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The mechanical properties of the DN hydrogel. (A) Compression, (B) stretching, (C) twisting–stretching, and (D) crossing–stretching. (E) Load-bearing ability (loading weight: 1 kg). SEM images of (F) the composite hydrogel and (G) the DN hydrogel. (H) Compressive and (I) tensile curves of the composite and DN hydrogels.
