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A simple strategy to enhance electrical conductivity of nanotube-conjugate polymer composites via iodine-doping

机译：通过碘掺杂增强纳米管缀合物聚合物复合材料的电导率的简单策略

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摘要

Iodine-doping is useful in the development of high-conductivity carbon nanotube (CNT)-polymer composites. We prepared three types of CNT-polymer composites by in situ polymerization and obtained iodine-doped samples by mechanical mixing. A series of studies on electrical conductivity has proven that iodine doping is an effective way to obtain high-conductivity composites with heteroatoms in the polymer matrix. The conductivities of the doped samples increased by 4 orders of magnitude compared to the undoped samples. Based on the Hall-effect, Raman and XPS spectra, we propose that the synergistic effect between CNT and iodine results in superior properties. When the heteroatom is N, the synergistic effect of iodine and CNT helps to form a stronger p-pi conjugated system. The N cation radicals (as a type of carrier) increase with the enhanced conjugation, resulting in the improved conductivity. When the heteroatom is S, CNT and iodine form a separate pi-pi conjugated system and charge-transfer complex with S. The combination of the two interactions induces a boost in the carrier concentration, as well as the conductivity.
机译：碘掺杂可用于开发高导碳纳米管（CNT） - 聚合物复合材料。我们通过原位聚合制备了三种类型的CNT-聚合物复合材料，并通过机械混合获得碘掺杂样品。一系列关于导电性的研究已经证明，碘掺杂是在聚合物基质中获得具有杂原子的高导电性复合材料的有效方法。与未掺杂的样品相比，掺杂样品的电导率增加了4个数量级。基于霍尔效应，拉曼和XPS光谱，我们建议CNT和碘之间的协同效应导致优异的性质。当杂原子是n时，碘和CNT的协同作用有助于形成更强的P-PI缀合系统。 n阳离子自由基（作为载体的类型）随着增强的缀合而增加，导致导电性改善。当杂原子是S，CNT和碘形成单独的PI-PI缀合系统和与S的电荷转移复合物。两种相互作用的组合在载流子浓度以及导电中诱导升压。

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  • 来源
    《RSC Advances》 |2015年第95期|共5页
  • 作者

    Fan Lina; Xu Xuecheng;

  • 作者单位

    E China Normal Univ Dept Phys Shanghai 200241 Peoples R China;

    E China Normal Univ Dept Phys Shanghai 200241 Peoples R China;

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

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