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<p>Wearable sensors have attracted increasing attention for health monitoring, motion analysis, and injury-prevention applications. In this work, a poly(butylene adipate-co-terephthalate)/poly(butylene succinate) (PBAT/PBS) composite film compatibilized with melanin-like nanoparticles (MNPs) is developed as an efficient triboelectric layer for constructing a high performance PP-TENG. The introduction of MNPs enhances phase compatibility and interfacial adhesion within the PBAT/PBS matrix, enabling stable deformation and effective charge generation. The resulting PP-TENG delivers excellent electrical performance, achieving an open-circuit voltage (V<sub>OC</sub>) of 413.8&#xa0;V, a short-circuit current (I<sub>SC</sub>) of 35.7 μA, a maximum transferred charge (Q<sub>SC</sub>) of 91.4 nC, and a peak output power of 1.4 mW. Owing to its high mechanical sensitivity, the device accurately captures variations in bending angle, gait rhythm, and locomotion state. Moreover, it can differentiate normal from injury-mimicking gait patterns, demonstrating strong potential for self-powered motion monitoring, sports injury assessment, and wearable healthcare systems.</p>

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A high-performance triboelectric composite film for autonomous joint motion tracking and injury-mimicking gait analysis

  • 期刊论文

  • 发表日期：

    2026年7月13日

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  • Xiaoqian Wang,
  • Keren Pang

摘要

Wearable sensors have attracted increasing attention for health monitoring, motion analysis, and injury-prevention applications. In this work, a poly(butylene adipate-co-terephthalate)/poly(butylene succinate) (PBAT/PBS) composite film compatibilized with melanin-like nanoparticles (MNPs) is developed as an efficient triboelectric layer for constructing a high performance PP-TENG. The introduction of MNPs enhances phase compatibility and interfacial adhesion within the PBAT/PBS matrix, enabling stable deformation and effective charge generation. The resulting PP-TENG delivers excellent electrical performance, achieving an open-circuit voltage (VOC) of 413.8 V, a short-circuit current (ISC) of 35.7 μA, a maximum transferred charge (QSC) of 91.4 nC, and a peak output power of 1.4 mW. Owing to its high mechanical sensitivity, the device accurately captures variations in bending angle, gait rhythm, and locomotion state. Moreover, it can differentiate normal from injury-mimicking gait patterns, demonstrating strong potential for self-powered motion monitoring, sports injury assessment, and wearable healthcare systems.