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The best for red and yellow- A new additive technology for waterborne iron oxide pigment concentrates / Frank Kleinsteinberg in PAINTINDIA, Vol. LXX, N° 9 (09/2020)
[article]
Titre : The best for red and yellow- A new additive technology for waterborne iron oxide pigment concentrates Type de document : texte imprimé Auteurs : Frank Kleinsteinberg, Auteur ; Markus Vogel, Auteur Année de publication : 2020 Article en page(s) : p. 96-100 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Dispersions et suspensions
Formulation (Génie chimique)
Granulométrie
Jaune
Lumière -- Diffusion
Opacifiants
Oxyde de fer
Pigments inorganiques
Potentiel zeta
Revêtements décoratifs:Peinture décorative
Rouge (couleur)
Taille des particules
ViscositéIndex. décimale : 667.9 Revêtements et enduits Résumé : In decorative coatings, the use of pigment concentrates is a modern and flexible way to produce colored paints. Especially in waterborne applications, these concentrates have to be suitable for a broad range of different binder technologies. Because of that, the concentrate formulations are usually free of binders and feature a broad compatibility. Furthermore, the demands in terms of storage stability, color strength and cost efficiency are very high. These demands are addressed directly to the used additive technology. The additive has to induce outstanding viscosity reduction to achieve the highest pigment loads and the most economic grinding. It has to stabilize the pigments over a long period of time without any change in viscosity and it has to develop maximum color strength to avoid any waste of expensive pigments. Note de contenu : - Pigment concentrate technology
- Pigment dispersion process
- Electrostatic stabilization - Zeta potential
- Steric stabilization
- Discussion of the results
- Particle size and hiding power
- Viscosity and stability
- Zetal potential
- Fig. 1 : IHS — Chemical Economics Handbook — Inorganic color
pigments consumption of inorganic color pigments in 2014
- Fig. 2 : Relationship :Light scattering - particle size diameter
- Fig. 3 : Mechanisms of pigment stabilization
- Fig. 4 : Mode of electrostatic stabilization
- Fig. 5 : Interaction between pigment particles with and without additive
- Fig. 6 :Initial viscosities of the pigment concentrates
- Fig. 7 : Zeta potential - Iron oxide yellow zeta potential - PY 42
- Fig. 8 : Zeta potential - iron oxide red zeta potential - PR 101
- Fig. 9 : Stabilization of PY 42 requirements for a good stabilization PY 42
- Fig. 10 : Stabilization of PR 101
- Table 1 : Tested formulations
- Table 2 : Particle size and hiding powerEn ligne : https://drive.google.com/file/d/13OtDZPFJ2wwTzF9XSg8JoyUuUmU733V0/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34663
in PAINTINDIA > Vol. LXX, N° 9 (09/2020) . - p. 96-100[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22359 - Périodique Bibliothèque principale Documentaires Disponible The effect of carbon nanotubes loaded with 2-mercaptobenzothiazole in epoxy-based coatings / Kunal V. Yeole in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 1 (01/2016)
[article]
Titre : The effect of carbon nanotubes loaded with 2-mercaptobenzothiazole in epoxy-based coatings Type de document : texte imprimé Auteurs : Kunal V. Yeole, Auteur ; L. P. Agarwal, Auteur ; Shashank T. Mhaske, Auteur Année de publication : 2016 Article en page(s) : p. 31-40 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosion
Caractérisation
Couches minces multicouches
Diffractométrie de rayons X
Epoxydes
Essais (technologie)
Essais de brouillard salin
Fourier, Spectroscopie infrarouge à transformée de
Humidité -- Absorption:Eau -- Absorption
Mercaptobenzothiazole
Métaux -- Revêtements protecteurs
Morphologie (matériaux)
Nanotubes
Polarisation (lumière)
Polypyrroles
Potentiel zeta
Revêtements -- Analyse:Peinture -- Analyse
Taille des particules
ThermogravimétrieIndex. décimale : 667.9 Revêtements et enduits Résumé : Currently, anticorrosive coatings find a large number of applications and can be effectively used for corrosion protection of many corrosion-prone metals like aluminum, iron, etc. Nanocontainers have the ability to encapsulate large amounts of guest molecules within their core, and releasing them in a controlled way can aid in providing self-healing abilities to the coating, thus providing active protection. In the present study, a novel approach of synthesis of nanocontainers using carbon nanotubes (CNTs) and corrosion inhibitor 2-mercaptobenzothiazole has been discussed with their applications in corrosion protection of mild steel (MS). It is a three-step procedure involving layer-by-layer deposition of the CNT, inhibitor, and polyelectrolytes, which thus provides enhanced corrosion protection when coated on MS plates. The thickness of the layer, surface charge, and functional groups present on each layer were identified using various analytic techniques such as particle size distribution, zeta potential, and FTIR analysis. X-ray diffractograms analyses of CNT and modified CNT were performed to evaluate their crystallographic properties. The morphological and particle size clearly indicate the development of a nanocontainer. The corrosion rate analysis of nanocontainer-epoxy coatings on MS panel has been performed by means of salt spray and DC polarization measurements. The corrosion resistance was measured after the immersion of the coated samples in alkali solution. Note de contenu : - EXPERIMENTAL : Materials and reagent - Coating of polypyrrole layer on CNT - Loading of 2-mercaptobenzothiazole (MBT) - Coating of polyacrylic acid layer - Application in epoxy-based coatings
