Studies on the synthesis of low molecular weight, one‐dimensional polyanilines prepared by fast emulsion polymerization using (n‐dodecylbenzenesulfonic acid)/HCl emulsifiers

Abstract

Low molecular weight polyaniline nanotubes were prepared by fast emulsion polymerization in the presence of both n‐dodecylbenzenesulfonic acid (DBSA) and HCl(aq). The anilinium monomers associated with DBSA emulsifiers were found to self‐arrange into strands of associated cylindrical micelles before polymerization, as monitored by their optical activity and optical image. In the presence of some HCl(aq), the monomer‐associated cylindrical micelles expanded and the polymerization rate could be speeded up. It was found that the low molecular weight (viscosity‐averaged molecular weight) polyaniline obtained can easily lead to the formation of highly conductive, one‐dimensional nanotubes or nanofibers monitored by the variation of optical activities and λmax of the UV–visible–near IR spectra during polymerization. The DBSA/HCl ratio played an important role in the eventual properties and morphologies of the one‐dimensional polyanilines, which can be illustrated by conductivity, SEM and transmission electron microscopy measurements. The resultant one‐dimensional polyaniline nanotubes can be arranged into a layered structure by orientation, illustrated by AFM and wide‐angle X‐ray diffraction. © 2012 Society of Chemical Industry

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.…”

Conducting polyaniline nanorods doped with aromatic carboxyl chain end functionalized polystyrene

“…In addition, the morphology of each PANI derivative is dependent on the nature of the chemical oxidant and the dopant used in the chemical oxidative polymerization process for the preparation of a specific PANI derivative [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29] [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29]. Furthermore, PANI derivatives doped with different aliphatic and aromatic sulphonic acids affords conducting PANI derivatives with nanostructures [30][31][32][33][34][35][36][37][38][39][40][41].…”

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.…”