Abstract: To simply the preparation and enhance the properties of polyvinyl alcohol-based hydrogel, a reversible hydrogel that is tough and has high energy dissipation is prepared through one step method with natural vanillic acid and polyvinyl alcohol aqueous solution as raw materials.The morphology and structure of the hydrogel are characterized by means of FT-IR, XRD, DSCy, rotational rheometer and SEM.It is found that the prepared hydrogel possesses high crystallinity and exhibits reversible sol-gel transition.Compared with the hydrogel made by freeze-thaw method, the maximum stress and elongation-at-break of the prepared hydrogel increases from 0.52 MPa and 395% to 1.31 MPa and 600%, respectively.Its energy dissipation reaches as high as 3.8 MJ·m-3, and the dissipation factor is 85%.More importantly, the obtained hydrogel shows unique plasticity.
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