Chen Yuanfen, Yuan Xiaoming, Li Chunlin, Ruan Ruicheng, You Hui
School of Mechanical Engineering, Guangxi University, Nanning 530004, China.
Center on Nanoenergy Research, School of Physical Science and Technology, Guangxi University, Nanning 530004, China.
Materials (Basel). 2023 May 1;16(9):3499. doi: 10.3390/ma16093499.
Electronic tattoos have great potential application in the biomedical field; moreover, the substrate-free electronic tattoo offers better comfortability and conformal contact. However, the substrate-free electronic tattoo is more prone to malfunction, including fall off and fracture. In this paper, a self-healing and self-adhesive substate-free tattoo based on PEDOT: PSS is studied and reported. The dry composite electrode will turn into self-healing material while it transforms into hydrogel, and a cut with a width up to 24 μm could be healed in 1 s. In terms of adhesion performance, the substrate-free electrode can hang a 28.2 g weight by a contact area of 8 mm × 8 mm. Additionally, the substate-free electrode could maintain fully conformal contact with porcine skin in 15 days by its self-adhesiveness. When applied as a substrate-free tattoo, the contact impedance and ECG signal measurement performance before and after self-healing are almost the same. At a frequency of 10 Hz, the contact impedance of the undamaged electrode, healed electrode, and Ag/AgCl gel electrode are 32.2 kΩ, 39.2 kΩ, and 62.9 kΩ, respectively. In addition, the ECG signals measured by the undamaged electrode and healed electrode are comparable to that of Ag/AgCl electrode. The self-healing and self-adhesive substrate-free tattoo electrode reported here has broad application in health monitoring.
电子纹身在生物医学领域具有巨大的潜在应用价值；此外，无基底电子纹身具有更好的舒适性和贴合性。然而，无基底电子纹身更容易出现故障，包括脱落和断裂。本文研究并报道了一种基于聚（3,4-乙撑二氧噻吩）：聚苯乙烯磺酸盐（PEDOT：PSS）的自愈合和自粘性无基底纹身。干燥的复合电极在转变为水凝胶时会变成自愈合材料，宽度达24μm的切口能在1秒内愈合。在粘附性能方面，无基底电极通过8mm×8mm的接触面积可悬挂28.2g的重物。此外，无基底电极凭借其自粘性可在15天内与猪皮保持完全贴合接触。当用作无基底纹身时，自愈合前后的接触阻抗和心电图信号测量性能几乎相同。在10Hz频率下，未受损电极、愈合电极和Ag/AgCl凝胶电极的接触阻抗分别为32.2kΩ、39.2kΩ和62.9kΩ。此外，未受损电极和愈合电极测得的心电图信号与Ag/AgCl电极相当。本文报道的自愈合和自粘性无基底纹身电极在健康监测方面具有广泛应用。
