Fabrication of Poly(acrylic acid)/Boron Nitride Composite Hydrogels with Excellent Mechanical Properties and Rapid Self-Healing Through Hierarchically Physical Interactions.

ABSTRACT: Many living tissues possess excellent mechanical properties and self-healing ability. To mimic these living tissues, a series of novel composite hydrogels, poly(acrylic acid)/surface-modified boron nitride nanosheets (PAA/BNNS-NH₂) were fabricated simply through hierarchically physical interactions: molecular-scale metal coordination interaction between -COOH of PAA and Fe³⁺ and nanoscale H-bond between -COOH of PAA and -NH₂ of BNNS-NH₂. The composite hydrogels exhibit both excellent mechanical properties (including enhanced fracture stress, elongation, toughness, Young's modulus, and dissipated energy) and rapid healing ability without any external stimulus. Especially, the B_0.5P₇₀ (the hydrogel with BNNS concentration of 0

SUBMITTER: Xue S 

PROVIDER: S-EPMC6281544 | biostudies-literature | 2018 Dec

REPOSITORIES: biostudies-literature