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Wettability study for pigmentary titanium dioxide / R. T. Abrahao in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 6 (11/2013)
[article]
Titre : Wettability study for pigmentary titanium dioxide Type de document : texte imprimé Auteurs : R. T. Abrahao, Auteur ; V. Postal, Auteur ; J. L. Paiva, Auteur ; R. Guardani, Auteur Année de publication : 2013 Article en page(s) : p. 829-840 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Dispersions et suspensions
Mouillabilité
Mouillage (chimie des surfaces)
Pigments inorganiques
PoudresIndex. décimale : 667.2 Colorants et pigments Résumé : Wetting is the first step in the dispersion process of any powder. Understanding how the powder surface and the liquid properties affect the speed and intensity of the wetting process provides a set of tools to determine the dispersion efficiency as a whole, and an effective dispersion allows the reduced use of the powder to achieve the specified final properties. This article reports experimental results on the wetting behavior of five different TiO2 samples by liquids with different values of surface tension [deionized (DI) water and DI water containing surfactants] and its effect on the dispersion process. The selection of the TiO2 samples was based on different particles sizes with similar surface properties, and similar sizes with different surface properties. The samples were characterized in terms of their specific surface area and particle size distribution. The wetting behavior was evaluated by a capillary rise technique (Washburn) to measure liquid penetration height and rate, and the time evolution of the particle size distribution. The results show that larger particles presented faster wettability and that liquids with lower surface tension facilitate the wetting of the powder. The energy required to deagglomerate the powder is inversely proportional to the wetting speed: the faster the wetting the easier it will be to disperse the particles, with less energy required. DOI : 10.1007/s11998-013-9530-2 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-013-9530-2.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19822
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 10, N° 6 (11/2013) . - p. 829-840[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 15744 - Périodique Bibliothèque principale Documentaires Disponible Wetting additive for water based pressure sensitive adhesives / Gerald Marinzulich in ADHESION - ADHESIVES + SEALANTS, N° 9/2005 (09/2005)
[article]
Titre : Wetting additive for water based pressure sensitive adhesives Type de document : texte imprimé Auteurs : Gerald Marinzulich, Auteur Année de publication : 2005 Article en page(s) : p. 20-23 Langues : Multilingue (mul) Catégories : Adhésifs -- Additifs
Adhésifs en phase aqueuse
Adhésifs sensibles à la pression
Agents mouillants
Antimousse
Essais de pelage
Essais dynamiques
Mouillage (chimie des surfaces)Index. décimale : 668.3 Adhésifs et produits semblables Résumé : For aqueous adhesives, complete substrate wetting is critical to obtaining a strong adhesive bond. Reducing the surface tension is necessary to obtain complete wetting of many difficult or contaminated substrates. An anionic wetting additive is available that is easily incorporated into water based pressure sensitive adhesive systems. Use of it improves the properties of acrylic and vinyl-acrylic adhesive systems. Note de contenu : - Wetting additive
- Defoamer
- Peel strength testsEn ligne : https://drive.google.com/file/d/1oqWgMVJkua0nDBl6cdsSyBYeLdL1PK8Z/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25496
in ADHESION - ADHESIVES + SEALANTS > N° 9/2005 (09/2005) . - p. 20-23[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 13504 - Périodique Bibliothèque principale Documentaires Disponible A wetting and dispersing additives concept / Carsten Nagel in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 200, N° 4548 (05/2010)
[article]
Titre : A wetting and dispersing additives concept Type de document : texte imprimé Auteurs : Carsten Nagel, Auteur Année de publication : 2010 Article en page(s) : p. 30-31 Langues : Anglais (eng) Catégories : Additifs
Dispersions et suspensions
Epoxydes
Mouillage (chimie des surfaces)
Pigments inorganiques
Polyalkydes
Revêtements:Peinture
Stabilisants (chimie)Index. décimale : 667.9 Revêtements et enduits Résumé : Concept for aqueous systems that ensures stabilisation of inorganic pigments. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10065
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 200, N° 4548 (05/2010) . - p. 30-31[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 012361 - Périodique Bibliothèque principale Documentaires Disponible Wetting behavior of the shear thinning power law fluids / Sima Didari in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 11, N° 1 (01/2014)
[article]
Titre : Wetting behavior of the shear thinning power law fluids Type de document : texte imprimé Auteurs : Sima Didari, Auteur ; Zakaria Y. Ahmad, Auteur ; James D. Veldhorst, Auteur ; Tequila A. L. Harris, Auteur Année de publication : 2014 Article en page(s) : p. 95-102 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Angle de contact
Cisaillement (mécanique)
Enduction par filière
Fluides, Mécanique des
Mouillage (chimie des surfaces)
