Abstract Rubber-based conductive polymer composites are deformable and flexible, which have been demonstrated tremendous applications in electromagnetic interference (EMI) shielding materials. Here, we filled different dimensional carbonaceous fillers, including zero-dimensional carbon black (0D CB), one-dimensional carbon nanotubes (1D CNTs), two-dimensional graphene (2D GP), and their combinations, into isoprene rubber (IR) to fabricate the flexible EMI shielding composites. Both the electrical, mechanical, and EMI shielding properties were investigated. It was found that the EMI shielding properties of IR-based composites mainly dominated by the microwave absorption consumption. Since 1D CNTs possess the highest EMI shielding effectiveness for absorption, IR/CNTs composites exhibit the best electromagnetic interference shielding properties compared to other carbonaceous nanoparticles filled composites. Moreover, partially replacing CNTs with CB particles to fabricate hybrid IR/CB/CNTs composite is an effective route to improve the electrical properties and lower the cost of the composites. However, it is found that hybrid IR/CB/CNTs composite has a lower EMI shielding effectiveness than IR/CNTs composites, indicating that EMI shielding properties depend on a lot more than just the electrical conductivity of the resulting composites. Nevertheless, based on comprehensive consideration of cost, electrical, mechanical and EMI shielding properties of the composites, it is still an effective way to design the high-performance EMI shielding materials via the combination of different dimensional fillers.

中文翻译：

---

填料维度对异戊二烯橡胶基柔性导电复合材料电气、机械和电磁屏蔽性能的影响

摘要 橡胶基导电聚合物复合材料具有可变形和柔韧的特性，在电磁干扰（EMI）屏蔽材料中有着广泛的应用。在这里，我们将不同维度的碳质填料填充到异戊二烯橡胶 (IR) 中，包括零维炭黑 (0D CB)、一维碳纳米管 (1D CNTs)、二维石墨烯 (2D GP) 及其组合。制造柔性 EMI 屏蔽复合材料。研究了电气、机械和 EMI 屏蔽特性。结果表明，IR 基复合材料的 EMI 屏蔽性能主要由微波吸收消耗决定。由于一维碳纳米管具有最高的电磁屏蔽吸收效果，与其他碳质纳米粒子填充复合材料相比，IR/CNTs 复合材料表现出最好的电磁干扰屏蔽性能。此外，用CB颗粒部分替代CNT来制造混合IR/CB/CNTs复合材料是提高电性能和降低复合材料成本的有效途径。然而，发现混合 IR/CB/CNTs 复合材料的 EMI 屏蔽效率低于 IR/CNTs 复合材料，表明 EMI 屏蔽性能不仅仅取决于所得复合材料的电导率。尽管如此，综合考虑复合材料的成本、电学、机械和EMI屏蔽性能，通过不同尺寸填料的组合来设计高性能EMI屏蔽材料仍然是一种有效的方法。