Jang Daeik, Park Jihoon, Jang Woosuk, Bang Jinho, Kim G M, Choi Jaesuk, Seo Joonho, Yang Beomjoo
Center for Advanced Construction Materials, Department of Civil Engineering, The University of Texas at Arlington, Arlington, TX 76019, USA.
Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea.
Materials (Basel). 2024 Oct 8;17(19):4913. doi: 10.3390/ma17194913.
The growing importance of electromagnetic interference (EMI) shielding composites in civil engineering has garnered increasing attention. Conductive cement-based composites, incorporating various conductive fillers, such as carbon nanotubes (CNTs), carbon fibers (CFs), and graphene nanoplatelets (GNPs), provide effective solutions due to their high electrical conductivity. While previous studies have primarily focused on improving the overall shielding effectiveness, this research emphasizes balancing the reflection and absorption properties. The experimental results demonstrate an EMI shielding performance exceeding 50 dB, revealing that filler size (nano, micro, or macro) and shape (platelet or fiber) significantly influence both reflection and absorption characteristics. Based on a comprehensive evaluation of the shielding properties, this study highlights the need to consider factors such as reflection versus absorption losses and filler shape or type when optimizing filler content to develop effective cement-based EMI shielding composites.
电磁干扰（EMI）屏蔽复合材料在土木工程中的重要性日益凸显，已引起越来越多的关注。掺入各种导电填料（如碳纳米管（CNTs）、碳纤维（CFs）和石墨烯纳米片（GNPs））的导电水泥基复合材料，因其高导电性而提供了有效的解决方案。虽然以往的研究主要集中在提高整体屏蔽效能上，但本研究强调平衡反射和吸收特性。实验结果表明，EMI屏蔽性能超过50dB，表明填料尺寸（纳米、微米或宏观）和形状（片状或纤维状）对反射和吸收特性均有显著影响。基于对屏蔽性能的综合评估，本研究强调在优化填料含量以开发有效的水泥基EMI屏蔽复合材料时，需要考虑反射与吸收损耗以及填料形状或类型等因素。
