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The study on the electromagnetic properties of polyurethane coated pre-oxidized fiber felt composites

机译：聚氨酯涂覆预氧化纤维毡复合材料的电磁特性研究

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摘要

In this study, coated pre-oxidized fiber felt composites were prepared using the PU2540 polyurethane as a matrix and adopting a coating technology on the pre-oxidized fiber felt. Firstly, influences of wave-absorbing functional particles on the dielectric properties and shielding effectiveness of single-layer coated pre-oxidized fiber felt composites were analyzed and compared. Secondly, influences of the graphene content on the dielectric properties and shielding effectiveness of graphene coated pre-oxidized fiber felt composites were discussed. Results showed that values of the real and imaginary parts and loss tangent value of the dielectric constant for graphene coated pre-oxidized fiber felt composites were all larger than those of graphite coated pre-oxidized fiber felt composites, that is, the former had a stronger polarization ability, dissipation ability and attenuation ability to electromagnetic waves than the latter. However, the shielding effectiveness of the latter was larger than that of the former, that is, the shielding ability of graphite coated pre-oxidized fiber felt composites was better than that of graphene coated pre-oxidized fiber felt composites. When the graphene content was 15% of the mass of the polyurethane, the value of the imaginary part and loss tangent value of the dielectric constant for graphene coated pre-oxidized fiber felt composites were both the largest, and the dissipation ability and attenuation ability to electromagnetic waves were both the strongest.
机译：在该研究中，使用PU2540聚氨酯作为基质制备涂覆的预氧化纤维毡复合，并采用涂布技术对预氧化纤维感受。首先，分析并比较了波浪吸收功能颗粒对单层涂覆的预氧化纤维毡复合材料的电介质性能和屏蔽有效性的影响。其次，讨论了石墨烯含量对石墨烯涂覆的预氧化纤维毡复合材料的电介质性质和屏蔽有效性的影响。结果表明，石墨烯涂覆的预氧化纤维毡复合材料的真实和虚部和损耗切线值的值均大于石墨涂覆的预氧化纤维毡复合材料，即前者具有更强的偏振能力，耗散能力和衰减能力与后者的电磁波。然而，后者的屏蔽效果大于前者的屏蔽效果，即石墨涂覆的预氧化纤维毡复合材料的屏蔽能力优于石墨烯涂覆的预氧化纤维毡复合材料。当石墨烯含量为聚氨酯质量的15％时，金属膜涂覆的预氧化纤维毡复合材料的介电部分和介电常数的损耗正切值都是最大的，并且耗散能力和衰减能力电磁波都是最强的。

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  • 来源
    《The Journal of the Textile Institute》 |2021年第10期|1596-1601|共6页
  • 作者

    Liu Yuanjun; Bao Wenli; Zhao Xiaoming;

  • 作者单位

    Tiangong Univ Sch Text Sci & Engn 399 Binshui West Rd Tianjin 300387 Peoples R China|Tiangong Univ Tianjin Key Lab Adv Text Composites Tianjin Peoples R China|Tianjin Polytech Univ Tianjin Municipal Key Lab Adv Fiber & Energy Stor Tianjin Peoples R China;

    Tiangong Univ Sch Text Sci & Engn 399 Binshui West Rd Tianjin 300387 Peoples R China;

    Tiangong Univ Sch Text Sci & Engn 399 Binshui West Rd Tianjin 300387 Peoples R China|Tiangong Univ Tianjin Key Lab Adv Text Composites Tianjin Peoples R China|Tianjin Polytech Univ Tianjin Municipal Key Lab Adv Fiber & Energy Stor Tianjin Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Coating; pre-oxidized fiber felt; dielectric constant; shielding effectiveness;

    机译：涂层;预氧化纤维毡;介电常数;屏蔽效果;

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