Intrinsically Strain‐Insensitive, Hyperelastic Temperature‐Sensing Fiber with Compressed Micro‐Wrinkles for Integrated Textronics,Advanced Materials Technologies

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Intrinsically Strain‐Insensitive, Hyperelastic Temperature‐Sensing Fiber with Compressed Micro‐Wrinkles for Integrated Textronics
Advanced Materials Technologies ( IF 6.4 ) Pub Date : 2020-03-20 , DOI: 10.1002/admt.202000073
Jihyun Lee _{1,

2} , Da Wan Kim ₂ , Sungwoo Chun ₁ , Jin Ho Song ₁ , Eui Sang Yoo ₃ , Jung Kyu Kim ₂ , Changhyun Pang _{1,

2}

Affiliation

Fiber‐shaped sensors are useful for the simple fabrication of textile‐based electronics, which have excellent wearability and conformal adaptability for ubiquitous healthcare systems. In the case of temperature monitoring using highly deformable textronics for diagnostics, the device operation can be hindered by strain‐induced interferences when various movements are performed. An intrinsic strain‐insensitive fiber‐type temperature sensor with compressed micro‐wrinkles is demonstrated. The fiber sensor exhibits remarkable sensitivity (≈0.93% °C^‐1) and high strain insensitivity until 60% tensile strain. Once the sensor is regularly knitted into a soft fabric, negligible changes in the electrical resistance are observed up to 180% tensile strain. Temperature‐responsive wavy architectures on the fiber surface are fabricated via a facile dip‐coating method after applying a pre‐strain, followed by lamination of an elastic protective layer. By fabricating uniform microscale wavy architectures and adjusting the wavelength of the micro‐wrinkles, the device performance is significantly improved. The fiber temperature sensor demonstrated is highly repeatable and reproducible for <1000 cycles, exhibiting excellent cyclic responses to on/off switching. Additionally, the fiber sensor can be integrated into a smart glove with a wireless transmitter to monitor continuous changes of the outside temperature without deformation‐induced interference under numerous dynamic gestures and movements.

中文翻译：

本征应变不敏感，具有压缩微皱纹的超弹性温度传感纤维，用于集成纺织

纤维状传感器可用于简单地制造基于纺织品的电子产品，这些电子产品具有出色的耐磨性和适形的适应性，适用于无处不在的医疗保健系统。在使用高度变形的文本记录器进行温度监控以进行诊断的情况下，执行各种运动时，设备会受到应变引起的干扰的阻碍。演示了具有压缩微皱纹的固有应变不敏感光纤型温度传感器。光纤传感器具有出色的灵敏度（≈0.93％°C ^-1）和高应变不敏感性，直到60％拉伸应变。一旦将传感器定期编织到柔软的织物中，在高达180％的拉伸应变下，观察到的电阻变化可忽略不计。纤维表面上的温度响应性波浪形结构是在施加预应变后通过简便的浸涂方法制造的，然后层压弹性保护层。通过制造均匀的微米级波浪状结构并调整微皱纹的波长，可以显着提高设备性能。所展示的光纤温度传感器在<1000个循环中具有很高的可重复性和可重现性，对开/关切换表现出出色的循环响应。另外，

更新日期：2020-03-20

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