Deyan Du,Tatsuo Kaneko,Weifu Dong,Mingqing Chen,Dongjian Shi
Stretchable eutectogel fibers hold exceptional promise for human physiological monitoring wearable electronics due to their nonvolatility, high ionic conductivity, and cost-effective fabrication. However, a significant challenge remains in achieving sufficient mechanical properties of eutectogel fibers for textile manufacturing and the ability to withstand long-term real-life usage, such as sweating and washing. Herein, hydrophobic eutectogel fibers (HEFs) with exceptional mechanical strength and environmental resilience were prepared via integrating prestretching and solvent evaporation-induced crystallization processes. The formation of abundant hydrogen bonds and the crystallization domain impart the HEFs with excellent tensile strength (5.5–22.5 MPa) and adjustable stretchability (75–375%). Most importantly, the HEF fibers keep remarkable stability (weight changes <2%) in aquatic environments under varying conditions of pH, humidity, detergent, and temperature. The HEF demonstrated multimodal sensing capabilities, including motion, weight, and temperature detection, with high-precision sensation (gauge factor = 2.2; temperature coefficient of resistance = 4.83 ± 0.2% K–1) and stability. These advancements set a foundation for smart wearable devices, marking a significant progress in the fields of eutectogel-based intelligent health monitoring.
The concept of biomimetic spinning has shown great promise to provide precision control over the hierarchical morphology of polymer nanofibers, endowing the nanofibrous membranes (NFMs) with multifunction integration like high porosity and surface activity. Here, we attempted to construct the plant-mimicking features in ecofriendly poly(lactic acid) (PLA) nanofibers by coaxial electrospinning, permitting well-controlled generation of MOF-protruding micro-bulges (10, 20 and 30 wt%) secreted in the refined PLA nanofibers. The unique biomimicking architecture was hypothesized to impart dielectric and electret properties, giving rise to significant fiber refinement and long-term electrostatic adsorption for the bioinspired PLA (B-PLA) nanofibers. The PM-capturing mechanisms could be further enhanced by ultrahigh surface activity, as exemplified by ultrahigh removal efficiencies (over 99.7 % and 99.3 %) for both PM 0.3 and PM 2.5 in the broad-range airflow rates (10–85 L/min), while providing well-controlled air resistance. Moreover, the B-PLA NFMs were examined to efficiently remove oily PMs (over 94.4 % for PM 0.3 and 95.3 % for PM 2.5 ), far surpassing normal PLA counterpart (only 61.4 % and 72.0 %, respectively). Sustainable respiration-driven charge regeneration was demonstrated for the electroactive B-PLA NFMs, allowing real-time respiratory monitoring and AI-assisted high-accuracy diagnosis (as high as 97.1 %). The proposed bioinspired electrospinning strategy can provide a versatile platform that integrates with structure-by-bionics concept and useful property improvements for engineering multifunctional protective membranes.
危险品化学品经营许可证（带存储）