title: Advanced mortar coatings for cultural heritage protection. Durability towards prolonged UV and outdoor exposure.
abstract: In the present work, two kinds of hybrid polymeric-inorganic coatings containing TiO2or SiO2particles and prepared starting from two commercial resins (Alpha®SI30 and Bluesil®BP9710) were developed and applied to two kinds of mortars (an air-hardening calcic lime mortar [ALM] and a natural hydraulic lime mortar [HLM]) to achieve better performances in terms of water repellence and consequently damage resistance. The two pure commercial resins were also applied for comparison purposes. Properties of the coated materials and their performance were studied using different techniques such as contact angle measurements, capillary absorption test, mercury intrusion porosimetry, surface free energy, colorimetric measurements and water vapour permeability tests. Tests were also performed to determine the weathering effects on both the commercial and the hybrid coatings in order to study their durability. Thus, exposures to UV radiation, to UV radiation/condensed water cycles and to a real polluted atmospheric environment have been performed. The effectiveness of the hybrid SiO2based coating was demonstrated, especially in the case of the HLM mortar.
authors.affiliation: Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi 19, 20133, Milan, Italy.
authors.forename: F
authors.initials: F
authors.lastname: Pino
authors.affiliation: Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi 19, 20133, Milan, Italy. paola.fermo@unimi.it.
authors.forename: P
authors.initials: P
authors.lastname: Fermo
authors.affiliation: Dipartimento di Biologia, Ecologia e Scienze della Terra (DiBEST), Università della Calabria, Via Pietro Bucci, Cubo 12 B, Arcavacata di Rende, 87036, Cosenza, Italy.
authors.forename: M
authors.initials: M
authors.lastname: La Russa
authors.affiliation: Dipartimento di Biologia, Ecologia e Scienze della Terra (DiBEST), Università della Calabria, Via Pietro Bucci, Cubo 12 B, Arcavacata di Rende, 87036, Cosenza, Italy.
authors.forename: S
authors.initials: S
authors.lastname: Ruffolo
authors.affiliation: Dipartimento di Biologia, Ecologia e Scienze della Terra (DiBEST), Università della Calabria, Via Pietro Bucci, Cubo 12 B, Arcavacata di Rende, 87036, Cosenza, Italy.
authors.forename: V
authors.initials: V
authors.lastname: Comite
authors.affiliation: College of Technology, Eastern Michigan University, Ypsilanti, MI, USA.
authors.forename: J
authors.initials: J
authors.lastname: Baghdachi
authors.affiliation: Dipartimento di Scienza della Terra, Università degli Studi di Firenze, Florence, Italy.
authors.forename: E
authors.initials: E
authors.lastname: Pecchioni
authors.affiliation: CNR-Istituto per la Conservazione e la Valorizzazione dei Beni Culturali, Sesto Fiorentino, Florence, Italy.
authors.forename: F
authors.initials: F
authors.lastname: Fratini
authors.affiliation: Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi 19, 20133, Milan, Italy. giuseppe.cappelletti@unimi.it.
authors.forename: G
authors.identifier: http://orcid.org/0000-0002-1260-2979
authors.initials: G
authors.lastname: Cappelletti
mesh_terms: D017610:Calcium Compounds; D020099:Coated Materials, Biocompatible; D003252:Construction Materials; D008422:Materials Testing; D010087:Oxides; D011108:Polymers; D012822:Silicon Dioxide; D013499:Surface Properties; D014025:Titanium
chemical_list: D017610:Calcium Compounds; D020099:Coated Materials, Biocompatible; D010087:Oxides; D011108:Polymers; D012822:Silicon Dioxide; C016538:lime; D014025:Titanium
keywords: Aging; Cultural heritage; Exposure; Hybrid coatings; Mortars; Surface modification