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Mechanical properties of PVA/GO hydrogels with different GO contents. (A) Tensile stress–strain curves. (B) Tensile fracture process of PVA hydrogel. (C) Schematic diagram of ductile fracture mechanism of PVA hydrogel. (D) Compressive stress–strain curves. (E) Tensile fracture process of PVA/GO hydrogel. (F) Schematic diagram of enhanced ductile fracture mechanism of PVA/GO hydrogel.
