Synthesis and properties of high-molecular-weight soluble polyaniline and its application to the 4MB-capacity barium ferrite floppy disk's antistatic coating

Ohtani, Akira; Abe, Masao; Ezoe, M.; Doi, Takashi; Miyata, Tadashi; Miyake, Akira

doi:10.1016/0379-6779(93)90499-m

Cited by 77 publications

(34 citation statements)

References 12 publications

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“…Conductivity (S cm -1 ) 1.96x10 -3 1.40x10 -2 5.64x10 -3 Consequently, the molecular weight of PANI has virtually no effect on the electrical conductivity, in agreement with the data reported in literature [3,4,7,8]. Such behavior has been theoretically predicted [19] for the cases when charges hopping from one polymer chain to another are much faster in comparison with the life time of the charge on the chain, i.e., when the interchain transport occurs more readily than the intrachain one.…”

Section: Tab 3 Conductivity Of Doped Pani Powdersupporting

confidence: 81%

“…Ohtani et al [4] reported an increase in the conductivity from 2 to 18 S cm -1 for samples prepared above 20 and below -3 o C, acompanied by the mentioned increase in molecular weight. Kogan et al [10] claimed that decreasing the polymerization temperature has reliably been found to be accompanied by an increase in both molecular weight and electrical conductivity.…”

Section: Introductionmentioning

confidence: 99%

“…MacDiarmid and Epstein [3] reported that the molecular weight of PANI can be decreased by decreasing the polymerization temperature. Ohtani et al [4] observed that weight average molecular weight of PANI, M w , increased from 120 000 to 160 000 when polymerization was carried out above 20 and below -3 o C, respectively. Oh et al [5] polymerized aniline at 0 and -30 o C; M w was 6.8 times higher at lower temperature.…”

Section: Introductionmentioning

confidence: 99%

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The influence of polymerization temperature on structure and properties of polyaniline

Yılmaz

Küçükyavuz

2009

E-Polymers

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Abstract:The influence of polymerization temperature (from -25 to +25 o C) on molecular weight, crystallinity, electrical conductivity, thermal and morphological properties of polyaniline has been investigated. Aniline was oxidized in an aqueous medium with ammonium persulfate and 1.0 M hydrochloric acid. The reaction mixture freezes below -10 o C and hence lithium chloride was used in sufficient amount to prevent freezing. As the reaction temperature decreases, both the molecular weight of polyaniline and its crystallinity increase. Thermal studies show a common three step decomposition pattern irrespective of the temperature used during synthesis. The morphology of polyaniline changes from granular (reaction in liquid medium) to tubular (polymerization in the frozen state). Thermal analysis indicated that the polyaniline stability increased with decreasing synthesis temperatures. Electrical conductivity of polyaniline was found to be independent of the polymerization temperature and, consequently, of the molecular weight.

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Section: Tab 3 Conductivity Of Doped Pani Powdersupporting

confidence: 81%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The influence of polymerization temperature on structure and properties of polyaniline

Yılmaz

Küçükyavuz

2009

E-Polymers

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“…Conducting polymers have become a popular basic material for advanced applications such as rechargeable batteries [1], optical devices [2], membranes [3], sensors and biosensors [4] [5], electromagnetic interference (EMI) shielding [6], antistatic coatings [7], etc. Among the conducting polymers family, PANI has attracted considerable attention because of its unique electrical, optical and electro-optical properties and its numerous potential applications [8].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Perfluorooctanoic Acid Anionic Surfactant Doped Nanosize Polyaniline

Mahalakshmi¹,

Vedhi²

2014

OJSTA

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Surfactant doped polyaniline was synthesized in the aqueous solution of aniline and anionic surfactant of perfluorooctanoic acid (PFO) by chemical synthesis using potassium peroxy disulphate as an oxidant by varying the aniline to surfactant ratio. The solubility of the chemically prepared surfactant doped polyaniline (PANI) was ascertained and it showed good solubility in dimethyl sulfoxide (DMSO), dimethylformamide (DMF), acetone, acetonitrile, ethanol, aceticacid, trichloroethylene, dichloromethane, tetrahydrofuran, ethylacetate, diethylether, toluene, chloroform and sparingly soluble in n-hexane and water. The prepared polymers were characterized by fourier transform infrared spectroscopy (FTIR), UV-visible, X-ray diffraction (XRD), cyclic voltammetric (CV), EIS and scanning electron microscopy (SEM). The analysis of UV-visible and FTIR showed that aniline has been polymerized to PANI in its conducting emeraldine form. FTIR spectra showed that the peaks at 1670, 3315 and 1400 cm −1 corresponded to PFO. FTIR spectra showed that amine peak observed at 1593 cm −1 was shifted to lower wave number due to the interaction between PANI and the surfactant. SEM analysis showed that the variation in morphology of doped PANI was predominantly dependent on the concentration of the surfactant. Elemental analysis was done by energy dispersive spectroscopic (EDAX) which shows the presence of C, N, O, S and F. XRD pattern showed that the formation of nanosized (18 nm) and crystalline polymer. CV studies of the synthesized polymer exhibited good adherent behavior on electrode surface. It exhibited three oxidation peaks at approximately 0.283 V, 0.541 V and 0.989 V and two reduction peaks at 0.1421 and 0.3854 V. Electrical conductivity of PFO doped PANI was studied by impedance spectroscopic method.

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“…Because of their unique properties such as high specific capacitance, involvement of whole polymer mass in the charging process, high conductivity in the doped state and fast charge/discharge electron transfer kinetics, many researchers have been involved in the development of supercapacitors using various conducting polymer based electrode materials [4][5][6][7][8][9]. Among the conducting polymers, polyaniline has been of much interest for supercapacitor application, due to its environmental stability and high electrical conductivity [10][11][12][13]. The electrochemical activity of the dedoped form of PANI is very low because of the volumetric shrinkage during the elimination of counter ions, and the low conductivity of this state leads to high ohmic polarization, which reduces the reversibility and stability of the supercapacitor.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of a Novel Polymer Nanohybrid Electrode Material PANI-BaMnO3 for High Power Supercapacitor Application

Shanmugavadivel¹,

Dhayabaran²,

Subramanian³

2017

Port. Electrochim. Acta

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The electro active inorganic-organic nanohybrid material Polyaniline-BaMnO3 has been synthesized by the surfactant assisted chemical polymerization reaction of aniline with nanocrystalline BaMnO3. Electrochemical studies have been performed using cyclic voltammetry and galvanostatic charge-discharge measurements.The enhanced electrode performance originates from the synergistic effect of PANI and BaMnO3. The hybrid delivers very high specific capacitance of 560.5 Fg -1 , energy density of 32.01 whkg -1 and power density of 400 wkg -1 , respectively. The hybrid also exhibits very high stability and excellent cycling performance with less than 5% capacity loss over 500 cycles.

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Synthesis and properties of high-molecular-weight soluble polyaniline and its application to the 4MB-capacity barium ferrite floppy disk's antistatic coating

Cited by 77 publications

References 12 publications

The influence of polymerization temperature on structure and properties of polyaniline

The influence of polymerization temperature on structure and properties of polyaniline

Synthesis and Characterization of Perfluorooctanoic Acid Anionic Surfactant Doped Nanosize Polyaniline

Fabrication of a Novel Polymer Nanohybrid Electrode Material PANI-BaMnO3 for High Power Supercapacitor Application

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