Short polyaniline nanorod prepared in the presence of para‐phenylenediamine

Abstract

para-Phenylenediamines (pPDAs) were mixed with aniline to synthesize a low molecular weight, nanowired polyaniline via emulsion polymerization, which demonstrated smaller intrinsic viscosity. Fourier transform infrared-spectra illustrated the presence of phenazines in the polymers in the presence of pPDA. Free carrier-tails in UV-Vis-NIR spectra are still present but their numbers decreased with pPDAs. Scanning electronic microscopy and transmission electronic microscopy (TEM) images showed the neat PANINTs shrank significantly and became randomly distributed after dedoping but the diameters of the PANINT-pPDAs decreased slightly. TEM micrographs demonstrated the hollow morphology for the neat PANINTs but that of PANINT-pPDA was shorter, solid nanowires. X-ray diffractions patterns illustrated a layered structure for neat PANINTs which own a long c-axis, not found for PAN-INT-pPDAs.

Superparamagnetic, High Magnetic α-Fe & α″-Fe16N2 Mixture Prepared from Inverse Suspension-Polymerized Fe3O4@polyaniline Composite

“…If most of the Fe 3 O 4 (OA) in the nanocomposite is completely covered or embedded in the PANI matrix, it can also induce the shifting of the λ max of PANI in the UV–Vis spectra due to the interaction. Figure 2 illustrates the flattening effect on the λ max in the NIR region, the so-called free carrier-tail [ 14 , 15 , 16 , 17 , 18 ] in this region for the PANI(ES)-Em prepared via emulsion polymerization. It also represents a nanofibrous morphology that contributes to the carrier-tail due to the highly extended conjugation chain length.…”

“…Usually, PANIs that provide carbon and nitrogen sources can be prepared in affluent water [ 14 , 15 , 16 , 17 , 18 ] easily using water-soluble anilinium monomers. The Fe 3 O 4 particles prepared from the sol-gel method are usually hydrophilic materials with some –OH groups on the surfaces.…”

New Inverse Emulsion-Polymerized Iron/Polyaniline Composites for Permanent, Highly Magnetic Iron Compounds via Calcination

“…PANI(EB) is usually prepared with the common emulsion polymerization [ 11 , 12 , 13 , 14 , 15 ] method in the affluent water, where aniline monomers (anilinium) are soluble. However, nano-Fe 3 O 4 obtained from the sol–gel approach carries hydroxyl groups on the surface and can disperse well in water as well.…”

“…The eventual goal of different studies is to prepare a composite with a dominant ferrite core covered with hard/stable cementite or ferric nitride as the protecting material preventing further oxidation in the atmosphere. PANI(EB) is usually prepared with the common emulsion polymerization [11][12][13][14][15] method in the affluent water, where aniline monomers (anilinium) are soluble. However, nano-Fe 3 O 4 obtained from the sol-gel approach carries hydroxyl groups on the surface and can disperse well in water as well.…”

Studies on one-dimensional polyanilines prepared withn-dodecylbenzenesulfonic and camphorsulfonic acids

“…In our previous studies, different types of polyaniline nanotube (PANINT) with morphologies of either long or short nanotubes or nanofibers were prepared by emulsion polymerization in the presence of excess n ‐dodecylbenzenesulfonic acid (DBSA) which also behaved as a solubility improving agent with its high solubility in common organic solvents. These DBSA‐doped PANINTs can be well dispersed in organic aromatic solvents like toluene, m ‐cresol etc.…”