Titanium Oxide and Polyaniline Core-Shell Nanocomposites

Chuang, Feng-Yi; Yang, Sze‐Ming

doi:10.1016/j.synthmet.2005.07.299

Cited by 42 publications

(16 citation statements)

References 9 publications

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“…24 Such conducting polymer based composites are expected to exhibit EMI shielding and electrostatic dissipation of charges (ESD) due to their modified electrical and dielectric properties. 25 Most of the conducting polymer composite systems studied in the literature refer to their physical characteristics and mechanism of electric transport, [4][5][6][7][8][9][10][11][12][13][14][15][16]19,20,22 but the studies on EMI shielding properties in the low frequency range are very limited.…”

Section: -15mentioning

confidence: 99%

Electrical Conductivity, Dielectric Behavior and EMI Shielding Effectiveness of Polyaniline-Yttrium Oxide Composites

Faisal¹,

Khasim²

2013

Bulletin of the Korean Chemical Society

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Polyaniline-yttrium trioxide (PAni-Y 2 O 3 ) composites were synthesized by the in-situ polymerization of aniline in the presence of Y 2 O 3 . The composite formation and structural changes in these composites were investigated by X-ray diffraction (XRD), Fourier transform infra red spectroscopy (FTIR), scanning electron microscopy (SEM) and high resolution transmission electron microscopy (HRTEM). The direct current (DC) electrical conductivity of the order of 0.51 × 10 −2 S cm −1 -0.283 S cm −1 in the temperature range 300 K-473 K indicates semiconducting behavior of the composites. Room temperature AC conductivity and dielectric response of the composites were studied in the frequency range of 10 Hz to 1 MHz. The variation of AC conductivity with frequency obeyed the power law, which decreased with increasing weight percentage (wt %) of Y 2 O 3 . Studies on dielectric properties shows the relaxation contribution coupled by electrode polarization effect. The dielectric constant and dielectric loss in these composites depend on the content of Y 2 O 3 with a percolation threshold at 20 wt % of Y 2 O 3 in PAni. Electromagnetic interference shielding effectiveness (EMI SE) of the composites in the frequency range 100 Hz to 2 GHz was in the practically useful range of -12.2 dB to -17.2 dB. The observed electrical and shielding properties were attributed to the interaction of Y 2 O 3 particles with the PAni molecular chains.

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Section: -15mentioning

confidence: 99%

Electrical Conductivity, Dielectric Behavior and EMI Shielding Effectiveness of Polyaniline-Yttrium Oxide Composites

Faisal¹,

Khasim²

2013

Bulletin of the Korean Chemical Society

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“…Combination of PAni with other organic or inorganic materials could yield new functional materials that enhance not only the mechanical property, but also other properties dependent on the additives or fillers used that combine the advantages of each component [9]. Tan et al fabricated solid-state dye-sensitized TiO 2 solar cells by using PAni as a hole-transport [10].…”

Section: Introductionmentioning

confidence: 99%

Morphology studies of doped polyaniline micro/nanocomposites containing TiO₂ nanoparticles and Fe₃O₄ microparticles

Phang

Kuramoto

2008

Polymer Composites

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To produce polyaniline (PAni) nanodevices that display excellent microwave absorbing behaviors, novel hexanoic acid-doped PAni micro/nanocomposites containing TiO 2 nanoparticles and Fe 3 O 4 microparticles (PAni/ HA/TiO 2 /Fe 3 O 4 ) were prepared by template-free method, particularly to improve the dielectric and magnetic property of PAni. PAni/HA/TiO 2 /Fe 3 O 4 synthesized at different polymerization temperatures and polymerization time by various TiO 2 and Fe 3 O 4 contents, and particles size of TiO 2 were prepared. The aim of this research is to investigate the effect of synthesis condition on the morphology behaviors of nanorods/tubes. The resulted nanorods/tubes indicated that PAni micro/ nanocomposites exhibited polymerization through elongation. PAni micro/nanocomposites synthesized at 08C resulted in large amounts of nanorods/tubes compared with those synthesized at subzero temperature and above 08C. PAni/HA/TiO 2 and PAni/HA/TiO 2 /Fe 3 O 4 synthesized using TiO 2 with diameter (particles size) 180 nm resulted in large amounts of nanorods/tubes (diameter nanorods/tubes = 80-140 nm) compared with those synthesized using TiO 2 with diameter of 30 and 6 nm. Increasing TiO 2 and Fe 3 O 4 content above 10% will significantly reduce the amount of nanorods/ tubes. In conclusion, synthesis parameters mentioned above are the significant factors that might affect the morphology behaviors of PAni nanostructures.

