Fabrication of multifunctional polypyrrole hydrogel enhanced by polyvinyl alcohol

The latest research progress of conductive hydrogels in the field of electrophysiological signal acquisition

“…The PPy/PVA hydrogels also possessed a satisfactory electrical conductivity (10 S m À1 ), good processability and self-healing properties, showing more than 90% recovery even after 1000 cycles at 30% compressive strain. 70 In addition, to overcome the problems of a low polymerization rate and inhomogeneous deposition of PPy, Tie et al 71 made PPy@CNF composites well dispersed in suspension by efficiently and uniformly coating PPy nanorods on CNFs. The hydrogel designed by this suspension, poly(vinyl alcohol) (PVA) and phytic acid (PA), has a high conductivity (8.0 S m À1 ), a suitable modulus and good mechanical properties (460%, 0.42 MPa).…”