▎ 摘　　要

Inspired by using the condensed tannins as coinitiator and crosslinker to prepare stretchable hydrogel (TIC-gel) and by tannins' ability to prepare tannins-reduced graphene oxide (TGO) at 80 degrees C, this paper designs a simple and effective method with a thermal treatment process for the mixture of tannin and graphene oxide (GO) to prepare super extensible TGO composite TIC-gel (TGO-gel). After the thermal treatment process, graphene oxide is reduced by tannin and its surface becomes orderly which leads to strong p-p stacking interaction between tannins and graphene sheets. By this way, the interaction between graphene sheets and polymer chains is improved. As a result, these composite hydrogels have high tensile strength (0.5-1.2 MPa) and extremely high elongations (3100-4800%) which are much higher than those of GO composites TIC-gel (TA/GO-gel) without thermal-treated process and those of normal graphene composite hydrogel.