Sol Lee1,Minje Kim1,Chang geun kim1,Viet Anh Cao1,Junghyo Nah1
Chungnam National University1
Sol Lee1,Minje Kim1,Chang geun kim1,Viet Anh Cao1,Junghyo Nah1
Chungnam National University1
Electromagnetic waves emitted from different wireless devices may adversely affect electronic devices and cause communication faults. To cope with EM pollution, development of high-performance electromagnetic interference shielding materials with lightweight and flexibility is urgently needed. In this study, we developed ZnO nanorod decorated PVDF-MXene composite nanofiber for EMI shielding. To achieve maximum flexibility, polymer nanofiber is used as matrix polymer, and MXene nanoflakes exhibiting excelling EMI SE was incorporated inside the PVDF nanofiber,, forming the composite nanofiber. Additionally, surfactant-coated ZnO nanoparticles (NPs) were mixed in PVDF-MXene composite solution, which was then electrospun to form ZnO NP loaded PVDF-MXene composite nanofiber. During subsequent hydrothermal growth process, ZnO NPs inside the nanofiber are transported toward the surface of the nanofiber, so ZnO NRs start to grow on the outer surface of the nanofiber. Therefore, EMI shielding material developed in this work provides excellent flexibility, superior absorption SE, and increased multiple reflection and scatterings, resulting in high EMI SE (61 dB) and absolute EMI SE (21830 dB.cm<sup>2</sup>/g). In addition, the oxidation of MXene nanoflakes can be effectively prevented by the encapsulating PVDF nanofiber, maintaining high EMI SE for a long period time. Therefore, the ZnO-decorated PVDF-MXene composite nanofiber introduced in this work has demonstrated high EMI SE, excellent flexibility, and long-term stability.