Here, we report a unique hybrid sandwich‐type composite structure consisting of waste cigarette wrapper (CW) inserted in polydimethylsiloxane (PDMS) and reduced graphene oxide (RGO) composite matrix that displays a high EMI shielding effectiveness (SE) of ~50.79 dB in the extended Ku‐band. The function of the inserted CW is to facilitate the multiple reflections and heat dissipation as it contains an Al coating. The interior of CW in the composite as well as the three‐dimensional conductive networks of RGO throughout the PDMS matrix facilitates the microwave absorption through conductive dissipation and heat dissipation. Thus, an absorption‐multiple reflection‐absorption pathway is followed due to the combination of three sandwiched layers, that is, PDMS‐RGO, CW, and PDMS‐RGO. The sandwich architecture of the hybrid PDMS nanocomposite containing both CW and RGO displays a superior EMI SE over the nanocomposite that only contains RGO as filler in PDMS matrix. Moreover, the fabricated composite displays a high thermal conductivity which helps to dissipate the radiated microwave energy via a Joule heating effect. Thus, the fabricated lightweight and flexible hybrid composite structure could be an efficient microwave absorber which offers an attractive and cost‐effective alternative approach to metal based conventional EMI shielding materials.

中文翻译：

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纳米结构香烟包装纸包裹的PDMS-RGO夹心复合​​材料，用于高性能EMI屏蔽应用

在这里，我们报告了一种独特的混合夹心型复合结构，该结构由插入聚二甲基硅氧烷（PDMS）中的废香烟包装纸（CW）和还原型氧化石墨烯（RGO）复合基质组成，该复合基质在2020年显示出约50.79 dB的高EMI屏蔽效果（SE）。扩展的Ku频段。插入的CW的功能是促进多次反射和散热，因为它包含Al涂层。复合材料中的CW内部以及整个PDMS矩阵中RGO的三维传导网络，通过传导耗散和散热促进了微波的吸收。因此，由于三层夹心层的组合，即PDMS-RGO，CW和PDMS-RGO，遵循了吸收-多次反射-吸收途径。包含CW和RGO的杂化PDMS纳米复合材料的三明治结构显示出比仅包含RGO作为填充剂的纳米复合材料更好的EMI SE。此外，所制造的复合材料显示出高导热率，这有助于通过焦耳热效应消散辐射的微波能量。因此，所制造的轻巧而灵活的混合复合结构可以成为一种高效的微波吸收器，它为基于金属的常规EMI屏蔽材料提供了一种有吸引力且具有成本效益的替代方法。