3D Printable flexible electrochemical sensors with carbon-polymer composite electrodes
Y. Zhang (TU Delft - Mechanical Engineering)
J.G. Buijnsters – Mentor (TU Delft - Micro and Nano Engineering)
Mohamed A. Basyooni-M.Kabatas – Mentor (TU Delft - Dynamics of Micro and Nano Systems)
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Abstract
With the development of sensor miniaturization and intelligence, the application of flexible electrochemical sensors in health monitoring and drug testing is gradually emerging. The current research focuses on the electrode application of conductive nanomaterials, and carbon-based composites are increasingly widely used in the field of flexible sensors due to their excellent conductivity and flexibility. Among them, boron-doped diamond (BDD) has attracted much attention due to its excellent electrochemical properties and corrosion resistance, making it an ideal electrode material for integration in flexible sensors. The combination of 3D printing technology, especially fused deposition modeling (FDM), provides a new path for flexible electrode manufacturing with high efficiency and low cost.
In this study, we explored the FDM printing performance of TPU/CNT/BDD and TPU/CB composites and their potential as flexible electrodes. The results show that TPU/CNT/BDD printing is difficult and the resistance increases after printing. In contrast, the printing process of TPU/CB material is simple, repeatable, and maintains excellent structural stability and conductivity under mechanical stretching. In electrochemical tests, DMSO treatment can significantly improve the conductivity and redox activity of TPU/CB electrodes, indicating that this strategy has broad prospects for applications such as flexible electronic devices, wearable sensors and energy storage devices.