielectric properties and EMI SE of PA6 are enhanced by graphene inclusion. Further analysis reveals that ME has a negative influence on absorption of electromagnetic waves, while reflection is virtually unaffected.

中文翻译：

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石墨烯-聚酰胺-6复合材料，用于增材制造多功能电磁干扰屏蔽组件

具有9％·v / v石墨烯浓度的石墨烯-聚酰胺-6复合（GC）长丝被用作长丝基材料挤出（ME）增材制造中的原料。这些材料的特征在于在X频段频率范围内的熔体流动指数（MFI），机械性能，介电性能和电磁干扰屏蔽效果（EMI SE）。尽管石墨烯浓度很高，但MFI并不受影响。在ME试样中；与纯聚合物相比，GC具有优异的弹性模量和屈服拉伸强度。在高石墨烯浓度下增强的机械性能而不会降低加工性能，这突显了聚酰胺-6（PA6）作为石墨烯复合长丝基质材料的适用性。扫描电子显微镜（SEM）成像表明打印后GC中的石墨烯排列。在压缩模制（CM）和ME测试样品中，石墨烯夹杂物都可以增强PA6的介电性能和EMI SE。进一步的分析表明，ME对电磁波的吸收有负面影响，而反射实际上不受影响。