Credit: F. Wu
Figure (a) shows the synthesis strategy for 3-D PPy; (b) is a digital photo of pyrrole in EtOH/H2O (1:1) solution (left) and PPy hydrogel (right); (c, d) show that a dry 3-D PPy can recover its initial shape after pressing; (e-g) FE-SEM images of 3-D PPy; (h) reflection loss of filler loading with 7 weight% in paraffin matrix samples with a thickness of 1.5 to 5.0mm in the frequency range of 2 to 18 GHz.