Experiment and theory study on the electrical property of MWCNT filled thermoplastic polyurethane bilayer composites with tunable layer thickness ratios
Experiment and theory study on the electrical property of MWCNT filled thermoplastic polyurethane bilayer composites with tunable layer thickness ratios
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层厚比可调的MWCNT填充热塑性聚氨酯双层复合材料电性能实验与理论研究
DOI：
10.1016/j.polymertesting.2022.107749
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发表时间：
2022-11
期刊：
影响因子：
5.1
通讯作者：
Shaoyun Guo
中科院分区：
文献类型：
--
作者：
Jinxiang Ai;Bingbing Zeng;Jingxian Qin;Yu Zheng;Shaoyun Guo
采用层组装共挤出法制备了层厚比可调的热塑性聚氨酯（TPU）/多壁碳纳米管（MWCNTs）填充TPU（cTPU）双层复合材料，同时保持填料在整个复合材料中的填充量为1wt%。采用并联电路模型对双层复合材料的电阻率进行了预测，但理论值总是低于实验值。结果表明，预测的偏差源于粒子在界面处的迁移，并随着MWCNTs从cTPU向TPU迁移的增强而逐渐消失。在此基础上，考虑颗粒迁移对模型进行了修正，并解释了预测偏差的演变。与具有相同组成的共混物复合材料表现出绝缘性不同，双层复合材料表现出良好的导电性，这可以通过使cTPU层变薄来大大优化。双层复合材料还具有平衡的机械性能，并表现出优异的吸收为主的电磁干扰屏蔽效果。这项工作提供了指导定制的导电聚合物复合材料的性能。·通过层组装共挤出制造双层复合材料。·通过改变层厚比来调整MWCNT的分层分布。·基于并联电路模型的导电电阻率预测。·实现了可调的电性能。
The thermoplastic polyurethane (TPU)/multi-walled carbon nanotubes (MWCNTs) filled TPU (cTPU) bilayer composites with tunable layer thickness ratios were fabricated via layer-assembly coextrusion, while keeping the filler loading in whole composite at 1 wt%. The parallel circuit model was used to predict the electrical resistivity of bilayer composites, but the theoretical value was always lower than the experimental result. It was revealed that the predicted deviation originated from the particle transfer at interface and gradually disappeared with the enhanced migration of MWCNTs from cTPU into TPU. Then, the model was modified with a consideration of particle transfer and applied to explain the evolution of predicted deviation. Unlike the blend composite with the same composition exhibiting an insulation, the bilayer composites presented a good conductivity which could be greatly optimized by thinning the cTPU layer. The bilayer composites also possessed balanced mechanical properties and showed excellent absorption-dominated electromagnetic interference shielding effectiveness. This work offers guidance for tailoring the performance of conductive polymer composites. • Fabrication of bilayer composites via layer-assembly coextrusion. • Tailoring the layered distribution of MWCNTs via varying the layer thickness ratio. • Prediction of conductive resistivity based on a parallel circuit model. • Tunable electrical properties were realized.
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影响因子：
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DOI：
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发表时间：
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期刊：
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影响因子：
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