▎ 摘　　要

NOVELTY - Preparing polyvinyl alcohol-graphene oxide-polyaniline composite hydrogel comprises (i) dissolving 0.25 g polyvinol in deionized water, heating and stirring at 90℃, completely dissolving, and cooling to room temperature to obtain polyvinyl alcohol solution, (ii) adding graphene oxide solution into the polyvinyl alcohol solution, and stirring to disperse uniformly to obtain a graphene oxide and polyvinyl mixture, (iii) adding aniline monomer into the graphene oxide mixture, and uniformly stirring to disperse to obtain solution A, (iv) adding the oxidant into the deionized water, and dissolving to obtain the solution B, (v) cooling the solution A and second solution to 4℃, slowly dropping the second solution in first solution, stirring in the ice bath for 6 hours, placing for 12 hours under the condition of -30℃ and thawing at room temperature for 4 hours, freezing and thawing for a set number of times to obtain a polyvinyl alcohol-graphene oxide-polyaniline composite gel. USE - The method for preparing polyvinyl alcohol-graphene oxide-polyaniline composite hydrogel is used as adsorbent, and medicine carrier in the field of medicine treatment, biological detection. ADVANTAGE - The method provides polyvinyl alcohol-graphene oxide-polyaniline composite hydrogel with good mechanical ductility, can be bent, and the raw material cost is low, and the preparation process is simple. The method is simple, the components are effectively compounded on the substrate by simple operation, the moisture control can be realized by directional moisture stimulation, the power generation mode is environmentally-friendly, stable and sustainable, the temperature sensitivity is high, the response time is fast, does not need complex device, and has excellent compression and sensing performance.