针对聚乙烯醇水凝胶制备复杂及综合性能不佳等问题，以天然香草酸和聚乙烯醇为原料，利用简单的一步混合法制备了强韧、高耗散的可逆水凝胶。通过FT-IR、XRD、DSC、旋转流变仪和SEM对所得水凝胶的形貌结构及性能进行表征。结果表明，制得的水凝胶具有较高的结晶度，能够发生可逆的溶胶-凝胶转变。相对于冻融法制备的水凝胶，其最大应力以及断裂伸长率分别从0.52 MPa、395%提升到1.31 MPa、600%，其能量耗散高达3.8 MJ/m³、耗散系数为85%，且拥有独特的可塑性。

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.

董闯(1994-),男,硕士生,主要从事高分子水凝胶材料的研究,1392825980@qq.com