Enhanced Historical Limestone Protection by New Organic/Inorganic Additive-Modified Resins
Source abstract
Abstract
The Cultural Heritage deterioration is a spontaneous decay process due to water percolation and air pollutant deposition. In this context, novel acrylic (Twinswet, TW) and siloxane-based (Alpha®SI30) resins were exploited starting from commercial products and then modified by adding either a commercial polysiloxane-based additive (TegoPhobe 1500N) or a precursor of SiO2 nanoparticles (Tetraethyl ortosilicate, TEOS) to improve the Vicenza stone surface hydrophobicity. Properties of the coated materials were studied using different techniques such as water contact angle (WCA), capillary absorption, colorimetric and water vapor permeability measurements. Accelerated UV aging and eight-month outdoor exposure tests (at Milan University campus) were also performed to determine the coatings durability. Notably, the addition of both additives slightly enhanced the surface hydrophobicity resulting in WCAs of about 140°, and decreased the water absorption especially for Alpha-based resins. Conversely, a reduction of water vapor permeability was observed, even if within the threshold value of 50%. Concerning the color variation, Alpha®SI30 preserved the stone external aspect; instead, TW smoothly modified the surface color. All of the studied coatings were stable to both UV aging and outdoor exposure. Hence, the present modified commercial coatings revealed to be very promising for the protection of historical monuments.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Building materials and conservation · Conservation Techniques and Studies · Cultural Heritage Materials Analysis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi 19, 20133 Milan, Italy
Consorzio Interuniversitario per la Scienza e Tecnologia dei Materiali (INSTM), Via Giusti 9, 50121 Firenze, Italy
References (53)
Show source-provided references
1. Mosquera, M.J., Pinho, L., Facio, D.S., and Elhaddad, F. New nanomaterials for conservation of cultural heritage: Consolidants, hydrophobic and self-cleaning products. Science, Technology and Cultural Heritage, Proceedings of the 2nd International Congress on Science and Technology for the Conservation of Cultural Heritage, Sevilla, Spain, 24–27 June 2014, CRC Press.
2. A new preventive coating for building stones mixing a water repellent and an eco-friendly biocide10.1016/j.porgcoat.2018.03.022 ↗
3. Advanced mortar coatings for cultural heritage protection. Durability towards prolonged UV and outdoor exposure10.1007/s11356-016-7611-3 ↗
4. The enhanced deterioration of the cultural heritage monuments due to air pollution10.1007/s11356-009-0114-8 ↗
5. Salts in the deterioration of porous materials: An overview10.1179/019713600806113176 ↗
6. Chemistry for the conservation of the cultural heritage10.1016/0048-9697(94)90537-1 ↗
7. Colour and ultrasound propagation speed changes by different ageing of freezing/thawing and cooling/heating in granitic materials10.1016/j.coldregions.2012.08.004 ↗
8. Applied microbiology and biotechnology in the conservation of stone cultural heritage materials10.1007/s00253-006-0599-8 ↗
9. Geochemical and mineralogical composition of black weathering crusts on limestones from seven different European countries10.1007/s12665-018-7384-8 ↗
10. Black crusts on Venetian built heritage, investigation on the impact of pollution sources on their composition10.1140/epjp/i2018-12230-8 ↗
11. The effects of air pollution on cultural heritage: The case study of Santa Maria delle Grazie al Naviglio Grande (Milan)10.1140/epjp/i2018-12365-6 ↗
12. Self-assembly is not the only reaction possible between alkyltrichlorosilanes and surfaces: Monomolecular and oligomeric covalently attached layers of dichloro- and trichloroalkylsilanes on silicon10.1021/la000471z ↗
13. Efficiency and resistance of the artificial oxalate protection treatment on marble against chemical weathering10.1016/j.apsusc.2006.09.056 ↗
14. Testing a fluorinated compound as a protective material for calcarenite10.1016/S1296-2074(01)01109-8 ↗
15. Silica/silicone nanofilament hybrid coatings with almost perfect superhydrophobicity10.1002/cphc.201200995 ↗
16. Physicochemical characterization of acrylic polymeric resins coating porous materials of artistic interest10.1016/j.porgcoat.2003.10.011 ↗
17. New strategies for the synthesis of partially fluorinated acrylic polymers as possible materials for the protection of stone monuments10.1016/S0014-3057(03)00110-1 ↗
18. Fluorinated polyacrylic resins for the protection of cultural heritages: The effect of fluorine on hydrophobic properties and photochemical stability10.1246/cl.171020 ↗
19. Superhydrophobic films for the protection of outdoor cultural heritage assets10.1007/s00339-009-5233-z ↗
