Zhu Liming, Zhou Xinran, Zhang Jiwei, Xia Yong, Wu Mengjie, Zhang Yue, Lu Zeren, Li Weikang, Liu Luyun, Liu Hao, Yu Jianyong, Xiong Jiaqing
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Textiles, Donghua University, Shanghai 201620, China.
Innovation Center for Textile Science and Technology, Donghua University, Shanghai 201620, China.
ACS Nano. 2024 Dec 24;18(51):34750-34762. doi: 10.1021/acsnano.4c11291. Epub 2024 Dec 13.
Elastic conductive ink (ECI) can effectively balance the electromechanical properties of printed flexible electronics. It remains challenging to realize ECIs for direct printing on deformable porous substrates with complex textures, such as textiles, to form continuous and stable electrical paths. We engineered a self-adhesive ECI with high permeability and low diffusivity, achieving efficient electrode printing on a wide range of textiles with material and structure diversity. The ECI consists of a microphase separation-toughened elastomer (styrene-isoprene-styrene/ethyl vinyl acetate (SIS-EVA)) and a binary conductive filler. SIS-EVA provides a tough framework to protect silver flakes (AgFKs) and forms a ductile conductive path, which can be electrically compensated by liquid metal microspheres (LMMSs) upon dynamic deformation. The freestanding ECI conductor demonstrates a breaking strain of ∼1305.5% and a conductivity of ∼5322.7 S cm. The ECI can be universally printed on diversified textiles free of pretreatment, with high permeability (319.2 μm) and low diffusivity (6.2 μm), demonstrating a stable printing line width of ∼216 μm on knitted cotton textiles, while maintaining electrical stability after 200 stretching cycles with 50% strain. Printed electronic textiles with stretchability, high abrasion resistance, and machine washability are demonstrated for wearable applications such as fabric electrodes, capacitive sensors, and electrocardiograph monitoring.
弹性导电油墨（ECI）能够有效平衡印刷柔性电子产品的机电性能。要实现可直接印刷在具有复杂纹理的可变形多孔基材（如纺织品）上以形成连续且稳定的电路径的ECI仍然具有挑战性。我们设计了一种具有高渗透性和低扩散性的自粘性ECI，从而能够在各种具有材料和结构多样性的纺织品上高效印刷电极。该ECI由微相分离增韧弹性体（苯乙烯-异戊二烯-苯乙烯/乙烯-醋酸乙烯酯（SIS-EVA））和二元导电填料组成。SIS-EVA提供了一个坚韧的框架来保护银片（AgFKs）并形成可延展的导电路径，在动态变形时，液态金属微球（LMMSs）可对其进行电补偿。独立的ECI导体的断裂应变约为1305.5%，电导率约为5322.7 S/cm。该ECI无需预处理即可普遍印刷在各种纺织品上，具有高渗透性（319.2μm）和低扩散性（6.2μm），在针织棉纺织品上的印刷线宽约为216μm且保持稳定，在50%应变下经过200次拉伸循环后仍保持电稳定性。具有拉伸性、高耐磨性和可机洗性的印刷电子纺织品被展示用于诸如织物电极、电容式传感器和心电图监测等可穿戴应用。
