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Characterization of silicone coating for archeological stone conservation
Author(s) -
ElMidany A. A.,
Khallaf M. K.,
ElMofty S. E.
Publication year - 2011
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.3739
Subject(s) - silicone , porosity , polymer , electrokinetic phenomena , compressive strength , coating , materials science , durability , fourier transform infrared spectroscopy , lime , emulsion , composite material , mineralogy , chemical engineering , geology , metallurgy , nanotechnology , engineering
Testing of polymeric materials for protection of archeological stones is a subject of continuous research. The selection criteria of a suitable polymer need intensive investigation. In the current study, silicone emulsion was used for stone conservation. The effectiveness of silicone in protecting either sandstone or limestone, as main archeological stones, was investigated in terms of its interaction with the studied stone. In addition, the durability of the coating under different environmental conditions was tested and simulated by artificial aging. Additionally, the mechanism of the interaction was investigated using interfacial measurements. The results showed the physical nature of adsorption on either stones as indicated by Fourier Transform Infrared (FTIR) and Electrokinetic results. Moreover, the polymer shows a significant effect on the physical and mechanical properties, e.g. increase in bulk density from 1.9 to 2.2 g/cm 3 and decrease in porosity from 15.8 to 2.5% as well as the noticeable increase in compressive strength. All these measures indicated the suitability of the polymer in conservation of either sandstone or limestone. Copyright © 2011 John Wiley & Sons, Ltd.