Hierarchically aligned heterogeneous core-sheath hydrogels

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. Furthermore, such a tough and strong hydrogel facilely achieves stable regeneration and rapid adhesion owing to the highly crystallized and aligned network structure. The regenerated specimen presents the reinforced strength, toughness and fatigue resistance over 10 regeneration cycles. This work provides a simple method to produce hydrogels with bioinspired heterostructures and combinational properties for real applications.