Selenious acid‐doped polyaniline synthesis and characterization by chemical oxidative solid‐state polymerization of aniline with SeO₂ as an oxidizing agent

Abstract

The current study describes a novel one‐step chemical oxidative solid‐state polymerization of aniline at room temperature using selenium dioxide. Selenium dioxide works as both oxidizing agent and dopant for the polymerization of aniline in solid‐state synthesis. The optimum polymerization conditions, such as reaction time and oxidant‐to‐monomer ratio, were investigated to synthesize selenious acid‐doped polyaniline (PANI‐SA) with high yield and conductivity. Various techniques were used to characterize the prepared PANI‐SA. The X‐ray diffraction pattern of PANI‐SA reveals that the polymer has an amorphous structure. The four‐probe method was used to measure conductivity. The conductivity increases as the oxidant mole ratio increases, but the conductivity decreases as the oxidant mole ratio increases further. Our results demonstrate that for a 24 h reaction time, an oxidant‐to‐monomer mole ratio of 1:1.5 leads to the highest conductivity of 0.488 S cm−1. © 2021 Society of Industrial Chemistry.

Mechanochemical Synthesis of Polyanilines and Their Nanocomposites: A Critical Review

“…However, TEM images of the polymer composites show that the MC procedure renders layered arrangements of PANI–polyacid while the polymerization in solution gives globular structures. Recently Peramal et al used SeO 2 as an oxidant to polymerize aniline hydrogen sulfate [ 71 ]. They ground in a mortar for 1 hr and let the material rest for 24–48 h, observing the effect on polymer properties.…”