Shell morphology of core-shell latexes based on conductive polymers

Huijs, FM; Vercauteren, F.F.; Ruiter, B. de; Kalicharan, D.; Hadziioannou, G

doi:10.1016/s0379-6779(98)01444-1

Cited by 34 publications

(23 citation statements)

References 2 publications

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“…[12,13] We suggest the following explanation for these findings: the polyelectrolyte chains situated at the surface of the PS core collapse upon the addition of multivalent counterions, such as Fe 3þ , a well-known effect in the polyelectrolyte literature. [18] As a consequence the loaded PPy forms clusters in the PSS shell because of the incompatibility of the two polymers.…”

mentioning

confidence: 81%

“…the Supporting Information). [13] The signals of the ethyl groups of the ester at d ¼ 67 ppm (-O-CH 2 -) and 15 ppm (-O-CH 2 -CH 3 ) were absent in the hydrolyzed products. A dispersion of pure PS-PSS core-shell nanoparticle was obtained by chromatography through an anion exchange resin followed by ultrafiltration in order to remove surfactants and impurities of low molecular weight.…”

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confidence: 95%

“…[5,7,8] Latex particles coated by conducting polymer were first reported in 1987, [9] and this approach has found widespread attention. [10][11][12][13] The logic of earlier approaches was to create a core of a thermoplastic polymer which would undergo film formation as in typical surfactant stabilized latices by coalescence under the action of heat and/or induced by solvent swelling. The conducting polymers placed at the surface of the individual particles would then become dispersed in these films where they form an electrical percolating structure given that their volume concentration and morphology had been appropriately optimized.…”

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confidence: 99%

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Construction of Redispersible Polypyrrole Core–Shell Nanoparticles for Application in Polymer Electronics

et al. 2009

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Redispersible conductive core–shell nanoparticles with a polystyrene core and a polystyrene sulfonate shell loaded with polypyrrole (PPy) are constructed. The smooth conducting thin films assembled from the PPy core–shell nanoparticles show high transmittance in the visible range and adequate adhesion to the substrates. Performance of light‐emitting devices with the conducting thin film as the hole injection layer is tested and compared with the one based on PEDOT/PSS.

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confidence: 81%

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confidence: 95%

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confidence: 99%

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Construction of Redispersible Polypyrrole Core–Shell Nanoparticles for Application in Polymer Electronics

et al. 2009

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“…Dispersity related problems of the ICPs are resolved in the course of coating preparation by following the approach of small carriers supported polymers [13]. These nano-size range particle supported ICPs allow to obtain highly dispersed composites [14][15][16] with greatly enhanced barrier properties [17,18]. The highly dispersed particles [15,14,19] feature increased conductivity and processibility [20] with improved corrosion protection ability [21].…”

Section: Introductionmentioning

confidence: 99%

Corrosion protection with zinc-rich epoxy paint coatings embedded with various amounts of highly dispersed polypyrrole-deposited alumina monohydrate particles

Gergely

Bertóti

Törók

et al. 2013

Progress in Organic Coatings

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Active anodic zinc content below 90 wt.% does not support sufficient electrical contacts but higher contents cause high porosity of traditional liquid zinc-rich paints (ZRPs). To resolve this problem, our proposal is the application of highly dispersed polypyrrole (PPy) coated alumina inhibitor particles (PCAIPs) in zinc-rich paint compositions. Using these nano-size inhibitor particles at concentrations from 4.55 to 0.85 wt.%, hybrid paints were formulated with zinc contents ranging from 60 to 85 wt.% at the same time. Submicron morphology and nano-scale structure, spectroscopy characteristics and electrochemical properties of the PCAIPs were studied by transmission electron microscopy (TEM) and rheology, Fourier-transform infrared spectroscopy (FT-IR) and cyclic voltammetry (CV) in first part of the work. In the second part, electrolytic corrosion resistivity of two sets of paint coatings were salt-spray chamber and immersion tested with 5 wt.% aqueous solution of sodium chloride. Active corrosion prevention ability of the saltspray tested coatings was evaluated in compliance with ISO recommendations. Dielectric properties of the coatings during the immersion tests were monitored by electrochemical impedance spectroscopy (EIS). Corrosion tested area of the coatings was investigated by glowdischarge optical emission spectroscopy (GD-OES) to disclose infiltration of corrosive analytes and oxygen enrichment in the cross-section of the primers in comparison with their pristine states. Morphology of the zinc pigments was examined by scanning electron microscopy (SEM), and quality of steel specimens and the interfacial binder residues by X-ray photoelectron spectroscopy (XPS) as well as FT-Raman and Mössbauer spectroscopy. The results of both types of corrosion tests evidenced efficient utilisation of sacrificial anodic current for galvanic protection and improved barrier profile of the hybrid coatings, along with the PCAIP inhibited moderate selfcorrosion of zinc. As a result of well balanced active/passive function, the hybrid coating 2 containing zinc at 80 wt.% and PCAIPs at 1.75 wt.% embedding PPy at 0.056 wt.% indicated the most advanced corrosion prevention. Galvanic function of the hybrid paints is interpreted on the basis of size-range effect and spatial distribution of the alumina supported PPy inhibitor particles and basic electrical percolation model considerations.

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“…However, epoxy resins are electrical insulators. In order to dissipate electrostatic charges to achieve materials with antistatic properties, conducting particles, such as intrinsic conducting polymers, [2][3][4][5] or fibers, [6,7] or carbon nanotubes, [8][9][10][11][12][13][14][15] or inorganic nanoparticles [16][17][18][19] are dispersed in the epoxy resin matrix. Conducting filler-insulating polymer composites become conductors when the filler content reaches a critical value, or threshold percolation, characterized by a sharp increase of the electrical conductivity.…”

Section: Introductionmentioning

confidence: 99%

Glass Transition Temperature Depression at the Percolation Threshold in Carbon Nanotube–Epoxy Resin and Polypyrrole–Epoxy Resin Composites

Barrau

Demont

Maraval

et al. 2005

Macromol. Rapid Commun.

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Summary: The glass transition temperatures of conducting composites, obtained by blending carbon nanotubes (CNTs) or polypyrrole (PPy) particles with epoxy resin, were investigated by using both differential scanning calorimetry (DSC) and dynamical mechanical thermal analysis (DMTA). For both composites, dc and ac conductivity measurements revealed an electrical percolation threshold at which the glass transition temperature and mechanical modulus of the composites pass through a minimum.

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Shell morphology of core-shell latexes based on conductive polymers

Cited by 34 publications

References 2 publications

Construction of Redispersible Polypyrrole Core–Shell Nanoparticles for Application in Polymer Electronics

Construction of Redispersible Polypyrrole Core–Shell Nanoparticles for Application in Polymer Electronics

Corrosion protection with zinc-rich epoxy paint coatings embedded with various amounts of highly dispersed polypyrrole-deposited alumina monohydrate particles

Glass Transition Temperature Depression at the Percolation Threshold in Carbon Nanotube–Epoxy Resin and Polypyrrole–Epoxy Resin Composites

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