High Strength and Toughness Polymeric Triboelectric Materials Enabled by Dense Crystal-Domain Cross-Linking

Abstract

Lightweight, easily processed, and durable polymeric materials play a crucial role in wearable sensor devices. However, achieving simultaneously high strength and toughness remains a challenge. This study addresses this by utilizing an ion-specific effect to control crystalline domains, enabling the fabrication of a polymeric triboelectric material with tunable mechanical properties. The dense crystal-domain cross-linking enhances energy dissipation, resulting in a material boasting both high tensile strength (58.0 MPa) and toughness (198.8 MJ m −3 ), alongside a remarkable 416.7% fracture elongation and 545.0 MPa modulus. Leveraging these properties, the material is successfully integrated into wearable self-powered devices, enabling real-time feedback on human joint movement. This work presents a valuable strategy for overcoming the strength-toughness trade-off in polymeric materials, paving the way for their enhanced applicability and broader use in diverse sensing applications.

Directional Moisture-Wicking Triboelectric Materials Enabled by Laplace Pressure Differences

“…The contact areas for triboelectric generation further increase, and the open circuit voltage increases accordingly to Δ V 2 . Under conditions of 1 Hz and 30 kPa, the sensors exhibited response and recovery times of 29.1 and 37.0 ms, respectively, enabling prompt stress feedback within a short time frame (Figure c). , The sensitivity of the sensor reflects the performance of the sensor. The sensitivity of the triboelectric sensor is calculated by the following eq : In eq , ΔV is the relative change of the output voltage, V 0 is the initial voltage, and P is the applied pressure.…”