Stretchable conductive fibers are essential for smart electronic textiles (E-textiles). Here, we develop a continuous dry-wet spinning approach to fabricate stretchable, conductive and self-healing hydrogel fibers. By tuning the contents of acrylamide (AAm) and N-acryloylglycinamide (NAGA), the physically cross-linked poly (NAGA-co-AAm) (PNA) hydrogel precursor exhibits thermally reversible sol-gel transition, which ensures the success of the spinning process. The obtained PNA hydrogel fiber achieves excellent tensile strength (2.27 Mpa), stretchability (900%), high conductivity (0.69 S m⁻¹), and self-healing capability. With an elastomeric poly (methyl acrylate) (PMA) coating, the PNA/PMA core-sheath fiber shows excellent resistance to water evaporation and absorption. The strain sensing capability of the PNA/PMA fiber is demonstrated for monitoring human body motions. Furthermore, a triboelectric nanogenerator (TENG) textile woven from the PNA/PMA fibers is fabricated to convert mechanical motion energy into electric power. Our stretchable conductive hydrogel fibers suggest great potentials for next-generation multifunctional smart textiles and wearable electronics.

可拉伸的导电纤维对于智能电子纺织品（电子纺织）至关重要。在这里，我们开发了一种连续的干湿纺丝方法来制造可拉伸，导电和自修复的水凝胶纤维。通过调节丙烯酰胺（AAm）和N-丙烯酰基甘氨酰胺（NAGA）的含量，物理交联的聚（NAGA- co -AAm）（PNA）水凝胶前体表现出热可逆的溶胶-凝胶转变，从而确保纺丝成功处理。所得的PNA水凝胶纤维具有优异的拉伸强度（2.27Mpa），拉伸性（900％），高导电性（0.69S m ^-1）。）和自我修复功能。PNA / PMA芯鞘纤维具有弹性体聚丙烯酸甲酯（PMA）涂层，对水的蒸发和吸收具有出色的抵抗力。演示了PNA / PMA光纤的应变传感功能，可监测人体运动。此外，制造了由PNA / PMA纤维织造的摩擦电纳米发电机（TENG）纺织品，以将机械运动能转化为电能。我们的可拉伸导电水凝胶纤维为下一代多功能智能纺织品和可穿戴电子产品提供了巨大潜力。