Abstract With the explosive development of wearable and foldable electronics, it is imperative to create novel flexible composite materials with excellent durability, reliability, and high electromagnetic interference shielding capabilities. However, the preparation of flexible polyaniline (PANI) based shielding composites with excellent mechanical deformation durability is still a huge challenge due to the inherent rigidity of PANI chains. Herein, porous and flexible artificial suede-like cloth (ASC) fabrics were chosen as the substrate. A facile approach was proposed to synthesize ASC/PANI composite fabrics. The mulberry-like polyaniline clusters coated ASC fabrics were successfully prepared by a facile in-situ polymerization technique. Therefore, a three-dimensional sandwich-like PANI conductive network was established. Extensive research has been carried out on structure, morphology, dielectrics and electromagnetic characteristics. The results indicate that the high dielectric loss mainly originates from the electrical conductivity. The fabricated ASC/PANI fabric exhibits an effective EMI shielding capability of 25.90 dB. The unique heterostructures and the skin depth effect were responsible for the enhanced shielding performance. Experimental and theoretical analysis demonstrated the absorption dominated shielding mechanism. Interestingly, more than 93.5% of SE can be retained after 1500 cycles of bending test with a bending radius of only 2.6 mm. Therefore, these ASC/PANI fabrics with effective shielding properties and robust durability can be delivered. Our results promise an efficient and powerful strategy to achieve flexible PANI-based composite for shielding application potentials.

中文翻译：

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具有有效电磁屏蔽能力的桑椹状聚苯胺基柔性复合织物

摘要 随着可穿戴和可折叠电子产品的爆炸式发展，开发具有优异耐用性、可靠性和高电磁干扰屏蔽能力的新型柔性复合材料势在必行。然而，由于PANI链固有的刚性，制备具有优异机械变形耐久性的柔性聚苯胺（PANI）基屏蔽复合材料仍然是一个巨大的挑战。在此，选择多孔且柔韧的人造仿麂皮布 (ASC) 织物作为基材。提出了一种合成 ASC/PANI 复合织物的简便方法。通过简单的原位聚合技术成功地制备了桑椹状聚苯胺簇涂覆的 ASC 织物。因此，建立了一个三维三明治状的PANI导电网络。已经对结构、形态、电介质和电磁特性进行了广泛的研究。结果表明，高介电损耗主要源于电导率。制造的 ASC/PANI 织物表现出 25.90 dB 的有效 EMI 屏蔽能力。独特的异质结构和趋肤深度效应是增强屏蔽性能的原因。实验和理论分析证明了吸收为主的屏蔽机制。有趣的是，在弯曲半径仅为 2.6 mm 的弯曲试验 1500 次循环后，可以保留超过 93.5% 的 SE。因此，可以提供这些具有有效屏蔽性能和坚固耐用性的 ASC/PANI 织物。