Conservation of historical buildings is an important issue and the environmental conditions seriously affect the monumental stones. The protection of cultural heritage buildings and monuments by surface treatment with polymers is a common practice due to their ability to form a protective layer on the monumental surface as well as to control the transport of different fluids from the surface to monument interior. [1–3] In this work three different substrates were used: Carrara/Botticino marbles and Angera stone. Commercially available siloxanes and nano-oxides films were used as protective agents to improve the hydrophobicity features of the different tested materials. Application of these coatings will be also considered for other kinds of materials such as mortars. Morphological (SEM-EDS), structural (XRD), thermal (TGA) and spectroscopic (FTIR and DRS) analyses were carried out on coated and uncoated stones to establish the changes of appearance, color, and water absorption. Static/dynamic contact angle measurements and surface free energy determinations were adopted to evaluate the final wettability and after UV-light exposure and artificial ageing. In order to evaluate the soluble salts formation  into the stones and to test the protective action of the applied coatings, the substrates were exposed to air in a typical polluted urban environment (Milan University Campus). Preliminary results, obtained after three months of exposure, show the effectiveness of the coating layers in reducing salts formation.
|Titolo:||Transparent organic/nano-oxides films for protection of construction and masonry materials|
|Data di pubblicazione:||7-feb-2013|
|Settore Scientifico Disciplinare:||Settore CHIM/02 - Chimica Fisica|
Settore CHIM/01 - Chimica Analitica
|Citazione:||Transparent organic/nano-oxides films for protection of construction and masonry materials / P. Fermo, G.Cappelletti, A. Piazzalunga, M. Merlini. ((Intervento presentato al convegno Conference on Ancient and Modern Mortars tenutosi a Firenze nel 2013.|
|Appare nelle tipologie:||14 - Intervento a convegno non pubblicato|