Strong and\nStable Woody Triboelectric Materials Enabled\nby Biphase Blocking

Driven by the “Internet of Everything”\n(IoE) vision,\nthe demand for smart materials is growing. Wood, one of the most abundant\nand renewable resources, has long been a staple in construction and\nfurnishing applications. To further expand its application range,\nthis study developed a high-strength, stable wood-based triboelectric\nmaterial through a synergistic biphasic mechanism. The in situ growth\nof flame retardants and the formation of a dense char layer significantly\nenhanced the fire resistance of the wood-based triboelectric material,\nreducing the heat release rate (HRR) by 95.4% and total heat release\n(THR) by 94.2%. The dense laminate structure provided an excellent\nimpact toughness (126 kJ m<sup>–2</sup>). As a smart sensor,\nthe wood-based triboelectric material demonstrated the ability to\nrecognize human motion states and trajectories, exhibiting great potential\nfor applications in smart homes. This study provides valuable insights\nfor exploring the potential applications of wood as a smart material.