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In situ polymerization of graphene-polyaniline@polyimide composite films with high EMI shielding and electrical properties

机译:石墨烯 - 聚苯胺的原位聚合用高EMI屏蔽和电气性能的聚酰亚胺复合膜

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摘要

With the increasing demands of the electronics industry, electromagnetic interference (EMI) shielding has become a critical issue that severely restricts the application of devices. In this work, we have proposed a "non-covalent welding" method to fabricate graphene-polyaniline (Gr-PANI) composite fillers. The Gr sheets are welded with PANI via pi-pi non-covalent interactions. Furthermore, a flexible polyimide (PI) composite film with superior EMI shielding effectiveness is prepared by in situ polymerization. The 40% content of Gr-PANI(10:1) (the mass ratio of Gr to PANI is 10 : 1) shows a superior electrical conductivity (sigma) as high as 2.1 +/- 0.1 S cm(-1), 1.45 times higher than that of Gr@PI film at the same loading. Moreover, the total shielding effectiveness (SET) of EMI of the Gr-PANI(10:1)@PI reaches similar to 21.3 dB and an extremely high specific shielding effectiveness value (SSE) of 4096.2 dB cm(2) g(-1) is achieved. Such a "non-covalent welding" approach provides a facile strategy to prepare high-performance PI-based materials for efficient EMI shielding.
机译:随着电子工业需求的日益增长,电磁干扰(EMI)屏蔽已成为严重限制设备应用的关键问题。在这项工作中,我们提出了一种“非共价焊接”方法来制造石墨烯 - 聚苯胺(GR-PANI)复合填料。通过PI-PI非共价相互作用,用PANI焊接GR板。此外,通过原位聚合制备具有优异的EMI屏蔽效果的柔性聚酰亚胺(PI)复合膜。 GR-PANI(10:1)的40%含量(GR对PANI的质量比为10:1)显示出高达2.1 +/- 0.1 S cm(-1),1.45的优异的导电性(Sigma)在同一负载下比GR @ PI膜高的时间。此外,GR-PANI(10:1)@PI的EMI的总屏蔽效果(SET)类似于21.3dB和4096.2dB(2)G(2)G(-1)的极高特定屏蔽效能(SSE)(-1 ) 已完成。这种“非共价焊接”方法提供了一种用于制备高性能PI基材料的容易策略,以实现高效的EMI屏蔽。

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  • 来源
    《RSC Advances》 |2020年第4期|共10页
  • 作者单位

    Univ Shanghai Sci &

    Technol Sch Mat Sci &

    Engn Shanghai 200093 Peoples R China;

    Univ Shanghai Sci &

    Technol Sch Mat Sci &

    Engn Shanghai 200093 Peoples R China;

    Univ Shanghai Sci &

    Technol Sch Mat Sci &

    Engn Shanghai 200093 Peoples R China;

    Univ Shanghai Sci &

    Technol Sch Mat Sci &

    Engn Shanghai 200093 Peoples R China;

    Univ Shanghai Sci &

    Technol Sch Mat Sci &

    Engn Shanghai 200093 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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