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Auteur Roberta Bongiovanni |
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Characterization of a hybrid nano-silica waterborne polyurethane coating for clay bricks / Simonetta Lucia Pagliolico in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 2 (03/2016)
[article]
Titre : Characterization of a hybrid nano-silica waterborne polyurethane coating for clay bricks Type de document : texte imprimé Auteurs : Simonetta Lucia Pagliolico, Auteur ; Elena Daniela Ozzello, Auteur ; Guido Sassi, Auteur ; Roberta Bongiovanni, Auteur Année de publication : 2016 Article en page(s) : p. 267-276 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Argile
Briques
Nanoparticules
Photoréticulation
Polyacryliques
Polyuréthanes
Revêtements en phase aqueuse -- Séchage:Peinture en phase aqueuse -- Séchage
Revêtements protecteurs
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.Index. décimale : 667.9 Revêtements et enduits Résumé : A transparent hybrid organic–inorganic waterborne coating was evaluated for the protection of clay bricks. The nanocomposite film was prepared by combining an environmentally friendly process based on UV-curing of water-based acrylic resins and a mild thermal treatment to form nanosilica in situ from alkoxysilane precursors. Coated and uncoated facing bricks were compared by scanning electron microscopy, surface profilometry, water wettability, and capillary rise tests. The hybrid coatings act as a moderate water repellent; interestingly, no appreciable alteration of the aesthetic properties of the brick was observed, in particular no gloss or color change appeared after the treatment. Note de contenu : - EXPERIMENTAL : Specimen preparation - Analyses and characterization
- RESULTS AND DISCUSSION : Characterization of the brick substrate - Characterization of OIH resin - Characterization of treated brick samples compared to the untreatedDOI : 10.1007/s11998-015-9758-0 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9758-0.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26111
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 2 (03/2016) . - p. 267-276[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 17962 - Périodique Bibliothèque principale Documentaires Disponible Effect of hydroxyl-containing compounds in cationic photopolymerisation of epoxy systems / M. Sangermano in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 88, B2 (05/2005)
[article]
Titre : Effect of hydroxyl-containing compounds in cationic photopolymerisation of epoxy systems Type de document : texte imprimé Auteurs : M. Sangermano, Auteur ; Roberta Bongiovanni, Auteur ; G. Malucleli, Auteur ; A. Priola, Auteur Année de publication : 2005 Article en page(s) : p. 113-117 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Epoxydes
Photoréticulation
Polyaddition
Polybutylène téréphtalate
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : Coatings obtained through photopolymerisation of epoxy resins are described. The influence of alcohols and of functionalised polybutadiene on the cationic mechanism of the curing process is discussed. The final properties of the coatings are evaluated and correlated with the structures of the additives. A strong increase on curing rate and final epoxy conversion is achieved together with an improvement on impact resistance. Note de contenu : - EXPERIMENTAL : Materials - Film preparation and characterisation
- RESULTS AND DISCUSSION : Alcoholic additives - Functionalised polybutadiene additive
- Table 1 : Thermal properties and gel content of cured films in the presence of alcoholic additives
- Table 2 : Thermal properties, impact resistance and gel content of UV-cured filmsDOI : 10.1007/BF02699542 En ligne : https://link.springer.com/content/pdf/10.1007/BF02699542.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5424
in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS > Vol. 88, B2 (05/2005) . - p. 113-117[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 001966 - Périodique Bibliothèque principale Documentaires Disponible 002343 - Périodique Bibliothèque principale Documentaires Disponible Testing organic and organic–inorganic fluorinated hybrid coatings as protective materials for clay bricks / Simonetta Lucia Pagliolico in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 1 (01/2019)
[article]
Titre : Testing organic and organic–inorganic fluorinated hybrid coatings as protective materials for clay bricks Type de document : texte imprimé Auteurs : Simonetta Lucia Pagliolico, Auteur ; Elena Daniela Ozzello, Auteur ; Guido Sassi, Auteur ; Roberta Bongiovanni, Auteur Année de publication : 2019 Article en page(s) : p. 81-92 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Argile
