Preparation of aqueous polyaniline dispersions by micellar‐aided polymerization

Abstract

Polyaniline (PAn) dispersed in water was prepared with sodium dodecylsulfonate (SDS) as a surfactant with varying concentrations of aniline and HCl and molar ratios of SDS/aniline. The PAn dispersion was homogeneous and stable, and its pH value could be adjusted. The conductivity of PAn powder, precipitated from this dispersion, was as high as 20 S/cm. The transmission electron microscopy morphology of PAn assembled in the dispersion was particle-like, fiber-like, or coil-like, depending on the initial concentration of SDS and aniline. The polymerization of aniline was accelerated by SDS, which was confirmed by open-circuit potential measurement during the polymerization process.

Synthesis of tailor‐made nanoporous polyaniline derived with PVA/alkaline metal system for metal complexation

“…Accordingly, PANI nanostructures can be made by introducing ''structural directors'' into the chemical polymerization bath. These structural directors include ''soft templates'' such as surfactants, 16 organic dopants, 17 or polyelectrolytes 18 that assist in the self-assembly of PANI nanostructures. Kaner et al reported that by using relatively dilute aniline solutions, PANI nanofibers could be obtained when the oxidant was added at a single time, whereas only granular PANI particulates were formed when the oxidant was added dropwise.…”

“…3(e)]. 16 XRD of PANI-metal composites exhibited intense peaks corresponding to the same range for the aggregated PANI structure [ Fig. 3(a-d)].…”

Influence of Binary Oxidant (FeCl<sub>3</sub>:APS) Ratio on the Spectroscopic and Microscopic Properties of Poly(2,5-Dimethoxyaniline)

“…Nano-particles synthesized by PANI are also widely reported in literature as they are processable by dispersion in common organic solvents [11]. One dimensional nano-structures of PANI is being synthesized by chemical oxidative or electrochemical polymerization of monomer with the help of surfactant acting as a template, [17] whereas PANI nanorods and nanotubes have been synthesized without using any surfactant [8,18]. Formation of a cluster of hexagonal nanorods of PANI is also reported in literature [10] by using binary oxidants during its synthesis.…”

A Room Temperature Polyaniline Nanofiber Hydrogen Gas Sensor

“…The previous methods for making polyaniline nanostructures usually require structure-directing templates, such as zeolite channels [26] or nanoporous membranes [27], surfactants [28], etc. These complex synthetic conditions require removal of the templates at the end of the reaction, resulting in low production rates.…”