期刊
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
卷 123, 期 -, 页码 293-300出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2019.05.030
关键词
MXene/C hybrid foam; Epoxy EMI shielding nanocomposites; Electrical conductivity; Three-dimensional conductive network
资金
- Space Supporting Fund from China Aerospace Science and Industry Corporation [2019-HT-XG, 2018-HT-XG]
- Foundation of Aeronautics Science Fund [2017ZF53071]
- Natural Science Basic Research Plan for Distinguished Young Scholars in Shaanxi Province of China [2019-JC-11]
- Natural Science Basic Research Plan in Shaanxi Province of China [2018JM5001]
- Northwestern Polytechnical University [XQ201913]
Few-layered Ti3C2Tx MXene was prepared by ionic intercalation and sonication-assisted method. Porous three-dimensional (3D) Ti3C2Tx MXene/C hybrid foam (MCF) was fabricated by sol-gel followed by thermal reduction. The MCF/epoxy EMI shielding nanocomposites were obtained via vacuum-assisted impregnation followed by curing process. When the mass fraction of MCF was 4,25 wt% (MCF-5), the MCF-5/epoxy EMI shielding nano composites exhibited the optimal electrical conductivity of 184 S/m and the maximum EMI SE of 46 dB, 3.1 x 10(4) and 4.8 times higher than that of MCF-0/epoxy nanocomposites (without Ti3C2T MXene), respectively. Furthermore, the corresponding Young's modulus of 3.96 GPa and hardness of 0.31 GPa was increased by 13% and 11%, respectively. Conductive networks can realize the attenuation and dissipation of electromagnetic waves by multiple reflection & reabsorption, and absorption is main shielding mechanism. Unique 3D conductive networks of MCF would expand wider application of the Ti3C2T MXene/polymer-based nanocomposites in high-tech EMI shielding fields.
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