Briques
Capillarité
Humidité -- Absorption:Eau -- Absorption
Perfluoropolyéther
Revêtements protecteursIndex. décimale : 667.9 Revêtements et enduits Résumé : The durability of brickworks, used as facing bricks, parapets, or chimneys, is a crucial aspect of the maintenance of buildings. Water absorption and penetration due to wind-driven rain, water rundown, and capillary rising can cause serious damages and a premature deterioration of porous clay bricks, and a significant increase in their thermal conductivity. Protective coatings for brickwork must provide enhanced hydrophobic properties without affecting moisture regulation and breathability of masonry. In the present work, a standardized type of facing clay brick was treated with two types of hydrophobic coatings based on a commercial perfluoropolyether oligomer containing alkoxysilane terminal groups, respectively, with or without an inorganic precursor, tetraethoxysilane, to generate in situ silica nanoparticles. The performance of the coating was assessed by multiple indicators, such as wetting delay, water absorption coefficient, protection degree by capillarity, contact angle, roughness and gloss, as a function of the amount of coating. Uncertainties analysis of indicators was carried out. Coating performance was assessed at different exposure times comparable to in situ real ones. Optimal amounts of coating were established to maximize the protection with the minimum quantity of polymer. As a result, a square meter of brick surface exposed to water for 2–4 h can absorb about 7–8 L of water. Very small amounts of PFPE coatings change the brick surface/water interactions, more than halving the absorbed water (0.5–2 l) and increasing the protection degree up to 80–100%. After longer exposure times, the reduction in absorbed water is basically higher when brick specimens are treated with organic/inorganic nanostructured hybrid PFPE coatings. Note de contenu : - EXPERIMENTAL : Materials and methods - Characterization of water capillary absorption - Characterization of the bricks surface
- RESULTS AND DISCUSSION : Characterization of untreated bricks - Amount of water repellent applied - Characterization of treated specimens - Effectiveness of coatingsDOI : 10.1007/s11998-018-0102-3 En ligne : https://link.springer.com/article/10.1007/s11998-018-0102-3 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31967
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 16, N° 1 (01/2019) . - p. 81-92[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20659 - Périodique Bibliothèque principale Documentaires Disponible UV-cured coatings based on waterborne resins ans Si02 nanoparticles / Anna di Gianni in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 6, N° 2 (06/2009)
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Titre : UV-cured coatings based on waterborne resins ans Si02 nanoparticles Type de document : texte imprimé Auteurs : Anna di Gianni, Auteur ; Stefano Turri, Auteur ; Roberta Bongiovanni, Auteur ; Flavio Deflorian, Auteur ; Giulio Malucelli, Auteur ; Giancarlo Rizza, Auteur Année de publication : 2009 Article en page(s) : p. 177-185 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Corrosion
Dioxyde de silicium
Nanoparticules
Photopolymères
Polymérisation
Revêtements -- Séchage sous rayonnement ultraviolet
Revêtements en phase aqueuse:Peinture en phase aqueuse
Sol-gel, ProcédéIndex. décimale : 667.9 Revêtements et enduits Résumé : The UV-curing technique in combination with the use of waterborne resins is very attractive since it gives the opportunity to get solid coatigs by means of ecofriendly processes. We found that it is possible to use such UV curable water-based formulations as matrices for the preparation of nanocomposites in which the filler is generated in situ by means of the sol-gel chemistry. We prepared silica-based nanocomposites and characterized ther comparing their performances with those of the silica-free coatings. Moreover, the article discusses the influence of the addition of a coupling agent between the organic and inorganic phase on the final properties of the nanocomposites. DOI : 10.1007/s11998-008-9137-1 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-008-9137-1.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5603
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 6, N° 2 (06/2009) . - p. 177-185[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 011361 - Périodique Bibliothèque principale Documentaires Disponible