The sensitivity of the electronic properties of carbon nanotubes to gases, chemicals, temperature, and mechanical strain enables their use as fillers in nanocomposites for sensing applications. In this paper, the authors develop a low-cost and scalable process based on inkjet printing technology to fabricate printed flexible sensors used for strain and damage detection. A well-dispersed conductive water-based ink is fabricated with functionalized multiwall carbon nanotubes (MWCNT) and deposited onto paper and Kapton substrates to obtain a sheet resistance as low as 500 Ω/sq with about 30 printed layers. The number of printed layers, the direction of the electrical resistance measurement, and the type of substrate have clear effects on the sensor's electrical performances related to the detection of mechanical strain and impact damage. This work demonstrates the effectiveness of the printed sensors for micrometeoroid and orbital debris (MMOD) impact damage detection through hypervelocity testing.

中文翻译：

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用于 MMOD 冲击检测的多功能喷墨印刷传感器

碳纳米管的电子特性对气体、化学品、温度和机械应变的敏感性使其能够用作纳米复合材料中的填料，以用于传感应用。在本文中，作者开发了一种基于喷墨打印技术的低成本且可扩展的工艺，以制造用于应变和损伤检测的印刷柔性传感器。使用功能化的多壁碳纳米管 (MWCNT) 制造了一种分散良好的导电水性油墨，并将其沉积在纸和 Kapton 基材上，以获得低至 500 Ω/sq 的薄层电阻，大约有 30 个印刷层。印刷层数、电阻测量方向和基板类型对传感器与机械应变和冲击损伤检测相关的电气性能有明显影响。