Preparation and dedoping-resistant effect of self-doped polyaniline/cellulose fibers (SPANI/CF) hybrid.

Self-doped polyaniline/cellulose fibers (SPANI/CF) hybrid was in situ prepared by copolymerization of aniline and metanilic acid in presence of cellulose fibers to improve its dedoping-resistant ability. The results indicated that the SPANI/CF hybrid was remarkably more resistant to dedoping by alkaline aqueous solution than the polyaniline/cellulose fibers (PANI/CF) hybrid. Self-doping did not increase the electrical conductivity of the hybrid, but increased its flame retardancy. Both the electrical conductivity and oxygen index of the SPANI/CF hybrid decreased after ammonia soaking treatment, and the color changed gradually from green to bluish violet with increase of the ammonia concentration. The original (non-dedoped) and dedoped SPANI/CF and PANI/CF hybrids were characterized by attenuated total reflection (ATR) Fourier-transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM) analyses, revealing the occurrence of deprotonation during ammonia soaking treatment. Compared with the PANI/CF hybrid, additional ring substitution with sulfo groups was probably responsible for the significantly better dedoping-resistant ability of the SPANI/CF hybrid. [ABSTRACT FROM AUTHOR]