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高强MXene/PPy@BC复合薄膜的制备及其电磁屏蔽性能

唐婕 李翔

唐婕, 李翔. 高强MXene/PPy@BC复合薄膜的制备及其电磁屏蔽性能[J]. 复合材料学报, 2024, 42(0): 1-8.
引用本文: 唐婕, 李翔. 高强MXene/PPy@BC复合薄膜的制备及其电磁屏蔽性能[J]. 复合材料学报, 2024, 42(0): 1-8.
TANG Jie, LI Xiang. Preparation of high-strength MXene/PPy@BC composite films and their electromagnetic shielding properties[J]. Acta Materiae Compositae Sinica.
Citation: TANG Jie, LI Xiang. Preparation of high-strength MXene/PPy@BC composite films and their electromagnetic shielding properties[J]. Acta Materiae Compositae Sinica.

高强MXene/PPy@BC复合薄膜的制备及其电磁屏蔽性能

基金项目: 国家自然科学基金(52072245)
详细信息
    通讯作者:

    李翔,教授,博士,磁性功能材料方向; E-mail: xiangli@usst.edu.cn

Preparation of high-strength MXene/PPy@BC composite films and their electromagnetic shielding properties

Funds: National Natural Science Foundation of China (No.52072245)
  • 摘要: 随着通信技术和移动电子设备的不断发展,电磁干扰问题日益突显,因此研发高性能的电磁屏蔽材料成为当前重要的研究方向。本文采用简单的真空过滤方法,成功制备了高导电性能的MXene/聚吡咯(PPy)@细菌纤维素(BC)薄膜(MPB),深入研究了MXene和PPy@BC不同比例对复合薄膜导电性能、力学性能和电磁屏蔽性能的影响规律。研究表明:当MXene和PPy@BC比例为3∶1时,电导率和X波段电磁屏蔽效能(EMI SE)均达到最大值,分别1209 S/cm和63.89 dB;此外,由于PPy@BC和MXene之间存在丰富的氢键相互作用,使得复合薄膜的最大抗拉强度可达到24.73 MPa,较纯MXene薄膜提升了近10倍。MPB薄膜优异的综合性能展示了其在下一代智能和可穿戴电子产品的EMI屏蔽方面的巨大潜力。

     

  • 图  1  MXene/聚吡咯(PPy)@细菌纤维素(BC) (MPB)薄膜的制备流程图

    Figure  1.  Flow chart for the preparation of MXene/polypyrrole (PPy)@bacterial cellulose (BC) (MPB) films

    图  2  (a)纯BC的TEM照片;(b)纯BC的SEM照片;(c)PPy@BC的TEM照片;(d)Ti3C2Tx多层的SEM照片;(e)MPB的TEM照片;(f)MPB的SEM照片

    Figure  2.  (a) TEM image of pure BC; (b) SEM image of pure BC; (c) TEM image of PPy@BC; (d) SEM image of Ti3C2Tx multilayer; (e) TEM image of MPB; (f) SEM image of MPB

    图  3  MPB薄膜的EDS能谱图

    Figure  3.  EDS mapping images of MPB film

    图  4  MXene,PPy@BC和MPB的XRD图

    Figure  4.  XRD patterns of MXene, PPy@BC and MPB

    图  5  (a)纯MXene和MPB薄膜的XPS全谱图;(b)PPy@BC的N 1 s高分辨XPS谱图

    Figure  5.  (a) XPS full spectra of pure MXene and MPB films; (b) N 1 s high-resolution XPS spectra of PPy@BC

    图  6  (a) MPB薄膜的拉伸应力-应变曲线; (b) MPB薄膜的抗拉强度

    Figure  6.  (a) Tensile stress-strain curve of MPB film; (b) Tensile strength of MPB film

    图  7  MPB薄膜的电阻率变化

    Figure  7.  Resistivity variation of MPB film

    图  8  MPB 薄膜集成电路点亮 LED 灯的数码照片

    Figure  8.  Digital photo of MPB film IC lighting up an LED lamp

    图  9  不同 MXene和PPy@BC比例的MPB复合薄膜电磁屏蔽效能(EMI SE)(a),反射损耗(SER),吸收损耗(SEA)和总电磁屏蔽效能(SET)(b),R-A-T系数(c)

    Figure  9.  Electromagnetic shielding effectiveness (EMI SE) (a), reflection loss (SER), absorption loss (SEA) and total electromagnetic shielding effectiveness (SET) (b), and R-A-T coefficients (c) of MPB composite films with different MXene and PPy@BC ratios

    图  10  其他EMI屏蔽膜的电磁屏蔽性能比较

    Figure  10.  Comparison of electromagnetic shielding performance of other EMI shielding films

    图  11  MPB薄膜的电磁屏蔽机制图

    Figure  11.  Electromagnetic shielding mechanism diagrams of MPB films

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出版历程
  • 收稿日期:  2024-01-25
  • 修回日期:  2024-02-25
  • 录用日期:  2024-03-07
  • 网络出版日期:  2024-04-13

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