20. Siloxane-containing polymer matrices as coating materials10.1007/s11998-007-9028-x ↗
21. Surface modification of cured cement pastes by silane coupling agents10.1021/am301967v ↗
22. Facile preparation of self-healing waterborne superhydrophobic coatings based on fluoroalkyl silane-loaded microcapsules10.1039/C6RA09582H ↗
23. Methyltrichlorosilane polysiloxane filament growth on glass using low cost solvents and comparison with gas phase reactions10.1016/j.tsf.2016.07.041 ↗
24. Superhydrophobic polymer-particle composite films produced using various particle sizes10.1002/sia.4930 ↗
25. Assessment of synthetic polymeric coatings for the protection and preservation of stone monuments10.1016/j.culher.2006.06.007 ↗
26. Acrylic emulsion paint films: The effect of solution pH, conductivity, and ionic strength on film swelling and surfactant removal10.1179/2047058412Y.0000000076 ↗
27. Preparation and Properties of Fluorinated Poly(ethyl methacrylate-co-butyl acrylate)10.1134/S1560090419020076 ↗
28. The preservation damage of hydrophobic polymer coating materials in conservation of stone relics10.1016/j.porgcoat.2013.03.018 ↗
29. The hydrophobicity modulation of glass and marble materials by different Si-based coatings10.1016/j.porgcoat.2019.105260 ↗
30. On the role of hydrophobic Si-based protective coatings in limiting mortar deterioration10.1007/s11356-015-4962-0 ↗
31. Smart hybrid coatings for natural stones conservation10.1016/j.porgcoat.2014.05.029 ↗
32. Fabrication of water repellent coatings using waterborne resins for the protection of the cultural heritage10.1002/masy.201300063 ↗
33. Lettieri, M., Masieri, M., Morelli, A., Pipoli, M., and Frigione, M. (2018). Oleo/Hydrophobic Coatings Containing Nano-Particles for the Protection of Stone Materials Having Different Porosity. Coatings, 8.10.3390/coatings8120429 ↗
34. Cattaneo, A., De Vecchi, G.P., Pitturi, L.M., and Vitturi, L. (1976). Le pietre tenere dei Colli Berici. Atti e Memorie dell’Accademia Patavina di Scienze, Lettere ed Arti, Accademia Patavina di Scienze.
35. Marchesini, B., Biscontin, G., and Frascati, S. (1972). Alterazione delle pietre tenere dei colli Berici. Atti XXVI Congresso ATI, Associazione Termotecnica Italiana.
36. Micro-porosity and minero-petrographic features influences on decay: Experimental data from four dimension stones10.1016/j.conbuildmat.2018.04.041 ↗
37. An experimental investigation into the salt-weathering susceptibility of building limestones10.1007/s00603-020-02208-x ↗
38. Galan, E. (1989, January 7–10). Carbonate rocks; alteration and control of stone quality: Some consideration. Proceedings of the Atti del I Simposio Internernazionale La Conservazione dei Monumenti nel Bacino nel Mediterraneo, Bari, Italy.
39. Hydrophobizing coatings for cultural heritage. A detailed study of resin/stone surface interaction10.1007/s00339-013-8127-z ↗
40. (1993). NORMAL 43/93 Misure Colorimetriche di Superfici Opache, CNR-ICR.
41. Multifunctional TiO2 coatings for Cultural Heritage10.1016/j.porgcoat.2011.12.008 ↗
42. UNI EN 15801 (2010). Conservation of Cultural Property. Test Methods. Determination of Water Absorption by Capillarity, UNI.
43. UNI EN 15803 (2009). Conservation of Cultural Property. Test Methods. Determination of Water Vapour Permeability, UNI.
44. Fabrication of super-hydrophobic surfaces for enhanced stone protection10.1016/j.surfcoat.2008.10.041 ↗
45. Stearyl methacrylate co-polymers: Towards new polymer coatings for mortars protection10.1016/j.apsusc.2019.05.097 ↗
46. Fermo, P., Goidanich, S., Comite, V., Toniolo, L., and Gulotta, D. (2018). Study and Characterization of Environmental Deposition on Marble and Surrogate Substrates at a Monumental Heritage Site. Geosciences, 8.10.3390/geosciences8090349 ↗
47. Effect of the addition of hydroxyl-terminated polydimethylsiloxane to TEOS-based stone consolidants10.1016/j.culher.2009.07.002 ↗
48. Directive 2008/50/EC (2021, January 09). Cleaner European Parliament and of the Council of 21 May 2008 on Ambient air Quality and Air for Europe. Available online: https://eur-lex.europa.eu/eli/dir/2008/50/oj.
49. Experimental study of limestone and sandstone sulphation in polluted realistic conditions: The Lausanne Atmospheric Simulation Chamber (LASC)10.1016/1352-2310(95)00495-5 ↗
50. A multi-analytical approach for the characterization of black crusts on the facade of an historical cathedral10.1016/j.microc.2020.105121 ↗
51. PM10 source apportionment in Milan (Italy) using time-resolved data10.1016/j.scitotenv.2011.07.048 ↗
52. PM10 source apportionment applying PMF and chemical tracer analysis to ship-borne measurements in the Western Mediterranean10.1016/j.atmosenv.2015.11.009 ↗
53. Damage monitoring on carbonate stones: Field exposure tests contributing to pollution impact evaluation in two Italian sites10.1016/j.conbuildmat.2017.07.048 ↗