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轻质高强MXene/细菌纤维素复合气凝胶的制备及其电磁屏蔽性能

张艳 马忠雷 李桢 景佳瑶 邵亮

张艳, 马忠雷, 李桢, 等. 轻质高强MXene/细菌纤维素复合气凝胶的制备及其电磁屏蔽性能[J]. 复合材料学报, 2023, 40(11): 6407-6415. doi: 10.13801/j.cnki.fhclxb.20230109.003
引用本文: 张艳, 马忠雷, 李桢, 等. 轻质高强MXene/细菌纤维素复合气凝胶的制备及其电磁屏蔽性能[J]. 复合材料学报, 2023, 40(11): 6407-6415. doi: 10.13801/j.cnki.fhclxb.20230109.003
ZHANG Yan, MA Zhonglei, LI Zhen, et al. Preparation and EMI shielding properties of lightweight and mechanically strong MXene/bacterial cellulose composite aerogels[J]. Acta Materiae Compositae Sinica, 2023, 40(11): 6407-6415. doi: 10.13801/j.cnki.fhclxb.20230109.003
Citation: ZHANG Yan, MA Zhonglei, LI Zhen, et al. Preparation and EMI shielding properties of lightweight and mechanically strong MXene/bacterial cellulose composite aerogels[J]. Acta Materiae Compositae Sinica, 2023, 40(11): 6407-6415. doi: 10.13801/j.cnki.fhclxb.20230109.003

轻质高强MXene/细菌纤维素复合气凝胶的制备及其电磁屏蔽性能

doi: 10.13801/j.cnki.fhclxb.20230109.003
基金项目: 国家自然科学基金(52273083;51903145); 陕西省重点研发计划项目(2023-YBGY-476);中央高校基本科研业务费专项资金(D5000210627)
详细信息
    通讯作者:

    马忠雷,博士,副教授,硕士生导师,研究方向为功能高分子复合材料 E-mail: mazl@nwpu.edu.cn;

    邵亮,博士,教授,博士生导师,研究方向为功能高分子复合材料 E-mail: shaoliang@sust.edu.cn

  • 中图分类号: TB332

Preparation and EMI shielding properties of lightweight and mechanically strong MXene/bacterial cellulose composite aerogels

Funds: National Natural Science Foundation of China (52273083; 51903145); Key Research and Development Project of Shaanxi Province (2023-YBGY-476); Fundamental Research Funds for the Central Universities (D5000210627)
  • 摘要: 随着5G通讯和可穿戴电子设备等高集成化和高功率化的快速发展,由电磁波引起的电磁干扰和电磁污染问题日益严重,亟需研发轻质高强且环境友好的电磁屏蔽复合材料。本文以生物质细菌纤维素(BC)为基体,导电Ti3C2Tx MXene为功能填料,通过液氮定向冷冻-冷冻干法制备轻质高强定向多孔结构MXene/BC复合气凝胶。深入研究了Ti3C2Tx MXene质量分数对复合气凝胶微观结构、导电性能、力学性能和电磁屏蔽性能的影响规律。结果表明:当Ti3C2Tx MXene质量分数为40wt%时,复合气凝胶的密度仅为18.3 mg/cm3,电导率和X波段电磁屏蔽效能 (EMI SE)均达到最大,分别为459.3 S/cm和72 dB (厚度为4 mm)。由于BC和Ti3C2Tx MXene之间存在丰富的氢键相互作用,复合气凝胶在30%应变下压缩强度达到38.3 kPa,较纯BC气凝胶提升了116.1%。

     

  • 图  1  定向多孔结构MXene/生物质细菌纤维素(BC)复合气凝胶的制备示意图

    Figure  1.  Schematic diagram for preparation of MXene/bacterial cellulose (BC) composite aerogels

    图  2  Ti3AlC2 (a)和Ti3C2Tx MXene (b)的SEM图像;Ti3C2Tx MXene的TEM图像(c)和XRD图谱(d)

    Figure  2.  SEM images of Ti3AlC2 (a) and Ti3C2Tx MXene (b); TEM images (c) and XRD patterns (d) of Ti3C2Tx MXene

    图  3  定向多孔结构 MXene/BC 复合气凝胶的数码照片((a)~(e))和相应不同放大倍数下的SEM图像((a')~(e''))

    Figure  3.  Digital photos ((a)~(e)) and corresponding SEM images ((a')~(e'')) of MXene/BC composite aerogels with directional porous structures

    图  4  Ti3C2Tx MXene质量分数为30wt%时MXene/BC复合气凝胶的顶视(a)和侧视(b) SEM图像

    Figure  4.  Top view (a) and side view (b) SEM images of MXene/BC composite aerogels with the Ti3C2Tx MXene mass fraction of 30wt%

    图  5  BC、Ti3C2Tx MXene和MXene/BC复合气凝胶的XRD图谱(a)、XPS图谱(b)和FTIR图谱(c)

    Figure  5.  XRD patterns (a), XPS spectra (b) and FTIR spectra (c) of BC, Ti3C2Tx MXene and MXene/BC composite aerogels

    图  6  不同Ti3C2Tx MXene质量分数MXene/BC复合气凝胶的质量密度

    Figure  6.  Mass densities of the MXene/BC composite aerogels with different Ti3C2Tx MXene mass fractions

    图  7  (a)不同Ti3C2Tx MXene质量分数MXene/BC复合气凝胶的压缩应力-应变曲线;(b)承载500 g砝码的MXene/BC复合气凝胶数码照片

    Figure  7.  (a) Compression stress-strain curves of MXene/BC composite aerogels with different Ti3C2Tx MXene mass fractions; (b) Digital photos of MXene/BC composite aerogels loaded with 500 g

    图  8  (a)不同Ti3C2Tx MXene质量分数MXene/BC复合气凝胶的电导率;(b) MXene/BC 复合气凝胶集成电路点亮LED 灯的数码照片

    Figure  8.  (a) Electrical conductivities of MXene/BC composite aerogels with different Ti3C2Tx MXene mass fractions; (b) Digital photo of MXene/BC composite aerogel integrated circuits illuminating LED

    图  9  不同Ti3C2Tx MXene质量分数MXene/BC复合气凝胶电磁屏蔽效能(EMI SE) (a)和反射损耗(SER)、吸收损耗(SEA)和总电磁屏蔽效能(SET)(b);(c)单位厚度比屏蔽效能(SSE/t);(d)电磁屏蔽效率;(e)试样厚度对30wt%Ti3C2Tx MXene复合气凝胶EMI SE的影响;(f)电磁屏蔽机制

    Figure  9.  Electromagnetic interference shielding effectiveness (EMI SE) (a) and SE reflection (SER), SE absorption (SEA), SE total (SET) (b) of MXene/BC composite aerogels with different Ti3C2Tx MXene mass fractions; (c) Specific shielding effectiveness per unit thickness (SSE/t); (d) Electromagnetic shielding efficiency; (e) Effects of thickness on the EMI SE of composite aerogels with 30wt%Ti3C2Tx MXene; (f) Electromagnetic shielding mechanism

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出版历程
  • 收稿日期:  2022-11-30
  • 修回日期:  2022-12-24
  • 录用日期:  2022-12-26
  • 网络出版日期:  2023-01-10
  • 刊出日期:  2023-11-01

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