3D Printing Flexible Wearable Electronics with Diversified Environmentally Adaptive for Biomechanical Energy Harvesting and Personal Electromagnetic Safety

Abstract The exploitation of wearable electronic devices with diversified environmentally adaptivity, advanced additive manufacturing, efficient microwaves absorption, and self‐powered sensing represents a pivotal strategic in promoting Artificial‐Intelligence and personal electromagnetic safety. However, achieving robust multifunctional integration in a single flexible device is still an unprecedented challenge. Herein, the multidimensional and multiphase nanofiller with hierarchical structures and tailored defects, and comb/bottlebrush polysiloxane with multifluorination and multireversible bond, featuring dynamic interface interaction, are designeded. Subsequently, a dual‐mode intelligent wearable sensor is assembled based on direct‐ink‐writing and electrostatic‐spraying technology. The 3D‐printed triboelectric nanogenerator (TENG) exhibited excellent triboelectric output ( V _oc = 185.4 V, I _sc = 1576.2nA, power density = 729.8mW m ⁻² ) and durability in virtue of multi‐scale roughness surface, interfacial polarization, efficient charge trapping, storage and transmission capacity. Accordingly, the fabric‐based TENG is designed for demonstrating self‐powered human activity monitoring and biomechanical energy harvesting. Benefiting from optimized impedance matching and multiple magnetic‐dielectric coupling, the device exhibited exceptional personal electromagnetic protection behavior ( RL _min = ‐64.81 dB, EAB = 5.1 GHz). Remarkably, the synergistic properties of superhydrophobic, oleophobic, and self‐healing significantly improved reliability and life‐span. This work presents as a proof‐of‐concept for an intelligent wearable device with extensive design‐freedom, pioneering the integration of self‐powered sensing, electromagnetic safety, and environmentally adaptivity, which will contribute to the development of high‐quality human‐machine interaction, wearable healthcare, and electronic skin.