▎ 摘　　要

NOVELTY - Method for preparing conductive organic hydrogel, involves (i) dispersing cellulose nanocrystals in ultrapure water until completely dissolved, adding tannic acid to ultrapure water dissolved in the cellulose nanocrystals, and continuously stirring to obtain cellulose nanocrystals wrapped in tannic acid solution, (ii) dispersing sodium lauryl sulfate and graphene in ultrapure water, continuously stirring and ultrasonically treating the mixture to disperse the mixture to obtain a graphene dispersion, (iii) mixing the cellulose nanocrystal solution wrapped with tannic acid and the graphene dispersion, adding polyacrylamide and borax pentahydrate to the mixed solution, and continuously adding initiator, crosslinking agent and catalyst to obtain a hydrogel precursor through free radical polymerization, and (iv) completely drying the hydrogel precursor, and introducing an organic solvent ethylene glycol to the dried hydrogel precursor by solvent replacement to prepare the hydrogel. USE - The method is used for preparing conductive organic hydrogel for flexible wearable sensor (claimed), developing flexible electronic device for human body movement and health detection, wearable electronic, electronic skin and man-machine interaction. ADVANTAGE - The conductive organic hydrogel has excellent anti-freezing ability, anti-water loss ability, excellent self-healing ability, strong and stable adhering ability corresponding to the surface of different base materials, and excellent mechanical and electrical properties, and can keep more than 80% of the original weight even at normal temperature for 60 days at -30℃, after storing for a certain time (e.g. 72 hours) at room temperature. The wearable sensor has long-term stable use and environment-resistant performance, and is capable of effectively reducing the response loss, and avoiding the signal distortion caused by the separation of the hydrogels and the base material in the long term use process. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a hydrogel prepared by the above method.