Scaling Metal-Elastomer Composites toward Stretchable Multi-Helical Conductive Paths for Robust Responsive Wearable Health Devices,Advanced Healthcare Materials

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Scaling Metal-Elastomer Composites toward Stretchable Multi-Helical Conductive Paths for Robust Responsive Wearable Health Devices
Advanced Healthcare Materials ( IF 10.0 ) Pub Date : 2021-07-17 , DOI: 10.1002/adhm.202100221
Yue Zhao _{1,

2} , Yu Jun Tan ₃ , Weidong Yang ₃ , Shaohua Ling ₃ , Zijie Yang ₃ , Ju Teng Teo ₃ , Hian Hian See ₃ , David Kwok Hung Lee ₃ , Dingjie Lu ₄ , Shihao Li ₃ , Xianting Zeng ₂ , Zhuangjian Liu ₄ , Benjamin C K Tee _{1,

3,

5}

Affiliation

Stretchable electronics have advanced rapidly and many applications require high repeatability and robustness under various mechanical deformations. It has been described here that how a highly stretchable and reliable conductor composite made from helical copper wires and a soft elastomer, named eHelix, can provide mechanically robust and strain-insensitive electronic conductivity for wearable devices. The reversibility of the mechanical behavior of the metal-elastomer system has been studied using finite element modeling methods. Optimal design parameters of such helical metal-elastomer structures are found. The scaling of multiple copper wires into such helical shapes to form a Multi-eHelix system is further shown. With the same elastomer volume, Multi-eHelix has more conductive paths and a higher current density than the single-eHelix. Integrations of these eHelix stretchable conductors with fabrics showed wearable displays that can survive machine-washes and hundreds of mechanical loading cycles. The integration of the eHelix developed by us with a wearable optical heart rate sensor enabled a wearable health monitoring system that can display measured heart rates on clothing. Furthermore, Multi-eHelix conductors are used to connect flexible printed circuit boards and piezoresistive sensors on a tactile sensing glove for the emerging sensorized prosthetics.

中文翻译：

将金属-弹性体复合材料向可拉伸的多螺旋导电路径扩展，用于鲁棒的响应式可穿戴健康设备

可拉伸电子产品发展迅速，许多应用需要在各种机械变形下具有高重复性和鲁棒性。这里已经描述了由螺旋铜线和软弹性体制成的高度可拉伸和可靠的导体复合材料，称为 eHelix，可以为可穿戴设备提供机械坚固和应变不敏感的电子导电性。已经使用有限元建模方法研究了金属-弹性体系统机械行为的可逆性。找到了这种螺旋金属弹性体结构的最佳设计参数。进一步显示了将多根铜线按比例缩放成这种螺旋形状以形成 Multi-eHelix 系统。在弹性体体积相同的情况下，Multi-eHelix 比单 eHelix 具有更多的导电路径和更高的电流密度。这些 eHelix 可拉伸导体与织物的集成展示了可穿戴显示器，可以经受机洗和数百次机械加载循环。我们开发的 eHelix 与可穿戴光学心率传感器的集成使可穿戴健康监测系统能够在衣服上显示测量的心率。此外，Multi-eHelix 导体用于连接柔性印刷电路板和触觉传感手套上的压阻传感器，用于新兴的传感假肢。我们开发的 eHelix 与可穿戴光学心率传感器的集成使可穿戴健康监测系统能够在衣服上显示测量的心率。此外，Multi-eHelix 导体用于连接柔性印刷电路板和触觉传感手套上的压阻传感器，用于新兴的传感假肢。我们开发的 eHelix 与可穿戴光学心率传感器的集成使可穿戴健康监测系统能够在衣服上显示测量的心率。此外，Multi-eHelix 导体用于连接柔性印刷电路板和触觉传感手套上的压阻传感器，用于新兴的传感假肢。

更新日期：2021-09-08

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