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碳纳米管改性CF/PEEK复合材料的力学与电磁屏蔽性能

瞿明城 张礼颖 周剑锋 刘旋 章嘉豪 杨丽丽 朱姝

瞿明城, 张礼颖, 周剑锋, 等. 碳纳米管改性CF/PEEK复合材料的力学与电磁屏蔽性能[J]. 复合材料学报, 2022, 39(7): 3251-3261. doi: 10.13801/j.cnki.fhclxb.20211126.001
引用本文: 瞿明城, 张礼颖, 周剑锋, 等. 碳纳米管改性CF/PEEK复合材料的力学与电磁屏蔽性能[J]. 复合材料学报, 2022, 39(7): 3251-3261. doi: 10.13801/j.cnki.fhclxb.20211126.001
QU Mingcheng, ZHANG Liying, ZHOU Jianfeng, et al. Effect of carbon nanotube reinforcement on the mechanical and EMI shielding properties of CF/PEEK composites[J]. Acta Materiae Compositae Sinica, 2022, 39(7): 3251-3261. doi: 10.13801/j.cnki.fhclxb.20211126.001
Citation: QU Mingcheng, ZHANG Liying, ZHOU Jianfeng, et al. Effect of carbon nanotube reinforcement on the mechanical and EMI shielding properties of CF/PEEK composites[J]. Acta Materiae Compositae Sinica, 2022, 39(7): 3251-3261. doi: 10.13801/j.cnki.fhclxb.20211126.001

碳纳米管改性CF/PEEK复合材料的力学与电磁屏蔽性能

doi: 10.13801/j.cnki.fhclxb.20211126.001
基金项目: 国家自然科学基金面上项目(52173247);上海市科委科研计划项目(20511107200); 国家大学生创新创业训练项目(202110255086)
详细信息
    通讯作者:

    朱姝,博士,副教授,硕士生导师,研究方向为航空级热塑性复合材料、结构功能一体化复合材料  E-mail: zhushu@dhu.edu.cn

  • 中图分类号: TB332;V261.97

Effect of carbon nanotube reinforcement on the mechanical and EMI shielding properties of CF/PEEK composites

  • 摘要: 为了制备兼具优异力学性能和电磁干扰屏蔽效能的结构功能一体化耐高温热塑性复合材料,对添加不同组分碳纳米管(CNT)的连续碳纤维增强聚醚醚酮复合材料(CF-CNT/PEEK)的力学性能、电导率以及电磁干扰屏蔽效能(EMI SE)进行了研究。考察用上浆后的CNT (SCNT)作为导电填料制备的SCF-SCNT/PEEK层合板力学性能、界面形貌和屏蔽效能,并与不进行表面修饰、仅活化的CNT (ACNT)的效果做对比实验。结果表明,适量的CNT会使CF/PEEK层合板的力学性能、电导率和EMI SE得到提高;SCNT比ACNT更容易在PEEK中均匀分散,且与SCF和PEEK的结合更好。所有样品中,仅添加1wt%SCNT的SCF-SCNT/PEEK层合板与不添加CNT的层合板相比,拉伸强度提高了20.8%,达到778 MPa;弯曲强度提高了25.9%,达到1684 MPa;电导率提升5倍,达到0.15 S/cm;电磁干扰屏蔽效能提升69.76%,平均值达到34.97 dB。

     

  • 图  1  SCF-SCNT/PEEK层合板模压成型流程图

    Figure  1.  Schematic diagram for process of SCF-SCNT/PEEK Laminates

    CF—Carbon fiber; PEEK—Poly(ether-ether-ketone); CNT—Carbon nanotube; DMSO—Dimethyl sulfoxide; SPEEK—Sulfonated poly(ether-ether-ketone); SCF—Sized carbon fiber; SCNT—Sized carbon nanotube

    图  2  SPEEK和PEEK的FTIR图谱

    Figure  2.  FTIR spectras of SPEEK and PEEK

    图  3  CNT和ACNT的XPS图谱

    Figure  3.  XPS patterns of CNT and ACNT

    图  4  ACNT (a)以及ACNT与SCNT联合(b)的热重分析曲线

    Figure  4.  TGA curves of ACNT (a) and ACNT with SCNT (b)

