Electrical, structural and magnetic properties of polyaniline/pTSA-TiO2 nanocomposites

Nagaraja, M.; Pattar, Jayadev; Shashank, N.; Manjanna, J.; Kamada, Y.; Rajanna, K.; Mahesh, H.M.

doi:10.1016/j.synthmet.2008.12.025

Cited by 55 publications

(27 citation statements)

References 25 publications

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“…The samples show clear hysteresis loop at room temperature, even for an extremely small Co doping (Co3:ES), indicating ferromagnetic behavior. Pure ES sample shows a paramagnetic behavior, which has been documented [22] and has been also checked by us (results not shown). As expected, the samples show an increased magnetization from 0.11 to 1.34 emu/g with the increase of Co nanoparticles from 1 to 10 wt%.…”

Section: Ft-ir Studysupporting

confidence: 73%

Cobalt nanoparticles doped emaraldine salt of polyaniline: A promising room temperature magnetic semiconductor

Hatamie

Kulkarni

et al. 2010

Journal of Magnetism and Magnetic Materials

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Section: Ft-ir Studysupporting

confidence: 73%

Cobalt nanoparticles doped emaraldine salt of polyaniline: A promising room temperature magnetic semiconductor

Hatamie

Kulkarni

et al. 2010

Journal of Magnetism and Magnetic Materials

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“…However, the data on magnetization of PANI/HA/TiO 2 nanocomposite (without SWNT and MWNT) and pure PANI/HA (without any filler) have not been reported. Nagaraja et al [32] have obtained diamagnetic response from PANI/ para ‐toluene sulfonic acid (pTSA)‐TiO 2 (20%) nanocomposite in the temperature range from 300 K down to 50 K and weak ferromagnetism below 50 K. The PANI/pTSA without TiO 2 was found to be either paramagnetic or weakly ferromagnetic from 300 K down to 5 K. A nearly temperature‐independent magnetization is observed in both cases down to 50 K, and below this temperature the magnetization increases rapidly.…”

Section: Introductionmentioning

confidence: 99%

Ferromagnetic polyaniline/TiO₂ nanocomposites

et al. 2012

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Novel ferromagnetic semiconducting polyaniline PANI/TiO2 nanocomposites were synthesized by the oxidative polymerization of aniline with ammonium peroxydisulfate in an aqueous medium, in the presence of colloidal TiO2 nanoparticles (d ∼ 4.5 nm), without added acid. The morphological, magnetic, structural, and optical properties of the PANI/TiO2 nanocomposites prepared at initial aniline/TiO2 mole ratios 80, 40, and 20 were studied by scanning electron microscopy, superconducting quantum interference device, X‐ray powder diffraction, FTIR, Raman, and UV‐Vis spectroscopies. The emeraldine salt form of linear PANI chains as well as the presence of phenazine units, branched PANI chains, and anatase crystalline structure of TiO2 in PANI/TiO2 nanocomposites was confirmed by FTIR and Raman spectroscopies. The electrical conductivity of synthesized composites was ∼10−3 S cm−1. The room temperature ferromagnetic response with coercive field of Hc ∼ 300 Oe and the remanent magnetization of Mr ∼ 4.35 × 10−4 emu/g was detected in all investigated PANI/TiO2 nanocomposites. POLYM. COMPOS., 2012. © 2012 Society of Plastics Engineers

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“…Characterisation of nanocomposite 12 supposed that the decrease in conductivity of polyaniline nanocomposites may be due to blockage of conduction path by nanoparticles embedded in the PAni matrix. Figure 1 shows IR absorption spectra of synthesised PAniCNs.…”

Section: Resultsmentioning

confidence: 99%

Comparative assessing on corrosion protection effects of zinc rich ethyl silicate primers modified with undoped and HCl doped PAni–clay nanocomposite

Akbarinezhad

Ebrahimi

Sharif

et al. 2011

Corrosion Engineering, Science and Technology

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This paper presents the works carried out to synthesise undoped and doped polyaniline-clay nanocomposite (PAniCN) by chemical oxidative polymerisation of aniline monomers in the presence of Cloisite 30B nanoclay powders. Fourier transform infrared analysis was used to characterise the synthesised nanocomposites. Electrical conductivity test was used to compare the conductivity of different PAniCN powders. The synthesised nanocomposites were added to a zinc rich ethyl silicate primer to modify the barrier properties of the primer. Unmodified and modified primers were applied on the carbon steel panels separately. The corrosion protection performances of different primers were evaluated via determining open circuit potential (OCP) and electrochemical impedance spectroscopy during immersing in 3?5% sodium chloride solution for a period of 120 days. Electrochemical impedance spectroscopy analysis showed that the coating resistances R c of modified primers were higher than the original primer. Coating resistance of the undoped and doped PAniCN modified primers and original primer were reached to 6?056610 3 , 5?565610 3 and 2?773610 3 V cm 2 after 120 days of immersing respectively. Open circuit potential measurements were carried out in order to evaluate the cathodic protection ability and duration. These measurements revealed that although the undoped PAniCN modified primer showed the highest resistance, the OCP of the panels coated with this modified primer pass through safety region [20?86 V(SCE)] after 120 days of immersion. Besides salt spray test (according to ASTM B117-03) was used as a widespread accelerated test to evaluate the protection performances of primers. In salt spray test spots of rust appear on the surface of the panels coated with undoped PAniCN modified primer after 1500 h of exposure. The results of OCP measurement test were confirmed by the results of salt spray test.

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Electrical, structural and magnetic properties of polyaniline/pTSA-TiO2 nanocomposites

Cited by 55 publications

References 25 publications

Cobalt nanoparticles doped emaraldine salt of polyaniline: A promising room temperature magnetic semiconductor

Cobalt nanoparticles doped emaraldine salt of polyaniline: A promising room temperature magnetic semiconductor

Ferromagnetic polyaniline/TiO₂ nanocomposites

Comparative assessing on corrosion protection effects of zinc rich ethyl silicate primers modified with undoped and HCl doped PAni–clay nanocomposite

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Electrical, structural and magnetic properties of polyaniline/pTSA-TiO2 nanocomposites

Cited by 55 publications

References 25 publications

Cobalt nanoparticles doped emaraldine salt of polyaniline: A promising room temperature magnetic semiconductor

Cobalt nanoparticles doped emaraldine salt of polyaniline: A promising room temperature magnetic semiconductor

Ferromagnetic polyaniline/TiO2 nanocomposites

Comparative assessing on corrosion protection effects of zinc rich ethyl silicate primers modified with undoped and HCl doped PAni–clay nanocomposite

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Ferromagnetic polyaniline/TiO₂ nanocomposites