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Stress-strain profiles of lyophilized XG-based composite hydrogels obtained by uniaxial compression using a cross-head speed of 0.2 mm min−1 and a force of 20 N: (A) control samples; (B) composite hydrogels prepared with a weight ratio between XG and PVA of 9:1; (C) composite hydrogels prepared with a weight ratio between XG and PVA of 3:1; (D) composite hydrogels prepared with a weight ratio between XG and PVA of 1:1.
