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Micronised synthetic silica gels : High performance matting agents for surface coatings / David J. Kent in PAINTINDIA, Vol. LII, N° 11 (11/2002)
[article]
Titre : Micronised synthetic silica gels : High performance matting agents for surface coatings Type de document : texte imprimé Auteurs : David J. Kent, Auteur Année de publication : 2002 Article en page(s) : p. 75-81 Langues : Anglais (eng) Tags : 'Agent matant' 'Traitement surface' 'Dimension particule' Porosité 'Mécanisme action' Micronisation 'Gel silice' Adjuvant Formulation Peinture 'Matériau revêtement'; Index. décimale : 667.9 Revêtements et enduits Résumé : Micronised synthetic silicas are widely used to create matt effects in surface coatings of all kinds. Their unique physical properties make them ideally suited to the purpose of creating the microroughness necessary for gloss reduction and stable under a wide range of processing conditions. At the same time, their chemical nature renders them compatible with all coatings materials.
The most recent developments in silica gel technology are described and the features and benefits of the resulting products, which provide controllable and reproducible performance in a wide variety of coating systems, are highlighted.Note de contenu : - Mechanism of matting
- The "ideal" base material
- Silica gel technology : Features and benefits : - Porosity : the key to high efficiency - Particle size control : optimum gloss reduction and surface smoothness
- Surface modification : Stability and compatibility
- Advances in silica gel matting agentsPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12427
in PAINTINDIA > Vol. LII, N° 11 (11/2002) . - p. 75-81[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 001287 - Périodique Bibliothèque principale Documentaires Disponible The utilization of specific interactions to enhance the mechanical properties of polysiloxane coatings / Partha Majumdar in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 7, N° 2 (03/2010)
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Titre : The utilization of specific interactions to enhance the mechanical properties of polysiloxane coatings Type de document : texte imprimé Auteurs : Partha Majumdar, Auteur ; Bret A. Mayo, Auteur ; Jongsoo Kim, Auteur ; Christy Gallagher-Lein, Auteur ; Elizabeth Lee, Auteur ; Nathan Gubbins, Auteur ; Bret J. Chisholm, Auteur Année de publication : 2010 Article en page(s) : p. 239-252 Note générale : Bibliogr. Langues : Américain (ame) Tags : 'Revêtements polysiloxanes' 'Sels ammonium quaternaire''Nanoparticules silice' 'Propriétés mécaniques' 'Spectroscopie annihilation positron' Index. décimale : 667.9 Revêtements et enduits Résumé : Moisture-curable polysiloxanes were modified with ionic groups to enable specific interactions between the polysiloxane matrix and silica nanoparticle reinforcement. A trimethoxysilane-functional quaternary ammonium salt (QAS) was used to modify the polysiloxane matrix. A comparison of the mechanical properties of coatings containing QAS modification to analogous coatings without QAS modification showed that QAS modification resulted in a dramatic improvement in mechanical properties of silica nanoparticle-reinforced coatings. QAS modification provided major enhancements in both tensile modulus and toughness. The coatings were characterized using positron annihilation spectroscopy, photo-acoustic FT-IR, differential scanning calorimetry, transmission electron microscope, and atomic force microscopy. The characterization results suggested that the QAS moieties present in the polysiloxane matrix undergo specific interactions with the surface of silica nanoparticles enabling an enhancement in interfacial adhesion between the polymer matrix and the nanoparticles. Most likely, the specific interaction that provided the enhanced mechanical properties was an ion–dipole interaction involving silanol groups present on the surface of the silica nanoparticles. The enhanced modulus and toughness of these polysiloxane materials may enable their application as a fouling-release coating for ship hulls, since current polysiloxane-based fouling release coatings suffer from poor mechanical properties and durability. DOI : 10.1007/s11998-009-9177-1 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-009-9177-1.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9070
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 7, N° 2 (03/2010) . - p. 239-252[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 012083 - Périodique Bibliothèque principale Documentaires Disponible