Liu Chao, Wang Yuwei, Wang Shengding, Xia Xiangling, Xiao Huiyun, Liu Jinyun, Hu Siqi, Yi Xiaohui, Liu Yiwei, Wu Yuanzhao, Shang Jie, Li Run-Wei
School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, China.
CAS Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China.
Materials (Basel). 2023 Apr 14;16(8):3098. doi: 10.3390/ma16083098.
As an indispensable part of wearable devices and mechanical arms, stretchable conductors have received extensive attention in recent years. The design of a high-dynamic-stability, stretchable conductor is the key technology to ensure the normal transmission of electrical signals and electrical energy of wearable devices under large mechanical deformation, which has always been an important research topic domestically and abroad. In this paper, a stretchable conductor with a linear bunch structure is designed and prepared by combining numerical modeling and simulation with 3D printing technology. The stretchable conductor consists of a 3D-printed bunch-structured equiwall elastic insulating resin tube and internally filled free-deformable liquid metal. This conductor has a very high conductivity exceeding 10 S cm, good stretchability with an elongation at break exceeding 50%, and great tensile stability, with a relative change in resistance of only about 1% at 50% tensile strain. Finally, this paper demonstrates it as a headphone cable (transmitting electrical signals) and a mobile phone charging wire (transmitting electrical energy), which proves its good mechanical and electrical properties and shows good application potential.
作为可穿戴设备和机械臂不可或缺的一部分，可拉伸导体近年来受到了广泛关注。设计一种高动态稳定性的可拉伸导体是确保可穿戴设备在大机械变形下电信号和电能正常传输的关键技术，这一直是国内外重要的研究课题。本文结合数值建模与仿真以及3D打印技术，设计并制备了一种具有线性束状结构的可拉伸导体。该可拉伸导体由3D打印的束状结构等壁厚弹性绝缘树脂管和内部填充的可自由变形的液态金属组成。这种导体具有非常高的电导率，超过10 S/cm，良好的拉伸性，断裂伸长率超过50%，以及出色的拉伸稳定性，在50%拉伸应变下电阻相对变化仅约1%。最后，本文将其展示为耳机线（传输电信号）和手机充电线（传输电能），证明了其良好的机械和电气性能，并显示出良好的应用潜力。