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“…X-ray patterns of MWCNT can be found elsewhere and there are sharp and high intensity diffraction peak exist at 2h = 26°a nd two lower intensity peaks at 2h = 45°and 62° [10,23], which are pointed to the diffraction signature of the distance between the walls and the interwall spacing [6]. In the case of PANi, peaks seem near 2h = 20°and 26°, which are attributed to the periodicity parallel and perpendicular to the polymer chains [24]. For PANi/MWCNT nanocomposites, the XRD spectra show mutually both of the characteristic peaks of PANi and that of MWCNT, displaying the attendance of MWCNT in PANi.…”

Section: Low Temperature Polymerization Procedures Of Pani and Pani/mwcntmentioning

confidence: 85%

Facile route for multi-walled carbon nanotube coating with polyaniline: tubular morphology nanocomposites for supercapacitor applications

Imani

Farzi

2015

J Mater Sci: Mater Electron

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A new approach involving low-temperature system has been developed for the polyaniline/multi-walled carbon nanotubes (PANi/MWCNT) composite in which MWCNT are coated with a layer of PANi in a complete tubular morphology. The MWCNT content varied from 0 to 10 %. The effect of MWCNT content on the thickness of PANi layer was studied. SEM technique was used to investigate the morphology and changes in the dimension of nanotubes. The interaction between PANi and MWCNT considering the nature of chain growth has been explained according to the results of FT-IR analysis. The improvement of thermal stability and crystallinity of the nanocomposites has been evaluated by using TGA and XRD, respectively. The results show the thickness of PANi coating on the surface of MWCNT was depended on the MWCNT content. These nanocomposites have been used for supercapacitor electrodes. The galvanostatic chargedischarge measurements indicated that the PANi/MWCNT composites had greater specific capacitances than pure PANi.

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Titanium Oxide and Polyaniline Core-Shell Nanocomposites

Cited by 42 publications

References 9 publications

Electrical Conductivity, Dielectric Behavior and EMI Shielding Effectiveness of Polyaniline-Yttrium Oxide Composites

Electrical Conductivity, Dielectric Behavior and EMI Shielding Effectiveness of Polyaniline-Yttrium Oxide Composites

Morphology studies of doped polyaniline micro/nanocomposites containing TiO₂ nanoparticles and Fe₃O₄ microparticles

Facile route for multi-walled carbon nanotube coating with polyaniline: tubular morphology nanocomposites for supercapacitor applications

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Titanium Oxide and Polyaniline Core-Shell Nanocomposites

Cited by 42 publications

References 9 publications

Electrical Conductivity, Dielectric Behavior and EMI Shielding Effectiveness of Polyaniline-Yttrium Oxide Composites

Electrical Conductivity, Dielectric Behavior and EMI Shielding Effectiveness of Polyaniline-Yttrium Oxide Composites

Morphology studies of doped polyaniline micro/nanocomposites containing TiO2 nanoparticles and Fe3O4 microparticles

Facile route for multi-walled carbon nanotube coating with polyaniline: tubular morphology nanocomposites for supercapacitor applications

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Morphology studies of doped polyaniline micro/nanocomposites containing TiO₂ nanoparticles and Fe₃O₄ microparticles