- CHARACTERIZATION
- RESULTS AND DISCUSSION : FTIR - XRD analysis - Morphological study - Thermogravimetric analysis - Particle size and zeta potential analysis - Release study of corrosion inhibitor at different pH values - Water absorption test - Salt spray test - DC polarization measurementDOI : 10.1007/s11998-015-9730-z En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9730-z.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25369
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 1 (01/2016) . - p. 31-40[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 17819 - Périodique Bibliothèque principale Documentaires Disponible The influence of chemical reaction conditions upon poly(styrene-methyl methacrylate-crylic acid) synthesis : Variations in nanoparticle size, colour and deposition methods / Rui D. V. Fernandes in COLORATION TECHNOLOGY, Vol. 136, N° 2 (04/2020)
[article]
Titre : The influence of chemical reaction conditions upon poly(styrene-methyl methacrylate-crylic acid) synthesis : Variations in nanoparticle size, colour and deposition methods Type de document : texte imprimé Auteurs : Rui D. V. Fernandes, Auteur ; Pedro Gomes, Auteur ; Andrea Zille, Auteur ; Antonio Pedro Souto, Auteur Année de publication : 2020 Article en page(s) : p. 101-109 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chimie textile
Copolymère styrène-méthacrylate de méthyle-acide crylique
Copolymères -- Synthèse
Latex
Lumière -- Diffusion
Polyamide 66
Polymérisation en émulsion
Potentiel zeta
Réactions chimiques
Textiles et tissusIndex. décimale : 667.3 Teinture et impression des tissus Résumé : Monodisperse latex nanospheres of poly(styrene-methyl methacrylate-acrylic acid) with different sizes were synthetised by soap-free emulsion copolymerisation and applied onto polyamide 6,6 fabrics by two methods, ie, gravitational sedimentation and dip-drawing. Different-sized nanospheres were synthetised by varying temperature and stirring velocity as reaction parameters. Scanning electron microscopy and scanning transmission electron microscopy were used to evaluate nanosphere sizes and deposition structures. The results showed two different nanosphere structural arrangements on the fabric surface, a hexagonal packed centre structure in the even surfaces and a square arrangement in the out-of-plane surfaces. Different colours were observed according to particle size, namely, violet (ca . 170 nm), blue (ca . 190 nm), green (ca . 210 nm), yellow (ca . 230 nm) and red (ca . 250 nm). An iridescence effect was also observed, displaying different colours at different observation angles. By controlling the size of the nanospheres it was possible to obtain different, brilliant and iridescent colours. Using different nanosphere sizes it was possible to obtain different interplanar distances and to control the light scattering in the crystalline lattice planes, obtaining Bragg diffraction patterns. Note de contenu : - Materials
- Preparation of monodisperse P(St-MMA-AA) composite nanospheres
- Fourier Transform-infrared spectroscopy with attenuated total reflectance
- Dynamic light scattering and zeta potential measurements
- Deposition of PCs by the dip-drawing method
- Scanning electron microscopy and scanning transmission microscopy
- Optical microscopy
- Diffuse reflectance spectroscopy
- Glossmeter analysis
- PhotographsDOI : https://doi.org/10.1111/cote.12452 Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34229
in COLORATION TECHNOLOGY > Vol. 136, N° 2 (04/2020) . - p. 101-109[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21751 - Périodique Bibliothèque principale Documentaires Disponible Tone in tone dyeing : attempt to use dye encapsulated silica nanospheres in leather dyeing / Sathya Ramalingam in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIII, N° 12 (12/2018)
[article]
Titre : Tone in tone dyeing : attempt to use dye encapsulated silica nanospheres in leather dyeing Type de document : texte imprimé Auteurs : Sathya Ramalingam, Auteur ; Jonnalagadda Raghava Rao, Auteur Année de publication : 2018 Article en page(s) : p. 400-408 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Colloides
Colorants
Colorimétrie
Cuirs et peaux -- Teinture
Encapsulation
Evaluation
Granulométrie
Microscopie électronique en transmission
Nanoparticules
Potentiel zeta
Résistance à l'abrasion
SiliceLa silice est la forme naturelle du dioxyde de silicium (SiO2) qui entre dans la composition de nombreux minéraux.
La silice existe à l'état libre sous différentes formes cristallines ou amorphes et à l'état combiné dans les silicates, les groupes SiO2 étant alors liés à d'autres atomes (Al : Aluminium, Fe : Fer, Mg : Magnésium, Ca : Calcium, Na : Sodium, K : Potassium...).
