Preparation of water soluble poly(aniline) and its gas-sensitivity

Abstract

Water soluble poly(aniline) was prepared using the chemical oxide method by adding a small amount of poly(sodium-p-styrenesulfonate). Poly(aniline) composite film on interdigital electrodes of carbon was formed via the spin-coating approach. After pretreatment of exposure in an alkalescence atmosphere and desorption with high-purity N₂, the film showed an excellent sensitivity to trimethylamine of 5.14 × 10⁻⁷ mol mL⁻¹. Moreover, this film also had a good selectivity to analogous gases and a fast response while exhibiting a good reproducibility. It was easily recovered by high-purity N₂.