Fig. 3
From: Adjacent cationic–aromatic sequences yield strong electrostatic adhesion of hydrogels in seawater
Mechanical properties of poly(cation-adj-π) gels. a The digital photo of a P(ATAC-adj-PEA)-0.1 hydrogel with a size of 235 mm × 235 mm × 6 mm. b Rheological behaviors of physical poly(cation-adj-π) gels in 0.7 M NaCl. c Tensile stress–strain curves of physical poly(cation-adj-π) gels in 0.7 M NaCl. d Tensile stress–strain curves of P(ATAC-adj-PEA) gels with different amounts of chemical crosslinkers. e Hysteresis and self-recovery of the physical P(ATAC-adj-PEA) gel and 0.1 mol% chemically crosslinked P(ATAC-adj-PEA)-0.1 gel measured by cyclic tensile tests. The initial strain rate of tensile tests was 0.14 s−1. The numbers in d and e are the chemical crosslinkers in mol% relative to monomers. f Rheological behaviors of physical P(ATAC-adj-PEA) gels in 0.7 M different alkali solutions