RhéologieIndex. décimale : 667.9 Revêtements et enduits Résumé : The knowledge of the wetting characteristics of a coating solution is a prerequisite of assuring the final quality of thin films manufactured by the slot die coating process. Because the maximum coating speed is limited by defects, such as air entrainment, which are directly related to film quality, an understanding of the coating limits is critical. Despite the existence of a vast body of literature to understand the occurrence of defects and the coating limits to produce defect-free films, the mechanism of air entrainment is still not well understood, especially for various classes of solutions. In this study, the shape of the upstream meniscus of a mildly shear thinning non-Newtonian coating bead has been studied both numerically and experimentally and subsequently linked to the air entrainment threshold. It has been found that the dynamic contact angle reaches its maximum value at the air entrainment threshold, primarily as a function of the capillary number. In addition, this work suggests that the onset of the dripping and air entrainment boundaries of solutions that follow the power law can be predicted based on the dynamic contact angle as a function of the consistency and power law indices. DOI : 10.1007/s11998-013-9503-5 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-013-9503-5.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=20621
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Code-barres Cote Support Localisation Section Disponibilité 16023 - Périodique Bibliothèque principale Documentaires Disponible Wetting metamorphosis of hydrophobic fluoropolymer coatings submerged in water and ultrasonically vibrated / Matthew Trapuzzano in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 3 (05-06/2020)
[article]
Titre : Wetting metamorphosis of hydrophobic fluoropolymer coatings submerged in water and ultrasonically vibrated Type de document : texte imprimé Auteurs : Matthew Trapuzzano, Auteur ; Nathan B. Crane, Auteur ; Rasim Guldiken, Auteur ; Andrés Tejada-Martinez, Auteur Année de publication : 2020 Article en page(s) : p. 633–642 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Angle de contact
Caractérisation
Fluoropolymères
Hydrophobie
HystérésisL'hystérésis (ou hystérèse) et signifiant "après" ou "plus tard", est la propriété d'un système qui tend à demeurer dans un certain état quand la cause extérieure qui a produit le changement d'état a cessé.
Immersion
Mouillage (chimie des surfaces)
Revêtements organiques
Traitement thermique
UltrasonsIndex. décimale : 667.9 Revêtements et enduits Résumé : Many important processes—from the manufacturing of integrated circuit boards to an insect’s ability to walk on water—depend on the wetting of liquids on surfaces. Wetting is commonly controlled through material selection, coatings, and/or surface texture. However, wetting is sensitive to environmental conditions. In particular, some hydrophobic fluoropolymer coatings are sensitive to extended water exposure as evidenced by a declining contact angle and increasing contact angle hysteresis. Understanding “degradation” of these coatings is critical to applications that deploy them. The durability of a series of fluoropolymer coatings was tested by measuring the water contact angle before, during, and after extended submersion of coated glass slides in a deionized water bath. Vibration was introduced as a potential method for expediting the effects of long-term water exposure, so similar measurements were taken before, during, and after the same coatings were subject to ultrasonic vibration while covered in deionized water. Both methods caused changes in advancing and receding contact angles, but degradation rates of vibrated coatings were significantly increased. Prolonged soaking caused significant decreases in the contact angle of most of the samples, though most experienced significant recovery of hydrophobicity when heat-treated at 160°C after submersion. Some coatings appeared noticeably more resistant to degradation by one or both methods. FluoroSyl showed no clear change under submersion, while other coatings experienced significant contact angle change. Degradation of vibrated coatings was also inconsistent among coatings and was not simply an acceleration of the degradation resulting from submerging coatings in water. This was apparent as some coatings were affected by one method but not the other. Atomic force microscopy was utilized to characterize the surface roughness of the coatings and revealed differing surface effects for different coatings after submersion and heat treatment. However, the magnitude of this roughness change was insufficient to fully explain the wetting changes. The rate of contact angle degradation was not altered significantly for coatings that were vibrated with acceleration magnitudes between 700 and 7000 g. Note de contenu : - Submersion of coatings
- Heat treatment of submerged coatings
- Comparison of ultrasonically vibrated wet coatingsDOI : https://doi.org/10.1007/s11998-019-00250-1 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-019-00250-1.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34095
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Code-barres Cote Support Localisation Section Disponibilité 21734 - Périodique Bibliothèque principale Documentaires Disponible Permalink