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首页> 外文期刊>Composites >Effect of carbon nanotube type and functionalization on the electrical, thermal, mechanical and electromechanical properties of carbon nanotube/styrene-butadiene-styrene composites for large strain sensor applications
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Effect of carbon nanotube type and functionalization on the electrical, thermal, mechanical and electromechanical properties of carbon nanotube/styrene-butadiene-styrene composites for large strain sensor applications

机译：碳纳米管类型和功能化对用于大型应变传感器的碳纳米管/苯乙烯-丁二烯-苯乙烯复合材料的电，热，机械和机电性能的影响

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摘要

Thermoplastic elastomer tri-block copolymer, namely styrene-butadiene-styrene (SBS) composites filled with carbon nanotubes (CNT) are characterized with the main goal of obtaining electro-mechanical composites suitable for large deformation sensor applications. CNT/SBS composites with different filler contents and filler functionalizations are studied by morphological, thermal, mechanical and electrical analyses. It is shown that the different dispersion levels of CNT in the SBS matrix are achieved for pristine or functionalized CNT with strong influence in the electrical properties of the composites. In particular covalently functionalized CNTs show percolation thresholds higher than 8 weight percentage (wt%) whereas pristine CNT show percolation threshold smaller than 1 wt%. On the other hand, CNT functionalization does not alter the conduction mechanism which is related to hopping between the CNT for concentrations higher than the percolation threshold. Pristine single and multiwall CNT within the SBS matrix allow the preparation of composites with electro-mechanical properties appropriate for strain sensors for deformations up to 5% of strain, the gauge factor varying between 2 and 8. Composites close to the percolation threshold show larger values of the gauge factor.
机译：热塑性弹性体三嵌段共聚物，即填充有碳纳米管（CNT）的苯乙烯-丁二烯-苯乙烯（SBS）复合材料，其主要目标是获得适用于大变形传感器应用的机电复合材料。通过形态学，热学，力学和电学分析研究了具有不同填料含量和填料功能化的CNT / SBS复合材料。结果表明，对于原始的或官能化的CNT，在SBS基质中获得了不同的CNT分散水平，这对复合材料的电性能产生了很大的影响。特别地，共价官能化的CNT显示出大于8重量百分比（wt％）的渗透阈值，而原始的CNT显示出小于1wt％的渗透阈值。另一方面，CNT功能化不会改变与浓度高于渗滤阈值的CNT之间的跳跃有关的传导机制。 SBS基质中的原始单壁和多壁CNT允许制备具有机电特性的复合材料，适用于应变传感器，变形量高达5％，应变系数在2到8之间变化。接近渗流阈值的复合材料显示更大的值规格因子。

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  • 来源
    《Composites》 |2014年第5期|136-146|共11页
  • 作者

    P. Costa; J. Silva; A. Anson-Casaos; M.T. Martinez; M.J. Abad; J. Viana; S. Lanceros-Mendez;

  • 作者单位

    Center/Dept. of Physics, Minho University, 4710-058 Braga, Portugal;

    Center/Dept. of Physics, Minho University, 4710-058 Braga, Portugal;

    Institute of Carboquimica ICB-CSIC, Miguel Luesma Castan 4, 50018 Zaragoza, Spain;

    Institute of Carboquimica ICB-CSIC, Miguel Luesma Castan 4, 50018 Zaragoza, Spain;

    Grupo de Polimeros, University of A Coruna, CIT - Campus de Esteiro, 15403 Ferrol, Spain;

    Institute for Polymers and Composites IPC/I3N, University of Minho, 4800-058 Guimaraes, Portugal;

    Center/Dept. of Physics, Minho University, 4710-058 Braga, Portugal;

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

    A. Polymer-matrix composites (PMCs); B. Electrical properties; D. Mechanical testing;

    机译：A.聚合物基复合材料（PMC）;B.电性能;D.机械测试;

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