Natural wood with the merits of hierarchical structure and renewable has gained increasing attentions in sustainable electrical device. However, the development of functionalized wood integrating excellent mechanical robustness and conductivity for electronics remains ongoing challenge. Herein, a novel strategy of polymerizable deep eutectic solvents (PDES) treated modified-wood was developed for the preparation of multi-functionalized wood for high-performance self-powered sensors. In this strategy, the methacrylic anhydride-modified wood simultaneously containing methyl groups and acrylate groups was first prepared, and then employed to react with PDES to construct the covalent-noncovalent dual crosslinked functionalized wood (FW). The in-situ polymerization of PDES with modified-wood not only achieved the excellent mechanical toughness (2.37 MJ/m3), optical transmittance (86 %) and conductivity (34.48 mS/m) but also endowed the FW with outstanding antibacterial performance. Given these features, the FW was applied as electrode materials for assembling flexible and high-performance wood-based TENG (FW-TENG). More impressively, the introduction of the electron-donating group (-CH3) improved the polarity of the FW, which significantly increased the transferred charge density of FW-TENG about 2.91 times. And the FW-TENG showed the promising applications in human motions monitoring and information encrypting. This work paved a new strategy for developing the multi-functionalized wood-based materials for self-powered electronics.

中文翻译：

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具有可调机械韧性、透明性和导电性的功能化木材，用于多功能自供电传感器


天然木材具有分层结构和可再生的优点，在可持续电气设备中受到越来越多的关注。然而，开发兼具优异的机械强度和电子导电性的功能化木材仍然是一个持续的挑战。在此，开发了一种可聚合低共熔溶剂（PDES）处理的改性木材的新策略，用于制备用于高性能自供电传感器的多功能木材。该策略首先制备同时含有甲基和丙烯酸酯基团的甲基丙烯酸酐改性木材，然后与PDES反应构建共价-非共价双交联功能化木材（FW）。 PDES与改性木材的原位聚合不仅实现了优异的机械韧性（2.37 MJ/m3）、透光率（86%）和电导率（34.48 mS/m），而且赋予了FW优异的抗菌性能。鉴于这些特点，FW被用作电极材料来组装柔性高性能木质TENG（FW-TENG）。更令人印象深刻的是，给电子基团（-CH3）的引入改善了FW的极性，使FW-TENG的转移电荷密度显着提高了约2.91倍。 FW-TENG在人体运动监测和信息加密方面展示了良好的应用前景。这项工作为开发用于自供电电子产品的多功能木质材料奠定了新的战略。