Fig. 3: Stretchability and Poisson’s ratios of the hot-pressed rGO/polymer nanocomposite elastomers.
From: Stretchable and negative-Poisson-ratio porous metamaterials
a Photographs of rGO/PPy/PUF1-UHP and rGO/PPy/PUF2-UHP upon stretching. b Photographs of rGO/PPy/PUF1-BHP upon stretching in different directions. c Photographs of rGO/PPy/PUF1-THP upon stretching in different directions. Poisson’s ratios (ν) of the elastomers were indicated in (a–c). d Stress-strain curves of the tensile tests on typical elastomers. e Stress-strain curves of the tensile tests in x direction on uniaxially hot-pressed elastomers. Inset: photographs of rGO/PPy/PUF1-UHP during the tensile test. f Stress-strain curves of rGO/PPy/PUF1-UHP for 1000 stretching-releasing cycles with 500% tensile strain in x direction. Stress-strain curves of the tensile tests on (g) rGO/PPy/PU-UHP and (h) rGO/PPy/PUF1-BHP. The inset in (g) showed photographs of rGO/PPy/PU-UHP during the tensile test. Comparison of the stretchability of our porous elastomers and the reported stretchable (i) aerogels and (j) other porous materials. k Poisson’s ratios of typical elastomers upon stretching with different tensile strains. Source data are provided as a Source Data file.
