In this study, spray-assisted layer by layer chemical deposition was used for the preparation of a thin Cu layer with micro-nano structures on carbon fiber fabrics (CFFs). By adjusting the spraying passes, flocculent layered coarse structures composed of Cu nanoparticles have uniformly been constructed successfully. These copper-coated carbon fiber fabrics (Cu@CFFs) showed excellent electromagnetic interference (EMI) shielding effectiveness (SE), and the total SE of Cu@CFFs-100 was about 20 dB higher than the original carbon fiber fabrics. In addition to the reflection and adsorption effectiveness results, the high SE mainly depends on the outstanding conductivity of the carbon fiber fabric endowed by the deposited nanosized copper and enhanced the reflection loss of the incident electromagnetic wave and the multiple reflections of the internal network structure. Moreover, the stability and multilayer overlay of Cu@CFFs results show the possibility of applying spray-assisted layer by layer chemical deposition to produce EMI shielding materials.

在这项研究中，采用喷涂辅助化学沉积技术在碳纤维织物（CFF）上制备具有微纳结构的薄Cu层。通过调节喷射次数，成功地均匀构造了由铜纳米颗粒组成的絮状层状粗结构。这些镀铜碳纤维织物（Cu @ CFFs）表现出出色的电磁干扰（EMI）屏蔽效能（SE），Cu @ CFFs-100的总SE比原始碳纤维织物高约20 dB。除了反射和吸附效果，高SE主要取决于沉积的纳米级铜赋予碳纤维织物优异的导电性，并提高了入射电磁波的反射损耗和内部网络结构的多次反射。此外，Cu @ CFFs结果的稳定性和多层覆盖表明，有可能采用逐层化学沉积的方式喷涂辅助喷涂以生产EMI屏蔽材料。