A visible and long-wavelength photocured epoxy coating for stone protection |
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| Institution: | 1. Faculty of Civil Engineering, Mechanics and Petrochemistry, Institute of Chemistry, Warsaw University of Technology, ?ukasiewicza 17, 09-400 P?ock, Poland;2. Department of Physical Chemistry, Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland;1. Department of Chemistry, Faculty of Science, Vali-e-Asr University, Rafsanjan 77188-97111, Iran;2. Department of Chemistry, Faculty of Science, Yazd University, Yazd 89195-741, Iran;1. Institute of Chemistry FEB RAS, 159, Pr. 100-letya Vladivostoka, Vladivostok 690022, Russia;2. A.A. Baikov Institute of Metallurgy and Materials Science, 49, Leninskii Pr., Moscow 119334, Russia;1. Delft University of Technology, Faculty of Architecture, Julianalaan 134, 2628 BL Delft, The Netherlands;2. TNO, PO Box 49, 2600 AA Delft, The Netherlands;1. Department of Chemistry and Industrial Chemistry, University of Pisa, Via Risorgimento 35, 56126 Pisa, Italy;2. Laboratoire de Chimie Organométallique et Macromoléculaire–Matériaux Composites, Faculté des Sciences et Techniques, Université Cadi Ayyad, Marrakech, Morocco;3. Laboratoire de dynamique des bassins et géomantique, Faculté des Sciences, Université Cadi Ayyad, Marrakech, Morocco;4. Inspection des monuments historiques, Marrakech, Morocco;1. HERCULES Laboratory, Largo Marquês de Marialva 8, 7000-554 Évora, Portugal;2. Évora Chemistry Centre, Rua Romão Ramalho 59, 7000-671 Évora, Portugal;3. University of Évora, Chemistry Department, Rua Romão Ramalho 59, 7000-671 Évora, Portugal;4. Ghent University, Department of Analytical Chemistry, Krijgslaan 281-S12, 9000 Ghent, Belgium;5. José de Figueiredo Conservation and Restoration Laboratory, Institute of Museums and Conservation, Rua das Janelas Verdes 37, 1249-018 Lisboa, Portugal |
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| Abstract: | An epoxy coating modified by PDMS hydroxyl terminated is presented in this paper in order to evaluate its potential use as a protective of a stone surface. With a view to its use in restoration sites, visible and long-wavelength photoinitiated cationic polymerization is proposed here. The system investigated is based on a crosslinking mechanism which shows remarkable advantages for stone protection, such as the low toxicity of the products and facility of mixture preparation. Furthermore, the visible light exploitation represents the most important advantage, because it is easy to apply in a restoration site, with or without irradiation instruments. Besides coating characterization through FT-IR, DMTA analyses and contact angle measurement on glass slides, analyses were also carried out on coated plaster samples. These analyses were performed in order to evaluate the effectiveness of the protective, in relationship to hydrophobicity (contact angle measurement, capillary water absorption) and morphology surface changing (SE/SEM observations, colorimetric measurements) before and after polymer application and UV aging test of coated samples. The overall characterization makes it possible to consider it a suitable coating for stone protection. |
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| Keywords: | Stone protective Epoxy resin Visible cationic polymerization Solvent free Hydrophobicity |
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