    图  5  SPEEK热重分析图谱(a)以及ACNT与SCNT联合的FTIR图谱(b)

    Figure  5.  TGA spectra of SPEEK (a) and FTIR spectra of ACNT and SCNT (b)

    图  6  不同CNT组分的SCF-CNT/PEEK层合板的力学性能

    Figure  6.  Mechanical properties of SCF-CNT/PEEK laminates with different CNT contents

    图  7  不同CNT组分层合板拉伸断裂后断面SEM图像:(a) SCF-0wt%ACNT/PEEK;(b) SCF-1wt%ACNT/PEEK;(c) SCF-1wt%SCNT/PEEK;(d) SCF-3wt%SCNT/PEEK;(e) SCF-5wt%SCNT/PEEK

    Figure  7.  SEM images of the laminates with different contents of CNT:(a) SCF-0wt%ACNT/PEEK; (b) SCF-1wt%ACNT/PEEK; (c) SCF-1wt%SCNT/PEEK; (d) SCF-3wt%SCNT/PEEK; (e) SCF-5wt%SCNT/PEEK

    图  8  不同CNT组分层合板金相显微镜图像:(a) SCF-0wt%ACNT/PEEK;(b) SCF-1wt%ACNT/PEEK;(c) SCF-1wt%SCNT/PEEK;(d) SCF-3wt%SCNT/PEEK;(e) SCF-5wt%SCNT/PEEK

    Figure  8.  Metallurgical microscope images of the laminates with different contents of CNT:(a) SCF-0wt% ACNT/PEEK; (b) SCF-1wt%ACNT/PEEK; (c) SCF-1wt%SCNT/PEEK; (d) SCF-3wt%SCNT/PEEK; (e) SCF-5wt%SCNT/PEEK

    图  9  SCF-SCNT/PEEK中不同部位的FESEM图像:SCF与SCNT的排布((a)、(b) );PEEK中团聚的SCNT((c)、(d))

    Figure  9.  FESEM images of different parts of SCF-SCNT/PEEK: SCNT around the SCF ((a), (b)); SCNT agglomerates within the PEEK ((c), (d) )

    图  10  (a)不同CNT组分层合板的总屏蔽效能值(ETotal);(b) SCF-1wt% SCNT/PEEK层合板的反射率(R)、透射率(T)、吸收率(A)参数与电磁干扰屏蔽效能(EMI SE)组成

    Figure  10.  (a) Total shielding effectiveness (ETotal) spectra of the laminates with different contents of CNT; (b) Reflected (R), transmitted (T), absorbed (A) index and the component of the electromagnetic interference shielding effectiveness (EMI SE) of SCF-1wt% SCNT/PEEK

    表  1  不同组分SCF-CNT/PEEK层合板中原料的质量

    Table  1.   The mass of raw materials in SCF-CNT/PEEK laminates with different components

    No.SampleMass of SCNT/gMass of ACNT/gMass of PEEK/g
    1SCF-0wt%ACNT/PEEK0025.00
    2SCF-1wt%ACNT/PEEK00.2524.75
    3SCF-1wt%SCNT/PEEK0.25024.75
    4SCF-3wt%SCNT/PEEK0.75024.25
    5SCF-5wt%SCNT/PEEK1.25023.75
    Notes: PEEK—Poly(ether-ether-ketone); SCF—Sized carbon fiber; SCNT—Sized carbon nanotube; ACNT—Activated carbon nanotube.
    下载: 导出CSV

    表  2  SPEEK磺化度酸碱滴定法测定结果

    Table  2.   Sulfonation degree of SPEEK measured by acid-base titration

    No.12345
    Sulfonation degree/%7.97.67.87.77.5
    下载: 导出CSV

    表  3  CNT酸化前后表面C与O元素相对原子数分数

    Table  3.   Relative atomic fractions of C and O elements on the surface of CNT before and after acidification

    NameC/at%O/at%O/C
    CNT98.821.180.012
    ACNT86.3213.680.158
    Notes:O/C—Relative atomic fractions of C is divided by the relative atomic fractions of O.
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-09-30
  • 修回日期:  2021-11-15
  • 录用日期:  2021-11-17
  • 网络出版日期:  2021-11-26
  • 刊出日期:  2022-07-30

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