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Conductive polymer hydrogel with PANI. (a) Schematic for the preparation of PANI/CNF/PVA composite hydrogels. (b) Conductivity variation of PANI/CNF/PVA gels with changed mass ratio of ANI monomers to CNFs. (c) Illustration of self-healing process of hydrogels. (d) Luminance change of a green LED and the relative resistance change of hydrogels under varying strains.
