The printed electronic technology, a simple, low‐cost, and high‐throughput method, exhibits great potential applications in various fields, particularly in intelligent and tamper‐evident packaging. In this study, an all‐printed flexible sensor is prepared for sensing tamper‐evident packaging by screen printing the water‐based silver nanowires (Ag NWs) conductive ink onto a polyethylene terephthalate substrate. This bendable sensor shows a corresponding variation relationship between the resistance of the Ag NWs layer and bending angles. In addition, it presents a stable resistance sensitivity at the bending angles of 45°, 90°, and 135°. The mechanisms of different printed structures on the sensitivity of the sensor have been discussed. The results show that the straight‐line sensor with a linewidth of 2.0 mm has the best sensitive performance (the gauge factors at bending angles of 45°, 90°, and 135° are 37.1, 39.3, and 39, respectively). Moreover, the sensor exhibits a long‐term mechanical cyclic stability (no apparent decay after 1000 bending cycles) and excellent adhesion performance (no distinct increase in resistance after 20 times). Because of the excellent sensing performance, the Ag NWs‐based flexible sensor can accurately detect the opening status of the packaging, showing promising potential for practical tamper‐evident applications.

中文翻译：

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具有银纳米线的丝网印刷柔性应变传感器，用于智能和防篡改包装应用

印刷电子技术是一种简单，低成本，高通量的方法，在各个领域都有着巨大的潜在应用，特别是在智能和防篡改包装中。在本研究中，通过将水性银纳米线（Ag NWs）导电油墨丝网印刷到聚对苯二甲酸乙二酯基材上，准备了一种全印制柔性传感器，用于感测篡改包装。该可弯曲传感器示出了Ag NWs层的电阻与弯曲角度之间的对应变化关系。此外，它在45°，90°和135°的弯曲角度下表现出稳定的电阻灵敏度。讨论了不同印刷结构对传感器灵敏度的影响机理。结果表明，直线传感器的线宽为2。0 mm具有最佳的感光性能（弯曲角度为45°，90°和135°时的规格系数分别为37.1、39.3和39）。此外，该传感器具有长期的机械循环稳定性（在1000次弯曲循环后无明显衰减）和出色的粘合性能（在20倍后电阻没有明显增加）。由于具有出色的感测性能，基于Ag NWs的柔性传感器可以准确检测包装的打开状态，在实际的防篡改应用中显示出有希望的潜力。