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Efficient electromagnetic interference shielding of lightweight carbon nanotube/polyethylene composites via compression molding plus salt-leaching

机译：通过压缩成型加盐浸出轻质碳纳米管/聚乙烯复合材料的高效电磁干扰屏蔽

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摘要

Carbon nanotube/high density polyethylene (CNT/HDPE) foam composites with high electrical conductivity and electromagnetic interference (EMI) shielding performance were developed by means of compression molding plus salt-leaching. The uniform porous structure and interconnected CNT networks throughout the cell backbones endowed the as-prepared foam composites with a significantly lower electrical percolation threshold (0.22 vol%) than that of the solid composites (0.84 vol%). Owing to the multiple reflections and scattering between the cell-matrix interfaces, the foam composites presented a superior specific EMI shielding effectiveness (EMI SE) of 104.3 dB cm(3) g(-1), 2.2 times higher than that of their solid counterpart. Besides this, the pore sizes of the CNT/HDPE foam composites could be easily tuned by controlling the particle size of the porogen. Also, the electrical conductivity and specific EMI SE increased with an increase in the cell diameter, which was attributed to the formation of a more perfect conductive network in the cell backbones. Our approach provides a novel idea for fabricating new lightweight EMI shielding materials, especially for aircraft and spacecraft applications.
机译：通过压缩成型加盐浸出，开发了具有高导电性和电磁干扰（EMI）屏蔽性能的碳纳米管/高密度聚乙烯（CNT / HDPE）泡沫复合材料。在整个细胞骨架中均匀的多孔结构和互连的CNT网络赋予由固体复合材料（0.84体积％）的电渗透阈值（0.22体积％）的制备的泡沫复合材料。由于细胞矩阵界面之间的多重反射和散射，泡沫复合材料呈现出104.3db（3）g（3）g（-1）的优异特定EMI屏蔽效果（EMI SE），比其固体对应物高2.2倍。除此之外，通过控制孔子的粒度可以容易地调整CNT / HDPE泡沫复合材料的孔径。而且，电导率和特定的EMI Se随着细胞直径的增加而增加，其归因于在细胞骨架中形成更完美的导电网络。我们的方法为制造新的轻质EMI屏蔽材料，特别是为飞机和航天器应用提供了一种新颖的想法。

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  • 来源
    《RSC Advances》 |2018年第16期|共7页
  • 作者

    Xu Ling; Jia Li-Chuan; Yan Ding-Xiang; Ren Peng-Gang; Xu Jia-Zhuang; Li Zhong-Ming;

  • 作者单位

    Sichuan Univ State Key Lab Polymer Mat Engn Coll Polymer Sci &

    Engn Chengdu 610065 Sichuan Peoples R China;

    Sichuan Univ State Key Lab Polymer Mat Engn Coll Polymer Sci &

    Engn Chengdu 610065 Sichuan Peoples R China;

    Sichuan Univ Sch Aeronaut &

    Astronaut Chengdu 610065 Sichuan Peoples R China;

    Xian Univ Technol Inst Printing Packaging Engn &

    Digital Media Tech Xian 710048 Shaanxi Peoples R China;

    Sichuan Univ State Key Lab Polymer Mat Engn Coll Polymer Sci &

    Engn Chengdu 610065 Sichuan Peoples R China;

    Sichuan Univ State Key Lab Polymer Mat Engn Coll Polymer Sci &

    Engn Chengdu 610065 Sichuan Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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