Abstract Stretchable strain sensors have promising potentials in wearable electronics for human motion detection, health monitoring and so on. A reliable strain sensor with high flexibility and good stability should be designed to detect human joints motions with a large deformation. Here, a simple and facile solution mixing-casting method was adopted to fabricate a highly stretchable strain sensor based on composites mixing polydimethylsiloxane (PDMS) with hybrid carbon nanotubes (CNTs) and carbon black (CB) conductive nanofillers (CNTs-CB). Bridged and overlapped hybrid CNTs-CB nanofillers structure was achieved in the composite on the basis of the morphology observation. In monotonic stretching test, the CNTs-CB/PDMS composites strain sensors exhibited high stretchability, strain-dependent sensitivity in a wide strain sensing range (ca. 300% strain) and an excellent linear current-voltage behavior. During stretching-releasing cycles, the strain sensors presented excellent repeatability, good stability and superior durability (2500 cycles at 200% strain). Combined with the above outstanding strain sensing performances, the fabricated stretchable strain sensors were attached onto different joints of human body to monitor the corresponding human motions, demonstrating their attractive perspective in large human motions detection.

中文翻译：

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基于混合碳纳米填料/聚二甲基硅氧烷导电复合材料的高度可拉伸且稳定的应变传感器，用于大型人体运动监测

摘要 可伸缩应变传感器在可穿戴电子产品中具有广阔的应用前景，可用于人体运动检测、健康监测等。应设计一种具有高灵活性和良好稳定性的可靠应变传感器来检测具有大变形的人体关节运动。在这里，采用一种简单易行的溶液混合浇铸方法，基于将聚二甲基硅氧烷 (PDMS) 与混合碳纳米管 (CNTs) 和炭黑 (CB) 导电纳米填料 (CNTs-CB) 混合的复合材料，制造了一种高度可拉伸的应变传感器。根据形态观察，在复合材料中实现了桥接和重叠的混合碳纳米管-碳纳米管纳米填料结构。在单调拉伸试验中，CNTs-CB/PDMS 复合材料应变传感器在很宽的应变传感范围（约 300% 应变）和出色的线性电流-电压特性。在拉伸-释放循环期间，应变传感器表现出出色的重复性、良好的稳定性和出色的耐用性（200% 应变下 2500 次循环）。结合上述出色的应变传感性能，将制作的可拉伸应变传感器贴在人体不同关节上以监测相应的人体运动，展示了其在大型人体运动检测中的吸引力。