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纳米粒子形貌对聚吡咯/LDPE纳米复合材料直流介电性能的影响

张城城 任兆辉 任强 赵洪

张城城, 任兆辉, 任强, 等. 纳米粒子形貌对聚吡咯/LDPE纳米复合材料直流介电性能的影响[J]. 复合材料学报, 2023, 40(5): 2598-2608. doi: 10.13801/j.cnki.fhclxb.20220809.009
引用本文: 张城城, 任兆辉, 任强, 等. 纳米粒子形貌对聚吡咯/LDPE纳米复合材料直流介电性能的影响[J]. 复合材料学报, 2023, 40(5): 2598-2608. doi: 10.13801/j.cnki.fhclxb.20220809.009
ZHANG Chengcheng, REN Zhaohui, REN Qiang, et al. Influence of nanoparticle morphology on the direct current dielectric properties of polypyrrole/LDPE nanocomposites[J]. Acta Materiae Compositae Sinica, 2023, 40(5): 2598-2608. doi: 10.13801/j.cnki.fhclxb.20220809.009
Citation: ZHANG Chengcheng, REN Zhaohui, REN Qiang, et al. Influence of nanoparticle morphology on the direct current dielectric properties of polypyrrole/LDPE nanocomposites[J]. Acta Materiae Compositae Sinica, 2023, 40(5): 2598-2608. doi: 10.13801/j.cnki.fhclxb.20220809.009

纳米粒子形貌对聚吡咯/LDPE纳米复合材料直流介电性能的影响

doi: 10.13801/j.cnki.fhclxb.20220809.009
基金项目: 国家自然科学基金(51707049);黑龙江省普通本科高等学校青年创新人才培养计划(UNPYSCT-2016027)
详细信息
    通讯作者:

    张城城,博士,副教授,硕士生导师,研究方向为聚合物绝缘材料改性及其介电性能研究 E-mail: cczh0111@126.com

  • 中图分类号: TB332

Influence of nanoparticle morphology on the direct current dielectric properties of polypyrrole/LDPE nanocomposites

Funds: National Natural Science Foundation of China (51707049); University Nursing Program for Young Scholars with Creative Talents in Heilongjiang Province (UNPYSCT-2016027)
  • 摘要: 为了研究不同微观形貌的纳米导电粒子对低密度聚乙烯(LDPE)直流介电性能的影响,本文采用软模板法制备了直径约100 nm的聚吡咯(PPy)纳米球和纳米线,并将其与LDPE熔融共混制备得到了PPy/LDPE纳米复合材料。利用扫描电子显微镜(SEM)观察了PPy纳米粒子的微观形貌及其在PPy/LDPE纳米复合材料中的分散结构,并测试了复合材料的结晶度、空间电荷分布、介电谱、不同温度下的直流电导电流及直流击穿强度等介电性能。结果表明:PPy纳米粒子的加入可以提高LDPE的结晶度,抑制LDPE中空间电荷的累积,降低其相对介电常数、直流电导电流和直流击穿强度,其中PPy纳米球的加入可在不同温度下使LDPE直流电导电流降低1个数量级以上,而对其直流击穿强度的影响较小,并且在较高温度下可将LDPE的直流击穿强度提升4.4%。PPy纳米球对LDPE绝缘材料直流介电性能的改善效果要优于PPy纳米线。

     

  • 图  1  聚吡咯纳米球(PPy(S)) (a)和聚吡咯纳米线(PPy(W)) (b)的SEM图像

    Figure  1.  SEM images of polypyrrole nanospheres (PPy(S)) (a) and polypyrrole nanowires (PPy(W)) (b)

    图  2  LDPE和PPy/LDPE纳米复合材料的SEM图像

    Figure  2.  SEM images of LDPE and PPy/LDPE nanocomposites

    图  3  PPy纳米粒子、LDPE和PPy/LDPE纳米复合材料红外图谱

    Figure  3.  FTIR spectra of PPy nanoparticles, LDPE and PPy/LDPE nanocomposites

    图  4  LDPE和PPy/LDPE纳米复合材料的DSC曲线

    Figure  4.  DSC curves of LDPE and PPy/LDPE nanocomposites

    图  5  LDPE空间电荷分布

    Figure  5.  Space charge distribution of LDPE

    图  6  PPy/LDPE纳米复合材料空间电荷分布

    Figure  6.  Space charge distribution of PPy/LDPE nanocomposites

    图  7  LDPE和PPy/LDPE纳米复合材料短路3 s时平均体电荷密度

    Figure  7.  Mean volume charge density of LDPE and PPy/LDPE nanocomposites during short circuit at 3 s

    图  8  PPy(S)和PPy(W)的电导率

    Figure  8.  Conductivity of PPy(S) and PPy(W)

    图  9  LDPE和PPy/LDPE纳米复合材料在不同温度下的电导电流密度曲线

    Figure  9.  Conductive current density curves of LDPE and PPy/LDPE nanocomposites at different temperatures

    图  10  LDPE和PPy/LDPE纳米复合材料在不同温度下的直流(DC)击穿强度Weibull分布图

    Figure  10.  Weibull distribution of direct current (DC) breakdown strength of LDPE and PPy/LDPE nanocomposites at different temperatures

    图  11  LDPE和PPy/LDPE纳米复合材料介电性能

    Figure  11.  Dielectric properties of LDPE and PPy/LDPE nanocomposites

    表  1  低密度聚乙烯(LDPE)及聚吡咯(PPy)/LDPE纳米复合材料的命名

    Table  1.   Nomenclature of low-density polyethylene (LDPE) and polypyrrole (PPy)/LDPE nanocomposites

    Material LDPE content/wt% PPy(S) content/wt% PPy(W) content/wt%
    LDPE 100 0 0
    PPy(S)/LDPE 100 0.5 0
    PPy(W)/LDPE 100 0 0.5
    Notes: PPy(S)―Polypyrrole nanospheres; PPy(W)―Polypyrrole nanowires.
    下载: 导出CSV

    表  2  LDPE和PPy/LDPE纳米复合材料DSC测试结果

    Table  2.   DSC test results of LDPE and PPy/LDPE nanocomposites

    SampleWc/%Tm/℃Tc/℃
    LDPE39.60110.8395.17
    PPy(S)/LDPE45.01109.6794.67
    PPy(W)/LDPE40.95110.3396.50
    Notes: Wc—Crystallinity of the sample; Tm and Tc—Melting and crystallization peak temperature, respectively.
    下载: 导出CSV
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  • 收稿日期:  2022-05-24
  • 修回日期:  2022-07-07
  • 录用日期:  2022-07-28
  • 网络出版日期:  2022-08-09
  • 刊出日期:  2023-05-15

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