Dual dynamic bonds enable biocompatible and tough hydrogels with fast self-recoverable, self-healable and injectable properties

•The synergistic combination of acylhydrazone bonds and H-bond cooperativity enables strong and tough hydrogels.•The hydrogels possess fast self-recovery, fatigue resistance and self-healing properties.•Injection way was allowed to obtain tough hydrogels with any desired shape.•The hydrogels have a good biocompatibility.