highly significantP < 0.001
In all the statistical evaluations, P < 0.05 was considered significant difference, P < 0.01 was considered highly significant difference, and P < 0.001 was considered very highly significant difference. 3 Results and discussion 3.1 Preparation and characterization of PPH hydrogel Inspired by catechol-mediated mussel adhesion, we proposed a novel promising strategy for preparation of multifunctional hydrogel.