Multi-stimuli- responsive mechanical strong stretchable hydrogel has grabbed extensive attention in recent years. Here, a novel stretchable conductive biocompatible near-infrared light(NIR)-/thermal-/pH-/ionic concentration- responsive carboxymethyl chitosan (CMCTs)/graphene oxide (GO)/poly(N-isopropylacrylamide)(PNIPAm) nanocomposite double network hydrogel was fabricated through a simple one-pot in situ free radical polymerization, which is initiated by ultraviolet (UV) light and using N-(3-dimethylaminopropyl)-N-ethylcarbodiimidehydrochloride (EDC) and N,N’-bis(acryloyl)cystamine (BAC) as cross-linkers respectively, instead of toxic organic molecules. When the concentration of CMCTs, GO, EDC and BAC is 22.50, 0.103, 7.50 and 0.467 mg/mL respectively, the obtained hydrogel sample owns the highest tensile strength of 1046 kPa at failure strain of 1286% and a corresponding compressive stress of 2.37 MPa at deformation of 90%. Besides, these hydrogels have an obvious pH-/thermal-/ionic concentration-responsive properties depending on the concentration of the above mentioned factors, and their good conductive property makes them as candidate material for healthcare biosensors. Finally, we attempt to design a novel thermal-/NIR-responsive double network structure bilayer hydrogel, which has the potential use as remote actuator in dangerous places in the future.

近年来，多刺激响应机械强可拉伸水凝胶引起了广泛关注。在这里，一种新型的可拉伸导电生物相容性近红外光（NIR）-/热-/pH-/离子浓度响应羧甲基壳聚糖（CMCT）/氧化石墨烯（GO）/聚（N-异丙基丙烯酰胺）（PNIPAm）纳米复合双网络水凝胶是通过简单的一锅原位制造的自由基聚合，由紫外 (UV) 光引发，分别使用 N-(3-二甲基氨基丙基)-N-乙基碳二亚胺盐酸盐 (EDC) 和 N,N'-双(丙烯酰基)胱胺 (BAC) 作为交联剂，而不是有毒有机分子。当CMCTs、GO、EDC和BAC的浓度分别为22.50、0.103、7.50和0.467 mg/mL时，所得水凝胶样品在1286%的破坏应变下具有1046 kPa的最高拉伸强度和2.37 MPa的相应压应力变形90%。此外，这些水凝胶具有明显的pH-/热-/离子浓度响应特性，取决于上述因素的浓度，它们良好的导电性能使其成为医疗生物传感器的候选材料。最后，