Hygroscopic MXene/Protein Nanocomposite Fibers Enabling Highly Stretchable, Antifreezing, Repairable, and Degradable Skin-Like Wearable Electronics AITranslate

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DOI：https://doi.org/10.1021/acsmaterialslett.3c00397

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Wearable devices made of degradable fibers are rising stars in smart healthcare by virtue of their light weight, flexibility, and weavability. Silk protein is one promising platform for ideal fiber-type electronic devices due to its inherent biocompatibility and biodegradability. However, it remains a challenge for conductive silk-based fiber electronics to achieve high stretchability and skin-like softness. Here, hygroscopic calcium-modified MXene/silk nanocomposite fibers (Ca@MSNFs) are fabricated by decorating the wet-spun MXene/silk fibers with hygroscopic CaCl2, exhibiting 3.2 g g–1 water capture capacity at 90% relative humidity (RH), high stretchability (279.9%), degradability, repairability, and freeze-resistance (−18 °C). Furthermore, the Ca@MSNFs are assembled as humidity/strain sensors to monitor respiratory signals and body movements, showing great promise for the diagnosis of apnea syndrome and rehabilitation training. Moreover, Ca@MSNFs are degradable and do not cause pollution or environmental damage. Therefore, this work offers a promising strategy for constructing stretchable and degradable electronic devices for advanced healthcare applications.