Self-Repairing and Energy-Harvesting Triboelectric Sensor for Tracking Limb Motion and Identifying Breathing Patterns

• DOI: 10.1021/acsami.3c06060
• Publication Date: 2023-06-10T02:16:06Z
• Authors: Jagan Singh Meena; Tran Duc Khanh; Seung-Boo Jung; Jong-Woong Kim
• Keywords: MXenes; Contact electrification; Mechanical energy

The increasing prevalence of health problems stemming from sedentary lifestyles and evolving workplace cultures has placed a substantial burden on healthcare systems. Consequently, remote wearable monitoring systems have emerged as essential tools to track individuals' well-being. Self-powered triboelectric nanogenerators (TENGs) exhibited significant potential for use emerging detection devices capable recognizing body movements breathing patterns. However, several challenges remain be addressed in order fulfill the requirements self-healing ability, air permeability, energy harvesting, suitable sensing materials. These materials must possess high flexibility, lightweight, excellent charging effects both electropositive electronegative layers. In this work, we investigated self-healable electrospun polybutadiene-based urethane (PBU) positive layer titanium carbide (Ti3C2Tx) MXene negative fabrication an energy-harvesting TENG device. PBU consists maleimide furfuryl components well hydrogen bonds that trigger Diels–Alder reaction, contributing its properties. Moreover, incorporates multitude carbonyl amine groups, which create dipole moments stiff flexible segments polymer. This characteristic positively influences qualities by facilitating electron transfer between contacting materials, ultimately resulting output performance. We employed device applications monitor human motion pattern recognition. soft fibrous-structured generates stable open-circuit voltage up 30 V short-circuit current 4 μA at operation frequency 4.0 Hz, demonstrating remarkable cyclic stability. A feature our is allows restoration functionality performance after sustaining damage. been achieved through utilization fibers, can repaired via simple vapor solvent method. innovative approach enables maintain optimal continue functioning effectively even multiple uses. After integration with rectifier, charge various capacitors power 120 LEDs. self-powered active sensor, attaching it purposes. Additionally, demonstrates capability recognize patterns real time, offering valuable insights into individual's respiratory health.