Abstract Carbon nanomaterials such as carbon nanotubes (CNTs), graphene and their hybrid have been studied extensively. Despite having excellent properties of CNTs and graphene have not yet been fully realized in the polymer composites. During fabrication agglomeration of CNTs and restacking of graphene is a serious concern that results in the degradation of properties of nanomaterials into the final composites. To improve the dispersion of CNTs and restacking graphene, in the present research work, we focused on the hybridization of graphene oxide and CNTs. Multiwalled carbon nanotubes (MWCNTs), functionalized carbon nanotubes (FCNTs), and graphene oxide-carbon nanotubes (GCNTs) reinforced acrylonitrile butadiene styrene (ABS) composites were prepared separately by vacuum filtration followed by hot compression molding. Further, dynamic mechanical analysis (DMA), and electromagnetic interference (EMI) shielding properties of ABS composites reinforced carbon nanofillers were investigated. The dynamic mechanical properties of polymers strongly depend on the adhesion of fillers and polymer, entanglement density of polymer chains in the presence of carbon fillers. The dynamic mechanical characteristics such as storage, loss modulus, and damping factor of prepared composites were significantly affected by the incorporation of MWCNTs, FCNTs, and GCNTs. Maximum EMI shielding effectiveness of −49.6 dB was achieved for GCNT-ABS composites which were highest compared to MWCNTs-ABS composites (−38.6 dB) and FCNTs-ABS composites (−36.7 dB) in the Ku band (12.4–18 GHz). These results depict the great potential of GCNTs-ABS composites to be used in various applications of efficient heat dissipative EMI shielding materials for electronic devices.

中文翻译：

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氧化石墨烯-碳纳米管-丙烯腈丁二烯苯乙烯混合复合材料的电磁干扰屏蔽和动态力学分析

摘要 碳纳米材料，如碳纳米管（CNTs）、石墨烯及其杂化物已被广泛研究。尽管碳纳米管和石墨烯具有优异的性能，但在聚合物复合材料中尚未完全实现。在制造过程中，碳纳米管的团聚和石墨烯的重新堆叠是一个严重的问题，导致纳米材料的性能退化为最终的复合材料。为了提高碳纳米管的分散性和重新堆叠石墨烯，在目前的研究工作中，我们专注于氧化石墨烯和碳纳米管的杂化。通过真空过滤和热压成型分别制备了多壁碳纳米管 (MWCNT)、功能化碳纳米管 (FCNT) 和氧化石墨烯-碳纳米管 (GCNT) 增强的丙烯腈丁二烯苯乙烯 (ABS) 复合材料。更多，研究了 ABS 复合材料增强碳纳米填料的动态力学分析 (DMA) 和电磁干扰 (EMI) 屏蔽性能。聚合物的动态机械性能在很大程度上取决于填料与聚合物的粘附性、聚合物链在碳填料存在下的缠结密度。MWCNTs、FCNTs和GCNTs的掺入显着影响了所制备复合材料的动态力学特性，如储能、损耗模量和阻尼系数。与 MWCNTs-ABS 复合材料 (-38.6 dB) 和 FCNTs-ABS 复合材料 (-36.7 dB) 在 Ku 频段 (12.4–18 GHz) 相比，GCNT-ABS 复合材料实现了 -49.6 dB 的最大 EMI 屏蔽效率。