Fig. 1 | Nature Communications

Fig. 1

From: A supramolecular biomimetic skin combining a wide spectrum of mechanical properties and multiple sensory capabilities

Fig. 1

Confirmation of multiple dynamic interactions in the supramolecular networks. a The chemical structure of the polyelectrolyte (PAA-co-DMAPS) synthesized in this work. b ATR-FTIR spectra (in the regions of 1800–1000 cm−1) of the freeze-dried PAA-co-DMAPS copolymer and the supramolecular polyelectrolyte hydrogels equilibrated in D2O with different NaCl concentrations and their corresponding second derivative curves. c Hydrodynamic diameters of the freeze-dried PAA-co-DMAPS copolymer in aqueous solutions (0.1 wt%) with different NaCl concentrations (0, 0.1, 0.5, and 1 M). The inset photo shows precipitates are observed in 1 M NaCl. d A photo of the PAA-co-DMAPS copolymer equilibrated in aqueous solutions (0.1 wt%) with different NaCl concentrations. e Swelling volume ratios of the polyelectrolyte hydrogels equilibrated in NaCl aqueous solutions with different concentrations. (error bars: standard deviations). f A corresponding photo of the hydrogels in e

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