文献类型：期刊文献

英文题名：A PVDF/MWCNTs/GO@MWCNTs/AgNWs bilayer structured composite film with ultra-high EMI shielding and conductivity performance

作者：Yang, Renyuan Tan, Yanyan Zhou, Teng Xu, Yuhuan Qin, Shuhao Zhang, Daohai Liu, Shan

第一作者：Yang, Renyuan

通信作者：Qin, SH[1];Zhang, DH[1];Qin, SH[2];Zhang, DH[2];Liu, S[2];Liu, S[3]

机构：[1]Guizhou Minzu Univ, Sch Chem Engn, Guiyang 550025, Guiyang, Peoples R China;[2]Natl Engn Res Ctr Compounding & Modificat Polymer, Guiyang 550014, Guizhou, Peoples R China;[3]Guizhou Inst Technol, Coll Mat & Energy Engn, Guiyang 550003, Guiyang, Peoples R China

第一机构：Guizhou Minzu Univ, Sch Chem Engn, Guiyang 550025, Guiyang, Peoples R China

通信机构：corresponding author), Guizhou Minzu Univ, Sch Chem Engn, Guiyang 550025, Guiyang, Peoples R China;corresponding author), Natl Engn Res Ctr Compounding & Modificat Polymer, Guiyang 550014, Guizhou, Peoples R China;corresponding author), Guizhou Inst Technol, Coll Mat & Energy Engn, Guiyang 550003, Guiyang, Peoples R China.|贵州理工学院;

年份：2024

外文期刊名：POLYMER COMPOSITES

收录：;EI(收录号：20242016102038);Scopus(收录号：2-s2.0-85193059102);WOS:【SCI-EXPANDED(收录号:WOS:001221668900001)】；

基金：The work was supported by National Natural Science Foundation of China Project (52163001); Guizhou Minzu University Research Platform Grant (GZMUGCZX [2021]01); Guizhou Provincial Science and Technology Program Project Grant (Qiankehe Platform Talents-CXTD [2021]005, Qiankehe Platform Talents-GCC [2022]010-1, Qiankehe Fuqi [2023]001); Guiyang Expert Workstation (ZJGZZ2021-07); Central Guided Local Science and Technology Development Funds Project (Qiankehe Zhong Yindi [2023]035). Green Chemistry, Resources and Environment Innovation Team of Guizhou University (No. 13, Guizhou Teaching Technology [2022]). Qiandongnan Branch and Joint Support (2023)09.

语种：英文

外文关键词：3D conductive network; adsorption; AgNWs; bilayer film; EMI shielding

摘要：Electromagnetic interference (EMI) shielding materials with easy processing, high electrical conductivity, and excellent absorption loss are urgently needed in aerospace, military stealth and portable electronic devices. In this study, a polyvinylidene fluoride/multi-walled carbon nanotubes (PVDF/MWCNTs)-3 wt% composite film prepared by simple solution mixing and polyethylene terephthalate (PET) nonwoven scraping method was used as the substrate, and the PVDF/MWCNTs/graphene oxide@multi-walled carbon nanotubes (PVDF/MWCNTs/GO@MWCNTs) and PVDF/MWCNTs/GO@MWCNTs/silver nanowires (PVDF/MWCNTs/GO@MWCNTs/AgNWs) bilayer composite films were prepared by vacuum-assisted filtration (VAF). When the amount of GO@MWCNTs was 20 mL, the conductivity of PVDF/MWCNTs/GO@MWCNTs film is 3.5 x 101 S m(-1), the total EMI shielding effectiveness (EMI SET) was 15.5 dB and the EMI absorption efficiency (EMI SEA) was 10.7 dB, the specific EMI SE (SSE/T) was 539.5 dB/ dB/(cm(-2) g). When the amount of AgNWs was 25 mL, the conductivity of PVDF/MWCNTs/GO@MWCNTs/AgNWs film with 0.47 mm thickness was 1.6 x 10(4) S m(-1), the EMI SET was 69.1 dB, the EMI SEA was 61.1 dB, and the SSE/T was 2320.0 dB cm(2) g(-1). The results show that the absorption was played a dominant role in the EMI shielding mechanism of obtained films. The addition of GO@MWCNTs/AgNWs increases the electrical conductivity and EMI shielding performance of the film more than the addition of GO@MWCNTs. This is mainly because GO, MWCNTs and AgNWs formed a novel three-dimensional conductive network structure inside the composite film due to their hydrogen bonding and van der Waals forces, which increases the carrier channels and promotes the interaction between the internal microcurrents and the electromagnetic waves, achieving the purpose of attenuating the electromagnetic waves. The obtained PVDF/MWCNTs/GO@MWCNTs/AgNWs film has good potential in EMI shielding in aerospace, military and electronic intelligence applications.