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Preparation and laser sintering of a thermoplastic polyurethane carbon nanotube composite-based pressure sensor

机译：热塑性聚氨酯碳纳米管复合材料压力传感器的制备和激光烧结

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摘要

Selective laser sintering (SLS) is a desirable method for fabricating human motion detecting sensors as it can produce a complex shape with different materials that are machinable to specific applications. The bottleneck in the SLS processing of sensors is the preparation of a material that is both flexible and conductive. In this study, carbon nanotubes (CNTs) were selected as a conductive nanofiller and dispersed into a flexible thermoplastic polyurethane (TPU) polymer matrix to prepare TPU/CNT composites for SLS processing pressure sensors. CNTs were first oxidized to prevent them from aggregating in the TPU matrix. TPU/CNT composites were preparedviasolution blending and ball milling methods, and the dispersion of the CNTs in the composites was observed by scanning electron microscopy. The thermal properties of TPU/CNT composites with different CNT content were measured, and processing parameters used in the SLS were determined based on differential scanning calorimetry measurements. SLS-processed TPU/CNT composites were prepared with different conductivity and piezoresistive properties. Percolation theory and piezoresistive performance results proved that a 0.25 wt% CNT-containing TPU/CNT composite showed the best pressure sensing ability, and it was successfully used as a sensor to detect plantar pressure distribution in a human foot.
机译：选择性激光烧结（SLS）是一种用于制造人体运动检测传感器，因为它可以产生具有不同的材料是可机加工的特定应用复杂形状的理想的方法。在传感器的SLS处理的瓶颈是，既灵活和导电的材料的制备。在这项研究中，碳纳米管（CNT）被选定作为导电纳米填料和分散到柔性热塑性聚氨酯（TPU）聚合物基质以制备用于SLS处理压力传感器TPU / CNT复合材料。碳纳米管首先被氧化，以防止他们在TPU基质聚集。 TPU / CNT复合物是preparedviasolution共混和球磨方法，并且用扫描电子显微镜观察在复合材料中碳纳米管的分散。 TPU / CNT复合材料具有不同CNT含量的热特性进行测定，并且基于示差扫描热量测量处理在SLS中使用的参数进行了测定。 SLS加工TPU / CNT复合材料具有不同的导电性和压阻特性制备。渗透理论和压阻性能结果证明，含CNT的0.25重量％TPU / CNT复合显示出最好的压力感测能力，并且它被成功地用作传感器以检测在人脚足底压力分布。

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  • 来源
    《RSC Advances》 |2020年第40期|共9页
  • 作者

    Zhuang Yu; Guo Yanling; Li Jian; Jiang Kaiyi; Yu Yueqiang; Zhang Hui; Liu Dakun;

  • 作者单位

    Northeast Forestry Univ Sch Mechatron Engn Harbin 150040 Peoples R China;

    Northeast Forestry Univ Sch Mechatron Engn Harbin 150040 Peoples R China;

    Northeast Forestry Univ Sch Mechatron Engn Harbin 150040 Peoples R China;

    Northeast Forestry Univ Sch Engn &

    Technol Harbin 150040 Peoples R China;

    Northeast Petr Univ Coll Mech Sci &

    Engn Daqing 163318 Peoples R China;

    Northeast Forestry Univ Sch Mechatron Engn Harbin 150040 Peoples R China;

    Northeast Forestry Univ Sch Mechatron Engn Harbin 150040 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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