Synthesis of soluble polyaniline in reversed micellar systems

Ichinohe, Daigo; Aral, Tatsuo; Kise, Hideo

doi:10.1016/s0379-6779(96)03843-x

Cited by 50 publications

(19 citation statements)

References 6 publications

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“…Previously we reported that phenylenediamines could be polymerized without enzymes by hydrogen peroxide in reversed micelles of sodium di(2ethylhexyl)sulfosuccinate in isooctane. 20 It was found that the IR spectra of o-, m-, and p-phenylenediamine polymers prepared by the present method are almost identical to those of the polymers prepared in reversed micelles. This suggests Scheme 2. that the chemical processes of polymerization are very similar for these reaction systems, whereas reversed micelles have no specific catalytic sites like protoheme of HRP.…”

Section: Comparison With Poly(phenylenediamine)s Prepared By Other Mesupporting

confidence: 50%

Oxidative polymerization of phenylenediamines catalyzed by horseradish peroxidase

Ichinohe¹,

Muranaka²,

Sasaki³

et al. 1998

J. Polym. Sci. A Polym. Chem.

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Ortho‐, meta‐, and para‐phenylenediamines were polymerized using hydrogen peroxide as an oxidant and horseradish peroxidase as a catalyst in mixed solvents of 1,4‐dioxane and water. The yield of the polymers was strongly dependent on solvent composition, and maximum yields were obtained at 15–30% 1,4‐dioxane. The analysis of circular dichroic spectra of the enzyme suggested that enzyme structure was significantly modified at high 1,4‐dioxane contents, which may be responsible for the decrease of catalytic activity of the enzyme. On the basis of IR and electronic spectra of the polymers, it was considered that o‐ and p‐phenylenediamine polymers retain disubstituted benzene nuclei, which suggests that the polymerization proceeded mainly via N—N coupling. © 1998 John Wiley & Sons, Inc. J. Polym. Sci. A Polym. Chem. 36: 2593–2600, 1998

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Section: Comparison With Poly(phenylenediamine)s Prepared By Other Mesupporting

confidence: 50%

Oxidative polymerization of phenylenediamines catalyzed by horseradish peroxidase

Ichinohe¹,

Muranaka²,

Sasaki³

et al. 1998

J. Polym. Sci. A Polym. Chem.

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“…This finding could be the result of easy removal of POA/Ag after washing with water. Furthermore, one can see that the POA/Ag contents of the composites obtained in the media of sulphonic acids are higher than that of in HNO 3 which may show the incorporation of bulky dopant anions to the POA structure . However, when the volume resistivity values are considered, a similar relation could not be formed with the acid types.…”

Section: Resultsmentioning

confidence: 89%

Fabrication of poly(o‐Anisidine)/Ag particles coated poly(ethylene terephthalate) nonwoven composite and investigation of antibacterial activity

2017

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Poly(ethylene terephthalate) (PET) nonwoven was coated with a conductive polyaniline derivative of poly(o‐anisidine) (POA) and metallic Ag particles by in situ polymerization of o‐anisidine with AgNO3 in an aqueous acidic medium accelerated with a secondary oxidant such as ammonium peroxydisulphate or iron nitrate. The effects of secondary oxidant type, secondary oxidant/AgNO3 mol ratio, type of acid used as polymerization medium, and concentration of acid were studied on POA/Ag content and volume resistivity of the composite. The presence and contribution to the weight fraction of Ag particles to POA/Ag contents were evaluated by X‐ray diffraction and thermogravimetric analysis, respectively. It was observed that the morphology of the conductive coat changed with increasing POA/Ag content. The POA/Ag/PET composite was tested for antibacterial activity against Escherichia coli and Staphylococcus aureus with agar diffusion test, and a significantly high activity was obtained in contrast to a POA/PET composite. POLYM. COMPOS., 39:E358–E365, 2018. © 2017 Society of Plastics Engineers

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“…XPS analysis also showed the presence of increasing amounts of sulfur on the surfaces with increasing Py concentration. The source of sulfur may be either the SDS used as surfactant or the APS used as an initiator 50–52…”

Section: Resultsmentioning

confidence: 99%

Polypyrrole Thin Films Formed by Admicellar Polymerization Support the Osteogenic Differentiation of Mesenchymal Stem Cells

Castano¹,

O’Rear²,

McFetridge³

et al. 2004

Macromolecular Bioscience

114

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The objective of this study was to evaluate the attachment, proliferation, and differentiation of rat mesenchymal stem cells (MSC) toward the osteoblastic phenotype seeded on polypyrrole (PPy) thin films made by admicellar polymerization. Three different concentrations of pyrrole (Py) monomer (20, 35, and 50 x 10(-3) M) were used with the PPy films deposited on tissue culture polystyrene dishes (TCP). Regular TCP dishes and PPy polymerized on TCP by chemical polymerization without surfactant using 5 x 10(-3) M Py, were used as controls. Rat MSC were seeded on these surfaces and cultured for up to 20 d in osteogenic media. Surface topography was characterized by atomic force microscopy, X-ray photoelectron spectroscopy, and static contact angle. Cell attachment, proliferation, alkaline phosphatase (ALP) activity, and calcium content were measured to evaluate the ability of MSC to adhere and differentiate on PPy-coated TCP. Increased monomer concentrations resulted in PPy films of increased thickness and surface roughness. PPy films generated by different monomer concentrations induced drastically different cellular events. A wide spectrum of cell attachment characteristics (from excellent cell attachment to the complete inability to adhere) were obtained by varying the monomer concentration from 20 m to 50 x 10(-3) M. In particular the 20 x 10(-3) M PPy thin films demonstrated superior induction of MSC osteogenicity, which was comparable to standard TCP dishes, unlike PPy films of similar thickness prepared by chemical polymerization without surfactant. Adhesion of mesenchymal stem cells on tissue culture plates (TCP) coated with polypyrrole thin films made by admicellar polymerization.

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Synthesis of soluble polyaniline in reversed micellar systems

Cited by 50 publications

References 6 publications

Oxidative polymerization of phenylenediamines catalyzed by horseradish peroxidase

Oxidative polymerization of phenylenediamines catalyzed by horseradish peroxidase

Fabrication of poly(o‐Anisidine)/Ag particles coated poly(ethylene terephthalate) nonwoven composite and investigation of antibacterial activity

Polypyrrole Thin Films Formed by Admicellar Polymerization Support the Osteogenic Differentiation of Mesenchymal Stem Cells

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