ABSTRACT: The medieval glass is generally attacked by atmospheric pollutants conveyed by water in liquid or vapor form, which activates the corrosion process. Since the conservation strategies are currently addressed to maintain the windows in their original contexts, it is necessary to protect them from further degradation phenomena. We report here on the results of water- repellent hybrid sol-gel coatings obtained by TEOS (Tetra-Ethyl-Ortho-Silicate) mixed with different amounts of Si-alkoxides functionalized with alkyl groups. Static contact angle measurements were performed to check the water-repellency of the surfaces. On the basis of the transparency, the contact angle values and the lowest amount of the organic component, three compositions were selected and applied on medieval-like glass samples that were colorimetrically characterized. The silica-based protective materials don’t lead to reaction by-products, are water-repellent, compatible with the glassy substrate, colorless and transparent, hence satisfy the main requirements of the conservation of Cultural Heritage.

Hybrid sol-gel based protective coatings for historical window glasses / DE FERRI, Lavinia; Lorenzi, Andrea; Lottici, Pier Paolo; Montenero, Angelo; G., Vezzalini. - STAMPA. - (2013), pp. 231-234. ((Intervento presentato al convegno International Congress on Science and Technology for the Conservation of Cultural Heritage tenutosi a Santiago de Compostela, Spain nel 2-5-October 2012 [10.1201/b15577].

Hybrid sol-gel based protective coatings for historical window glasses

DE FERRI, Lavinia
Investigation
;
LORENZI, Andrea
Investigation
;
LOTTICI, Pier Paolo
Investigation
;
MONTENERO, Angelo;
2013

Abstract

ABSTRACT: The medieval glass is generally attacked by atmospheric pollutants conveyed by water in liquid or vapor form, which activates the corrosion process. Since the conservation strategies are currently addressed to maintain the windows in their original contexts, it is necessary to protect them from further degradation phenomena. We report here on the results of water- repellent hybrid sol-gel coatings obtained by TEOS (Tetra-Ethyl-Ortho-Silicate) mixed with different amounts of Si-alkoxides functionalized with alkyl groups. Static contact angle measurements were performed to check the water-repellency of the surfaces. On the basis of the transparency, the contact angle values and the lowest amount of the organic component, three compositions were selected and applied on medieval-like glass samples that were colorimetrically characterized. The silica-based protective materials don’t lead to reaction by-products, are water-repellent, compatible with the glassy substrate, colorless and transparent, hence satisfy the main requirements of the conservation of Cultural Heritage.
9781138000094
Hybrid sol-gel based protective coatings for historical window glasses / DE FERRI, Lavinia; Lorenzi, Andrea; Lottici, Pier Paolo; Montenero, Angelo; G., Vezzalini. - STAMPA. - (2013), pp. 231-234. ((Intervento presentato al convegno International Congress on Science and Technology for the Conservation of Cultural Heritage tenutosi a Santiago de Compostela, Spain nel 2-5-October 2012 [10.1201/b15577].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11381/2541444
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