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<p>Piezoresistive pressure sensors have prospects in the applications of pulse testing and wearable health monitoring. The sensing material involved is the key factor in sensor performance. Indium Tin Oxide nanocrystalline was used as conductive fillers, and waterborne polyurethane (WPU) was used as an elastic matrix; then the simple composite used as piezoresistive sensing material was prepared. Thus, a low-cost, high-sensitivity pressure sensor composed of this sensing material has been completed and measured. The sensor has a wide detection range (0–200&#xa0;kPa), short response time (7&#xa0;ms), high sensitivity (10&#xa0;kPa<sup>−1</sup>), and good stability during repeated loading/unloading. In particular, the electrical signal of the sensor can maintain a linear relationship with the pressure over a large range of pressures, and it is expected to convert the electrical signal directly into a pressure signal. Therefore, it has prospects in the real-time monitoring of human pulse signals. At the same time, the sensor can also be used for respiratory monitors, speech recognition, or human movement detection. It provides a new selection of tactile sensors with low cost, high sensitivity, and wide detection range for industrial production.</p>

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Piezoresistive sensors with sensing composite film of indium tin oxide nanocrystalline and waterborne polyurethane

  • 期刊论文

  • 发表日期：

    2025年8月8日

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  • Chenming Gao,
  • Pengju Huang,
  • Ke Li,
  • Xinming Lin,
  • Jiangtao Zuo,
  • Yiwen Luo,
  • Gaoyu Zhong

摘要

Piezoresistive pressure sensors have prospects in the applications of pulse testing and wearable health monitoring. The sensing material involved is the key factor in sensor performance. Indium Tin Oxide nanocrystalline was used as conductive fillers, and waterborne polyurethane (WPU) was used as an elastic matrix; then the simple composite used as piezoresistive sensing material was prepared. Thus, a low-cost, high-sensitivity pressure sensor composed of this sensing material has been completed and measured. The sensor has a wide detection range (0–200 kPa), short response time (7 ms), high sensitivity (10 kPa−1), and good stability during repeated loading/unloading. In particular, the electrical signal of the sensor can maintain a linear relationship with the pressure over a large range of pressures, and it is expected to convert the electrical signal directly into a pressure signal. Therefore, it has prospects in the real-time monitoring of human pulse signals. At the same time, the sensor can also be used for respiratory monitors, speech recognition, or human movement detection. It provides a new selection of tactile sensors with low cost, high sensitivity, and wide detection range for industrial production.