An Electrochemical and Optical Investigation of Polypyrrole/Polyethyleneoxide Latex Particles

O̸degaård, R.; Skotheim, Terje A.; Lee, H. S.

doi:10.1149/1.2085342

Cited by 25 publications

(10 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, it is consistent with the conductivities (typically 10 -2 to 10 0 S cm -1 ) of various polypyrrole colloids reported by many research groups. [20][21][22][23][24][25][26][27][28][29][30] This lower conductivity is not believed to be due to any reduction in the intrinsic conductivity of the polypyrrole. On the contrary, the Cl/N ratio of 0.25 calculated from elemental microanalyses and the IR spectrum 36 of the colloid both indicate that the conducting polymer component of the particles is in its heavily-doped, highlyconductive state.…”

Section: Resultsmentioning

confidence: 99%

“…In 1986 Bjorklund and Liedberg reported the first synthesis of colloid polypyrrole particles using methylcellulose in aqueous media . Subsequently, various research groups have shown that a wide range of both commercial − and tailor-made , water-soluble polymers can be used as steric stabilizers for polypyrrole. These dispersions generally exhibit good long-term colloid stability: in our own laboratory we have samples which are more than six years old and exhibit no signs of flocculation.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

X-ray Photoelectron Spectroscopy Studies on Sterically-Stabilized Polypyrrole Particles

Beadle¹,

Armes²,

Greaves³

et al. 1996

Langmuir

View full text Add to dashboard Cite

The surface composition of a sterically-stabilized polypyrrole colloid has been examined by X-ray photoelectron spectroscopy (XPS). The sulfur atom of the polyelectrolyte stabilizer poly(potassium 3-sulfopropyl methacrylate) [PKSPM] and the nitrogen atom of the polypyrrole were used as unique elemental markers for each component. The S/N atomic ratio at the particle surface determined using XPS was found to be significantly higher than the corresponding ‘macroscopic' S/N atomic ratio calculated from elemental microanalyses. This is the first direct evidence for the presence of a stabilizer-rich layer at the surface of sterically-stabilized conducting polymer particles. Changing to a lower energy X-ray source (Mg Kα) did not lead to an increase in the surface S/N ratio; thus, the stabilizer layer is probably ‘patchy' rather than a continuous coating. XPS also revealed that the surface concentrations of the K+ and Cl- counterions in the colloid were substantially depleted relative to those found in the PKSPM stabilizer and chloride-doped polypyrrole ‘bulk powder'. Moreover, the surface dopant level of the polypyrrole particles calculated on the basis of the remaining chloride ions was unusually low (Cl/N = 0.07). More realistic surface dopant levels were obtained if it was assumed that some of the sulfonate groups of the polyelectrolyte stabilizer acted as dopant anions for the conducting polymer component. It was concluded that the PKSPM stabilizer is adsorbed onto the surface of the polypyrrole particles as a polymeric dopant anion, with the concomitant expulsion of KCl. Finally, there is some evidence that this stabilizer is present as a polymeric dopant in the interior of the particles as well.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

X-ray Photoelectron Spectroscopy Studies on Sterically-Stabilized Polypyrrole Particles

Beadle¹,

Armes²,

Greaves³

et al. 1996

Langmuir

View full text Add to dashboard Cite

show abstract

“…The preparation of PPy in its colloidal forms has been sought to improve its processibility. Therefore, many kinds of steric stabilizers including poly(vinyl pyrrolidone) (PVP) [5], poly(ethylene oxide) (PEO) [6], poly(styrene sulfonate)(PSS) [7], poly(vinyl methyl ether) (PVME) [8,9], ethylhydroxycellulose [10] and so on have already been used to prepare PPy dispersions. Copolymers like poly(N-isopropylacrylamide-co-acrylamide) is also a candidate for stabilizing PPy dispersion [11].…”

Section: Introductionmentioning

confidence: 99%

Stability and particle size of polypyrrole dispersion using sodium dodecylbenzenesulfonate as surfactant

Xing

Guo

2007

E-Polymers

View full text Add to dashboard Cite

Polypyrrole (PPy) dispersion was prepared using FeCl 3 ·6H 2 O as oxidant in the presence of sodium dodecylbenzenesulfonate (SDBS) as surfactant. The formation of the micelles and the electrostatic interaction between PPy and SDBS were considered the driving forces for the formation and stability of the dispersion. UV/Vis/NIR, FTIR spectra and SEM images were studied to confirm the structure and morphology of the PPy dispersion, respectively. Polymerization of pyrrole under different preparation conditions including the concentration of the surfactant, the pyrrole monomer and the oxidant and also the addition of acid were carried out in order to investigate their effects on the stability and average particle size of the dispersions. The conductivity of the resulting PPy particles was measured and a comparison between the PPy and polyaniline dispersion formed with SDBS as surfactant was also given.

show abstract

“…[7][8][9][10] In these studies, the PPy "core" is surrounded by an outer layer of an adsorbed, solvated water-soluble polymer which acts as a steric stabilizer. Suitable stabilizers include methyl cellulose, poly(N-vinyl pyrrolidone), poly(vinyl acetate), poly-(ethylene oxide), and poly(vinyl methyl ether).…”

Section: Introductionmentioning

confidence: 99%

“…To improve the processibility of these materials, some studies have been reported on the synthesis of sterically stabilized dispersions of PPy particles with submicrometer sizes. [7][8][9][10] In these studies, the PPy "core" is surrounded by an outer layer of an adsorbed, solvated water-soluble polymer which acts as a steric stabilizer. Suitable stabilizers include methyl cellulose, poly(N-vinyl pyrrolidone), poly(vinyl acetate), poly-(ethylene oxide), and poly(vinyl methyl ether).…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of nanosized polypyrrole–polystyrene composite particles

Gan

Siow

et al. 2003

J of Applied Polymer Sci

View full text Add to dashboard Cite

Nanosized polypyrrole-polystyrene (PPy-PS) composite particles were synthesized by the polymerization of pyrrole on PS nanoparticles in the presence of FeCl 3 . The PS nanoparticles were prepared from microemulsion polymerizations using the cationic nonpolymerizable surfactant cetyltrimethylammonium bromide (CTAB), the nonionic polymerizable surfactant -methoxy[poly(ethylene oxide) 40 ]undecyl ␣-methacrylate (PEO-R-MA-40), or the cationic polymerizable surfactant -acryloyloxyundecyltrimethylammonium bromide (AUTMAB). For the latexes stabilized by CTAB, the resulting PPy-PS composite particles exhibited relatively poor colloidal stability and the pressed pellets exhibited relatively low electrical conductivities (ϳ10 Ϫ7-10 Ϫ3 S cm Ϫ1 ). However, for the latexes stabilized by polymerizable surfactants, the resulting PPy-PS composite particles exhibited relatively good colloidal stability and relatively high conductivities (ϳ10 Ϫ5 -10 Ϫ1 S cm Ϫ1 ). The effect of polymerizable surfactants on the colloidal stability of composite particles and the conducting mechanism of the composites are discussed.

show abstract

An Electrochemical and Optical Investigation of Polypyrrole/Polyethyleneoxide Latex Particles

Cited by 25 publications

References 11 publications

X-ray Photoelectron Spectroscopy Studies on Sterically-Stabilized Polypyrrole Particles

X-ray Photoelectron Spectroscopy Studies on Sterically-Stabilized Polypyrrole Particles

Stability and particle size of polypyrrole dispersion using sodium dodecylbenzenesulfonate as surfactant

Synthesis and characterization of nanosized polypyrrole–polystyrene composite particles

Contact Info

Product

Resources

About