To overcome the status quo of fragile network and single function in the single-network hydrogel, this work designed and fabricated a dual-network O-CMCS (O-carboxymethyl chitosan)/PVA (polyvinyl alcohol) PBOC conductive hydrogel based on two kinds of totally dynamic reversible cross-linking networks. The PBOC conductive hydrogel combined a flexible O-PT (oxidized pectin)/O-CMCS network with a rigid PVA-borax network, and CNTs (carbon nanotubes) were introduced to improve its toughness and conductivity. Its structural characteristics were investigated through Fourier transform infrared spectroscopy (FT-IR), scanning electron microscope (SEM), X-ray diffractometer (XRD), nuclear magnetic resonance (NMR) and other techniques. Its superb and rapid self-healing property was confirmed through dynamic rheological tests, and its electrical property was studied through an electrochemical workstation. The co-existence of the dual networks endowed the PBOC conductive hydrogel with excellent stretchable property (821% of the maximum elongation at break), and it could quickly self-heal within 60 s after being cut due to the intense interaction of totally reversible multiple dynamic bonding. Notably, the PBOC conductive hydrogel strain sensor exhibited high strain sensitivity with GF (gauge factor) of 8.44 at 800% strain and could accurately detect all kinds of human motions (e.g. finger bending, wrist bending and elbow bending, etc.), confirming its tremendous application potential in the field of wearable sensor devices.

为了克服单网络水凝胶中网络脆弱和功能单一的现状，本工作设计并制造了双网络 O-CMCS ( O-羧甲基壳聚糖）/PVA（聚乙烯醇）PBOC导电水凝胶基于两种全动态可逆交联网络。PBOC 导电水凝胶将柔性 O-PT（氧化果胶）/O-CMCS 网络与刚性 PVA-硼砂网络相结合，并引入 CNT（碳纳米管）以提高其韧性和导电性。通过傅里叶变换红外光谱（FT-IR）、扫描电子显微镜（SEM）、X射线衍射仪（XRD）、核磁共振（NMR）等技术对其结构特征进行了研究。通过动态流变测试证实了其卓越快速的自愈性能，并通过电化学工作站研究了其电性能。 由于完全可逆多重动态键合的强烈相互作用而被切割后的 s。值得注意的是，PBOC 导电水凝胶应变传感器在 800% 应变下表现出 GF（应变系数）为 8.44 的高应变灵敏度，可以准确检测各种人体运动（例如手指弯曲、腕部弯曲和肘部弯曲等），证实了其在可穿戴传感器设备领域具有巨大的应用潜力。