Comment on ‘Giant electrorheological activity of high surface area mesoporous cerium-doped TiO2 templated by block copolymer’

Park, B.J.; Sung, Jang Hyun; Lee, I.S.; Choi, Hyoung Jin

doi:10.1016/j.cplett.2005.08.097

Cited by 11 publications

(5 citation statements)

References 7 publications

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“…[30] Furthermore, ah ighE Re ffect depends on al arge De', which is defined as the difference between the e' frequencies extrapolated to zero (e' 0 )and infinity (e' 1 ). [31] The dielectric constants e' 0 and e' where e* is the complex permittivity, e' the dielectric constant , e'' the loss factor and e 0 0 and e 0 1 are the limit values; [32] w is www.chemnanomat.org the frequency and l is the dielectric relaxation time from the interfacial polarization.T he relaxation time l can be calculated by:…”

Section: Resultsmentioning

confidence: 99%

Intercalation of Nickel(II) and Iron(II) Metallosupramolecular Polyelectrolytes in Montmorillonite: Nanocomposites and their Electrorheological Properties

2015

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Nanocomposites obtained from the montmorillonite clay (Na0.36(Al1.64Mg0.36)Si4O10(OH)2⋅n H2O) and metallosupramolecular polyelectrolytes (MEPE) with iron(II) and nickel(II) are prepared by an aqueous intercalation reaction. Intercalation of MEPE in the interlayer structure of montmorillonite (MMT) is confirmed by different analytical techniques including powder X‐ray diffraction, FTIR spectroscopy, and thermal analysis. We note a difference in the intercalation behavior between NiII and FeII. The intercalation of Fe‐MEPE is hindered by traces of Fe2O3 in MMT. Removal of the impurities with sodium dithionite and citrate buffer makes Fe‐MEPE‐MMT available. Electrorheological measurements reveal for both nanocomposites a distinctive ER effect. The effect depends on the intercalated coordination polymer. Dielectric spectroscopy shows a different polarization for Fe‐MEPE‐MMT and Ni‐MEPE‐MMT.

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Section: Resultsmentioning

confidence: 99%

Intercalation of Nickel(II) and Iron(II) Metallosupramolecular Polyelectrolytes in Montmorillonite: Nanocomposites and their Electrorheological Properties

2015

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“…The HP 16452A fixture was immersed in the oil bath (silicone oil, −25.0 to +125.0 • C) to measure the temperature dependence of the dielectric properties. The dielectric parameters were obtained by the fit of the Cole-Cole equation, as shown in the following equation (1) [50].…”

Section: Methodsmentioning

confidence: 99%

Temperature effect of electrorheological fluids based on polyaniline derived carbonaceous nanotubes

Yin¹,

Xiang

et al. 2010

Smart Mater. Struct.

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Nitrogen-enriched carbonaceous nanotubes (N-CTs) were prepared by the carbonization of polyaniline (PANI) nanotubes in vacuum and were demonstrated to possess good electrorheological (ER) performance. In this paper, the temperature dependence of the ER properties of the suspension composed of N-CTs in silicone oil was systematically investigated by steady shear viscosity and dynamic viscoelastic measurements. These showed that under electric fields the N-CT suspension showed good temperature stability of its ER properties though its zero-field viscosity decreased with elevated temperatures. Meanwhile, the flow curve of shear stress versus shear rate also maintained a stable level and the critical shear rate shifted towards high values as the operating temperature increased. The dynamic viscoelastic measurement showed that the storage modulus slightly increased with increasing operating temperature, also confirming the good temperature stability of the ER properties of the N-CT suspension. The dielectric spectra of the N-CT suspension and the dielectric parameters calculated by the Cole-Cole equation could explain the temperature dependence of the ER properties of the N-CT suspension.

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“…The set of data given and fitted in Cole-Cole plot of e 0 versus e 00 is shown in Table 1. The achievable polarizability (e 0 À e 1 ) is related with the yield stress and stress enhancement under an applied electric field [26,27]. As can be seen from Figs.…”

Section: Resultsmentioning

confidence: 96%

β Dielectric relaxation mode in side-chain liquid crystalline polymer film

Okutan¹,

Şentürk²

2008

Journal of Non-Crystalline Solids

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Comment on ‘Giant electrorheological activity of high surface area mesoporous cerium-doped TiO2 templated by block copolymer’

Cited by 11 publications

References 7 publications

Intercalation of Nickel(II) and Iron(II) Metallosupramolecular Polyelectrolytes in Montmorillonite: Nanocomposites and their Electrorheological Properties

Intercalation of Nickel(II) and Iron(II) Metallosupramolecular Polyelectrolytes in Montmorillonite: Nanocomposites and their Electrorheological Properties

Temperature effect of electrorheological fluids based on polyaniline derived carbonaceous nanotubes

β Dielectric relaxation mode in side-chain liquid crystalline polymer film

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