Ultrathin tough double network hydrogels showing adjustable muscle-like isometric force generation triggered by solvent

Abstract

Ultrathin double-network hydrogels, which have super-high toughness under micro-scale thickness (elastic elongation ε_b > 1000%, tensile strength σ_b > 2 MPa and tearing energy G ∼ 600 J m⁻²), and solvent-triggered fast and high isometric stress generation, were synthesized by coupling the salt-controlled swelling process and polymer chain pre-reinforced technique.