Les silicates sont les constituants principaux du manteau et de l'écorce terrestre. La silice libre est également très abondante dans la nature, sous forme de quartz, de calcédoine et de terre de diatomée. La silice représente 60,6 % de la masse de la croûte terrestre continentale.
Solidité de la couleur
Spectres d'absorptionIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : A commercial leather dye was encapsulated into silica by simple microemulsion technique and applied as dyeing agent in leather dyeing process. Comparative studies on the performance of free dye (non-encapsulated) towards encapsulated dye are evaluated. The resultant formation of nanospheres contain dye inside the silica matrix was investigated by UV-Visible, TEM (Transmission Electron Microscopy) and DLS (Dynamic Light Scattering) measurement. The confinement effect was identified by the formation of spherical particles of the silica through encapsulation. On whole the spectroscopic studies showed that the formed silica nanospheres are stable enough to utilize as dyeing agent in leather dyeing process. The performance of encapsulated nanospheres was evaluated by utilizing as dyeing agent for upper and garment leather processing. The dye entrapped inside the silica spheres had better affinity towards the leather as demonstrated by their uniform penetration throughout its cross section and its surface coloring. The dyeing properties of the encapsulated dye were appraised by color and fastness measurement. The results showed that the dyeing characteristics of the experimental leathers were greatly improved by using encapsulated dyes versus their control leathers. Hence the idea of supporting commercial dye on/inside polymeric silica substrate enriched the leather dyeing characteristics and provide the clue for any dye for any substrate.r Note de contenu : - MATERIALS AND METHODS : Synthesis of nanocolloids contain dye encapsulated silica nanospheres - Characterization of encapsulated dye containing silica nanospheres - Evaluation of encapsulated dyes in leather dyeing - Photograph of the leather surface and cross section - Measurement of reflectance of coloured leather - Fastness property of coloured leather - Analysis of permeability of leather - Softness measurement of coloured leather
- RESULTS AND DISCUSSIONS : Absorption spectra of dye - TEM - Particle size and zeta potential - Evaluation of encapsulated dye in leather dyeing process of upper and garment leathe rprocessing - Leather photograph - Color coordinates measurement of dyed leathers - Fastness against rub during wet and dry stage - Fullness and softness measurementEn ligne : https://drive.google.com/file/d/1iKvIdTTkBrYNwRlFhED6c4PR0CPC4V3M/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31400
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXIII, N° 12 (12/2018) . - p. 400-408[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20453 - Périodique Bibliothèque principale Documentaires Disponible Understanding the influence of concentration on the zeta potential measurement of TiO2 slurries / Malcolm Connah in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 201, N° 4562 (07/2011)
[article]
Titre : Understanding the influence of concentration on the zeta potential measurement of TiO2 slurries Type de document : texte imprimé Auteurs : Malcolm Connah, Auteur Année de publication : 2011 Article en page(s) : p. 34-35 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Dioxyde de titane
Electrophorèse
Mesures optiques
Potentiel zeta
RevêtementsIndex. décimale : 667.9 Revêtements et enduits Résumé : Zeta potential measurements traditionally rely on forward angle light scattering techniques, making it difficult to measure at high concentrations, since these solutions are normally turbid, wich restrict light transmission.
Widely used as a white pigment, titanium dioxide (TiO2) suspensions must remain stable to be of value since aggregation affects a number of physical properties.
One of the key parameters influencing the dispersion stability of such suspensions is zeta potential, a property that can be measured using electrophoretic light scattering techniques (laser Doppler electrophoresis). As a consequence of possessing a high refractive index, however, TiO2 is particularly turbid at even moderate concentrations. This means that industries working with TiO2 slurries and other turbid suspensions have found it difficult to use modern light scattering instruments for zeta potential measurement. Now, the introduction of a high concentration zeta potential cell has opened the door to using laser Doppler electrophoresis to measure the zeta potential of samples with concentrations up to three times greater than previously possible.Note de contenu : - A problem of clarity
- Studying the influence of concentration
- Clarifying turbid measurements
- A transparent conclusionEn ligne : https://drive.google.com/file/d/1lSvbSblhabc4b_Vb2AEAcqY8EZjZQAbk/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12261
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 201, N° 4562 (07/2011) . - p. 34-35[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 013224 - Périodique Bibliothèque principale Documentaires Disponible Understanding the links between rheology and particle parameters / A. Hill in SURFACE COATINGS INTERNATIONAL, Vol. 93, 4 (08/2010)
PermalinkWet coating of calcite with silica nanoparticles in CO2 environment / Qitong Liu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 1 (01/2024)
PermalinkPermalinkZeta potential of pigments and fillers / Jochen Winkler in EUROPEAN COATINGS JOURNAL (ECJ), N° 1-2/97 (01-02/1997)
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