Electrorheological property of a polyaniline-coated silica suspension

Kuramoto, Noriyuki; Yamazaki, Mitsuo; Nagai, Katsutoshi; Koyama, Kiyohito; Tanaka, Katsufumi; Yatsuzuka, K.; Higashiyama, Yoshio

doi:10.1016/0040-6090(94)90845-1

Cited by 42 publications

(18 citation statements)

References 6 publications

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“…In addition, the surfaces became more regular as their particle size increased. Note that previously observed surfaces of PANI-coated silica particles 90 and PANI-coated polystyrene latexes 91 were irregular. The thickness of the PANI coating in the PAPMMAs was calculated using the second plateau observed in thermograms at 400 o C with the assumption that all particles were of the same thickness with perfect coating.…”

Section: Introductionmentioning

confidence: 92%

Electrorheologically intelligent polyaniline and its composites

2010

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Electrorheological (ER) fluids are generally composed of electrically polarizable inorganic or organic particles dispersed in insulating oils. These materials are intelligent/smart materials in that they are capable of changing their state from liquid-like to solid-like very quickly under an applied electric field. This feature article reviews the literature regarding the fabrication of conducting polyaniline (PANI) and PANI composite particles, their ER performance, as well as their chemical and physical characteristics of morphology and crystal structure. The ER behavior of these intelligent materials was also analyzed using a range of rheological equations of state and their dielectric properties.

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Section: Introductionmentioning

confidence: 92%

Electrorheologically intelligent polyaniline and its composites

2010

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“…Many other template morphologies have also been tested: carbon nanotubes [33], polymer fibers and textiles [21,34,35], membranes [36,37], polymer microspheres [38,39], natural particulate materials, like wood sawdust [19], and others have been coated with PANI. The powders of inorganic oxides, like silicon dioxide [40,41], titanium dioxide [42], copper(II) oxide [43], and ferrites [44], may serve as examples of another group of materials which have been modified on the surface with PANI. Special attention has been paid to montmorillonite and related clays [45][46][47][48].…”

Section: Introductionmentioning

confidence: 99%

Polyaniline: Thin films and colloidal dispersions (IUPAC Technical Report)

Stejskal

Sapurina

2005

Pure and Applied Chemistry

230

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Several workers from various institutions in six countries have prepared thin films and colloidal polyaniline dispersions. The films were produced in situ on glass supports during the oxidation of anilinium chloride with ammonium peroxydisulfate in water. The average thickness of the films, assessed by optical absorption, was 125 ± 9 nm, and the conductivity of films was 2.6 ± 0.7 S cm–1. Films prepared in 1 mol l–1 HCl had a similar thickness, 109 ± 10 nm, but a higher conductivity, 18.8 ± 7.1 S cm–1. Colloidal polyaniline particles stabilized with a water-soluble polymer, poly(N-vinylpyrrolidone) [poly(1-vinylpyrrolidin-2-one)], have been prepared by dispersion polymerization. The average particle size, 241 ± 50 nm, and polydispersity, 0.26 ± 0.12, have been determined by dynamic light scattering. The preparation of these two supramolecular polyaniline forms was found to be well reproducible.

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“…Anhydrous ER fluids based on composite particles were also reported. [33][34][35] For a favorable level of induced stress, a series of surface-modified particles of sulfonated poly(styrene-co-divinyl benzene)s was developed by Asako et al 36 Recently, a suspension based on dry titanium dioxide (TiO 2 ) nano-particles has been reported by Tanaka et al 37 The suspended particles were remarkably stable against sedimentation and electrical breakdown. The nano-suspension also showed a good fluidity with a gap of 50 mm.…”

Section: Methodsmentioning

confidence: 99%