Synthesis of soluble polypyrrole of the doped state in organic solvents

Lee, J.Y.; Kim, D.Y.; Kim, C.Y.

doi:10.1016/0379-6779(95)03359-9

Cited by 217 publications

(77 citation statements)

References 11 publications

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“…In addition, improvement in the solubility of PPy has been obtained when such very large molecules are used in chemical polymerization at low temperature. 21 Electrocoating of mild steel and iron with PPy has been studied, and in aqueous electrolytes the anodic electrodeposition onto those metals is complicated because of competition between PPy oxidation and iron dissolution. Beck et al 22 recently reported the formation of strongly adherent PPy layers on an iron substrate in an aqueous oxalic acid solution.…”

Section: Introductionmentioning

confidence: 99%

Surface and electrochemical study of DBSA‐doped polypyrrole films grown on stainless steel

Prissanaroon

Brack

Pigram

et al. 2002

Surface & Interface Analysis

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Electrically conducting polypyrrole films doped with dodecylbenzenesulphonic acid (PPy-DBSA) have been electrochemically polymerized on stainless steel. The surface and electrochemical properties of the films were investigated by a combination of cyclic voltammetry (CV), scanning electron microscopy (SEM) and x-ray photoelectron spectroscopy (XPS). The CV results showed an irreversible reaction of electropolymerization. All PPy-DBSA films had a nodular or cauliflower-like surface morphology. The grain size was dependent on the growth current density and the growth time. The ratio of incorporated DBSA anions to pyrrole repeat units in the films was ∼1 : 2. The doping level, calculated from the positive charge accumulated in the polymer chain (at.% ratio .N + + N 2+ //N total /, varied as a function of the growth current density and the growth time. The maximum doping level occurred at a growth current density of 0.5 mA cm −2 , consistent with an oxidation peak of the pyrrole monomer observed by CV. The interfacial layer between the polymer and substrate was also studied. A sulphur-rich layer was observed, indicating the presence of a thin layer of DBSA at the interface. In addition, iron was detected on the metal side of the film as a result of its dissolution from the stainless-steel electrode during the electropolymerization process. These results have implications for the use of polypyrrole films as environmentally friendly corrosion mitigants.

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Section: Introductionmentioning

confidence: 99%

Surface and electrochemical study of DBSA‐doped polypyrrole films grown on stainless steel

Prissanaroon

Brack

Pigram

et al. 2002

Surface & Interface Analysis

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“…Currently, aromatic acid derivatives and organic sulfonates are widely used, such as dodecylbenzene sulfonic acid (DBSA), p-toluenesulfonic acid (TsOH) [6], etc. Lee et al [7] developed DBSA with surface-active properties as anionic additive to realize pyrrole (Py) solvation. Further studies pointed out that adding other large dopants could reduce the interchain links, resulting in the increase of the conductivity and solubility [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of polypyrrole doped with anionic spherical polyelectrolyte brushes

Na¹,

Li²,

Yuan³

et al. 2012

Express Polym. Lett.

172

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Abstract. The procedures for the synthesis of polypyrrole (PPy) doped with anionic spherical polyelectrolyte brushes (ASPB) (PPy/ASPB nanocomposite) by means of in situ chemical oxidative polymerization were presented. Fourier transform infrared spectroscopy (FTIR) and Raman spectroscopic analysis suggested the bonding structure of PPy/ASPB nanocomposite. Scanning electron microscopy (SEM) was used to confirm the morphologies of samples. The crystallographic structure, chemical nature and thermal stability of conducting polymers were analyzed by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and Thermo-gravimetric analysis (TGA) respectively. Investigation of the electrical conductivity at room temperature showed that the electrical conductivity of PPy/ASPB nanocomposite was 20 S/cm, which was higher than that of PPy (3.6 S/cm).

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“…For composites prepared in aqueous solution, typical cauliflower-like mound 22 of PPy layer is seen on the surface of CDa films, as shown in Figure 2(a), and a sandwich structure within the inner section, as shown in Figure 2(b). Actually, for shorter immersing time, the sandwich structure of black PPy/CDa layer outside and gray CDa inside was observed directly.…”

Section: Comparison Of Polymerization Methodsmentioning

confidence: 96%

Supercritical carbon dioxide assisted preparation of conductive polypyrrole/cellulose diacetate composites

Sun

Liao

et al. 2006

J of Applied Polymer Sci

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Supercritical carbon dioxide (SC-CO 2 ) has been used to assist the preparation of conductive polypyrrole/cellulose diacetate (PPy/CDa) composites by in situ chemical oxidative polymerization. The morphology and conductivity of resulted composites were investigated with scanning electron microscopy and four-probe method, respectively. With the assistance of strong swelling effect of SC-CO 2 , composite films were obtained with a macroscopically homogeneous structure and conductivity up to 10 Ϫ1 S cm Ϫ1 order of magnitude. Increasing the pressure of SC-CO 2 increased conductivity, while increasing the temperature decreased conductivity. For comparison, PPy/CDa composite was also prepared with conventional oxidative method in aqueous solution. From the viewpoint of conductivity and environmental protection, the SC-CO 2 method showed its superiority over the conventional one.

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Synthesis of soluble polypyrrole of the doped state in organic solvents

Cited by 217 publications

References 11 publications

Surface and electrochemical study of DBSA‐doped polypyrrole films grown on stainless steel

Surface and electrochemical study of DBSA‐doped polypyrrole films grown on stainless steel

Synthesis and characterization of polypyrrole doped with anionic spherical polyelectrolyte brushes

Supercritical carbon dioxide assisted preparation of conductive polypyrrole/cellulose diacetate composites

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