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Resonance disintegration produces ultrafine carbon products from pyrolysis char for use in printing inks / Timothy Karpetsky in PAINTINDIA, Vol. LI, N° 12 (12/2001)
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Titre : Resonance disintegration produces ultrafine carbon products from pyrolysis char for use in printing inks Type de document : texte imprimé Auteurs : Timothy Karpetsky, Auteur Année de publication : 2001 Article en page(s) : p. 73-79 Note générale : Bibliogr. Langues : Anglais (eng) Tags : Résonance 'Onde choc' Désintégration Pneumatique 'Déchet caoutchouc' 'Poudre ultrafine' Pyrolyse Semicoke Préparation 'Noir carbone' 'Pigment minéral' Encre Index. décimale : 667.9 Revêtements et enduits Résumé : Low temperature pyrolysis of shredded automobile tires yields char consisting of carbon particles. This coarse granular material must be size-reduced to be of commercial interest. Traditional milling and grinding techniques have been tried without success. However, a new efficient and inexpensive method, resonance disintegration, consistently converts char to ultrafine carbon products in production rates of one ton per hour. During resonance disintegration, char granules experience multiple high-energy shock waves, resulting in the immediate production of carbon having an average primary particle diameter of 38 nanometers in aggregates and agglomerates ranging in size from 100 nanometers to 10 microns. Over 70% of the carbon particulate volume is below one micron when dispersed in water. Very rapid surface treatment of particulates can be accomplished, as coarse material is size-reduced using resonance disintegration. The uses of these new carbon products as black pigments in printing inks are also described. Note de contenu : PYROLYTIC CHAR
RESONANCE DISINTEGRATION (RD)
RESONANCE DISINTEGRATION OF CARBON BLACK AND PYROLYTIC CHAR : Particle size distribution - Pyrolytic char
MORPHOLOGY OF PYROLYTIC CHAR BEFORE AND AFTER RESONANCE DISINTEGRATION
PHYSICAL PROPERTIES OF CHAR AFTER RESONANCE DISINTEGRATIONPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12647
in PAINTINDIA > Vol. LI, N° 12 (12/2001) . - p. 73-79[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 001273 - Périodique Bibliothèque principale Documentaires Disponible Nano-titania as UV blockers in stains / Bernard Pacaud in EUROPEAN COATINGS JOURNAL (ECJ), N° 11/98 (11/1998)
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Titre : Nano-titania as UV blockers in stains Type de document : texte imprimé Auteurs : Bernard Pacaud, Auteur ; Jean-Noël Bousseau, Auteur ; Jacques Lemaire, Auteur Année de publication : 1998 Article en page(s) : p. 842-848 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Matériau revêtement' Lasure Adjuvant 'Absorbant UV' 'Titane Oxyde' 'Particule ultrafine' TiO2 Index. décimale : 667.9 Revêtements et enduits Résumé : This article demonstrates that for the nano-TiO2 particles the authors have developed, stains can be loaded up to about 5% without significantly altering the transparency. This level is also sufficient to attain a good UV filter effect. For both alkyd and acrylic stains, at a level of 5% nano-TiO2 wood grays more slowly than with a UV absorber, and the products can be expected to last much longer.To describe resin degradation caused by the direct photochemical activity of the resin and by TiO2-induced photocatalysis, the authors have developed a simple model which is given in the appendix.
Once the various constants of the mathematical model had been determined, the model was tested to see how well it would predict the impact of the nano-TiO2 level, the photocatalytic activity of the nano-TiO2 and the properties of the resin.Note de contenu : - Description of experimental techniques : Stain formulations - Preparation of fee film stains and coating of wood panels - Photocatalytic activity of nano-TiO2 - Spectrophotometric characterization - Ageing experiments - Measurement of film photo-oxidation rate
- Problems encountered with organic UV absorbers and search for a substitute : Degradation of organic UV-absorbers - Nano-TiO2 grades
- Assessment of application of nano-TiO2 in stains : Transparency and UV filter effect - Infrared monitoring of resin degradation - Monitoring by oxygen consumption - Change in color and aspect of wood during exposure of stain-coated wood panels to QUVAPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11153
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 11/98 (11/1998) . - p. 842-848[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 000598 - Périodique Bibliothèque principale Documentaires Disponible