Although the wearable strain sensors have received extensive research interest in recent years, it remains a huge challenge conforming the requirements in both of ultrahigh stretchability and high strain coefficient (gauge factor). Herein, a stretchable and flexible spandex fiber strain sensor coupled with carbon nanotubes (CNTs)/Ag nanoparticles (Ag NPs) that assembled through an efficient and large-scale layer-by layer self-assembly is presented. To ensure CNTs and Ag NPs can attach well to the spandex fiber without falling off, achieving high sensitivity under large tensile, sodium dodecyl benzene sulfonate, polyvinyl alcohol, and polystyrene sulfonic acid are introduced to improve the adhesion via the molecular entanglement and other interactions between them. Consequently, the strain sensor exhibits remarkable performance, such as an ultrahigh gauge factor of 58.5 in the low-strain range from 0% to 20%, a wide strain range (0%–200%), a fast response time of 42 ms and good working stability (>5000 stretching-releasing cycles). Subsequently, detailed mechanism of the sensor and its use in full range of human motion monitoring are further studied. It is worth noting that with the distinctive mechanism and structure, the special spandex fiber sensor is able to monitor minimum strain as low as 0.053%, showing tremendous prospect for the field of smart fabrics and wearable health care devices.

尽管近年来可穿戴应变传感器受到了广泛的研究兴趣，但满足超高拉伸性和高应变系数（应变系数）的要求仍然是一个巨大的挑战。在此，提出了一种可拉伸且灵活的氨纶纤维应变传感器，该传感器与碳纳米管 (CNTs)/Ag 纳米粒子 (Ag NPs) 结合，通过高效且大规模的逐层自组装进行组装。为确保碳纳米管和银纳米粒子能很好地附着在氨纶纤维上而不脱落，在大拉伸下实现高灵敏度，引入十二烷基苯磺酸钠、聚乙烯醇和聚苯乙烯磺酸，通过分子缠结和其他相互作用来提高粘合力。他们。因此，应变传感器表现出卓越的性能，如在 0% 到 20% 的低应变范围内具有 58.5 的超高应变系数、宽应变范围（0%–200%）、42 ms 的快速响应时间和良好的工作稳定性（>5000循环）。随后，进一步研究了传感器的详细机制及其在全范围人体运动监测中的应用。值得注意的是，凭借独特的机理和结构，特殊的氨纶纤维传感器能够监测低至0.053%的最小应变，在智能织物和可穿戴医疗保健设备领域显示出巨大的前景。进一步研究了传感器的详细机制及其在全范围人体运动监测中的应用。值得注意的是，凭借独特的机理和结构，特殊的氨纶纤维传感器能够监测低至0.053%的最小应变，在智能织物和可穿戴医疗保健设备领域显示出巨大的前景。进一步研究了传感器的详细机制及其在全范围人体运动监测中的应用。值得注意的是，凭借独特的机理和结构，特殊的氨纶纤维传感器能够监测低至0.053%的最小应变，在智能织物和可穿戴医疗保健设备领域显示出巨大的前景。