Intercalated conducting polyaniline–clay nanocomposites and their electrical characteristics

Song, Dong Hyun; Lee, Hyung Min; Lee, Kiho; Choi, Hyoung Jin

doi:10.1016/j.jpcs.2007.10.055

Cited by 24 publications

(11 citation statements)

References 6 publications

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“…In order to reduce the conductivity it was proposed to coat polyaniline on inorganic particles or insulating polymer. (Choi et al, 2001;Lim et al, 2002 andSong et al, 2008) prepared PAni/Clay composites, which presented irregular morphology and better ER effect. We have used as a support for PANI a kind of clay called sepiolite which is a clay composed of hydrated magnesium silicates.…”

Section: Ii-use Of Coated Fibers In Electrorheological Fluidsmentioning

confidence: 99%

Functionalized microfibers for field-responsive materials and biological applications

Bossis

Marins

Kuzhir

et al. 2015

Journal of Intelligent Material Systems and Structures

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International audienceElectrorheological (ER) and Magnetorheological (MR) are suspensions of micro or nanoparticles which can be easily polarized by the application of respectively an electric or a magnetic field.The dipolar interaction between the particles make them to aggregate in a solid network which gives to the suspension the properties of a solid. The main characteristic of this solid state is its yield stress which can reach quite easily 50kPa with MR fluids and usually only a few kPz for ER fluids, expect for a given class called giant electrorheological fluids (GER) which can overcome 100kPa although the reproducibility and practical use of these new fluids is still under test. Conventional ER and MR fluids are made of micronic or slightly submicronic spherical particles and ,due to their size they sediment quite quickly and can definitively remain aggregated in the absence of remixing during a long period. These last years it was found that fiber like particles can present two main advantages on spherical ones: a higher yield stress for the same volume fraction and applied field and a much lower sedimentation rate (reason for a lower sedimentation rate stands in the formation of a percolated network at low volume fraction which is strong enough to prevent its compaction. On the other hand the fact that the yield stress of a field induced network made of fibers is much lager than the one made of spheres has no clear explanation. A possible one could be related to the rôle of friction since the deformation of a network of fibers will involve the sliding of fibers along each other. A theoretical approach of this sliding friction was previousl

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Section: Ii-use Of Coated Fibers In Electrorheological Fluidsmentioning

confidence: 99%

Functionalized microfibers for field-responsive materials and biological applications

Bossis

Marins

Kuzhir

et al. 2015

Journal of Intelligent Material Systems and Structures

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“…Intercalated and/or exfoliated nanocomposites can be prepared by intercalation polymerization depending on the monomer/clay ratio. In the past, PANI/Clay nanocomposites were synthesized by emulsion intercalation [17][18][19], electrochemical [20,21], inverse emulsion polymerization [22], in situ intercalation [23][24][25][26][27], and mechanochemical intercalation method [28,29]. A higher intercalation level of PANI inside the clay gallery was achieved when the clay was chemically modified by various organic molecules before the polymerization [30,31].…”

Section: Introductionmentioning

confidence: 99%

New poly(o-phenylenediamine)/modified-clay nanocomposites: A study on spectral, thermal, morphological and electrochemical characteristics

Khelifa

Belmokhtar

Berenguer

et al. 2019

Journal of Molecular Structure

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This work describes the synthesis and characterization of new poly(o-phenylenediamine (PoPD)/modified-clay nanocomposite materials. For the synthesis, the raw clay (named as Mag) used in this study was from Maghnia (west Algeria), (Mag) clay was ion-exchanged with cobalt(II) sulfate hydrate and copper sulfate. The modified-clays were then dispersed in a oPD monomer-containing acidic solution to carry out in-situ intercalative oxidative polymerization by ammonium persulfate. XRF and XRD characterization reveal the success of ion-exchange to form highly intercalated Mag-Co and Mag-Cu clays. After polymerization, the disappearance of the interlayer-spacing diffraction peak for the PoPD-Mag-Cu and PoPD-Mag-Co nanocomposites points out fully exfoliation of the clay structure. The formation of intercalated PoPD into modified-clay nanocomposites was confirmed by XRD, TEM, TG analysis, FTIR spectroscopy and UV-vis studies. The nanocomposites show optical properties and the redox processes observed by cyclic voltammetry indicate that the reported polymerization into modified-clays leads to electroactive hybrid materials. All these properties make these polymer/clay nanocomposites attractive materials for multiple applications.

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“…Recent studies are focused on the electrorheological (ER) properties of pure polymers, 12,13 inorganic- or organic-based composites, 14,15 semiconducting polymers, 16 – 18 and their composites and/or nanocomposites. 19 – 21 Good ER performances are reported for PAn and its derivatives, 22 – 24 polypyrrole, 25 and their copolymers. 12,26…”

Section: Introductionmentioning

confidence: 98%

Electrorheological properties of polyaniline/K-feldspar conducting composite

Erol

Karakışla

Ünal

et al. 2012

Journal of Composite Materials

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In this study, synthesis of conducting polyaniline (PAn)/potassium-feldspar (K-feldspar) composites, having various amounts of PAn, was carried out using (NH4)2S2O8 as oxidizing agent. The conducting composites were characterized by a series of techniques namely: Fourier transform–infrared, X-ray diffraction, scanning electron microscopy, thermogravimetry analysis, two-probe conductivity, magnetic susceptibility, and particle size measurements. For electrorheological (ER) measurements, the conductivities of the composites were reduced by a dedoping process. A series of suspensions were prepared in silicone oil, having various volume fractions, and then subjected to colloidal stability, flow rate, ER and creep-recovery tests. Enhancement in the electric field-induced viscosities and shear thinning non-Newtonian viscoelastic behavior was observed for all the composite materials studied. Recoverable viscoelastic deformations were detected from the creep and creep-recovery tests under externally applied electric field thus; they were classified as smart materials.

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Intercalated conducting polyaniline–clay nanocomposites and their electrical characteristics

Cited by 24 publications

References 6 publications

Functionalized microfibers for field-responsive materials and biological applications

Functionalized microfibers for field-responsive materials and biological applications

New poly(o-phenylenediamine)/modified-clay nanocomposites: A study on spectral, thermal, morphological and electrochemical characteristics

Electrorheological properties of polyaniline/K-feldspar conducting composite

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