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Study on the Physical Properties of Alkoxysilane-based Stone Consolidants with Different Hydrolysis  

Park, Soung-Jin (Department of Chemistry, Sejong University)
Won, Jong-Ok (Department of Chemistry, Sejong University)
Kim, Jeong-Jin (Department of Earth and Environmental Sciences, Andong National University)
Do, Jin-Young (School of Cultural Assets, Gyeongju University)
Kim, Sa-Dug (Division of Conservation Science, National Research Institute of Cultural Heritage)
Publication Information
Journal of Conservation Science / v.27, no.2, 2011 , pp. 201-209 More about this Journal
Abstract
While consolidants based on tetraethoxysilane (TEOS) have been widely used for the consolidation of decaying stone heritages, TEOS-based consolidants suffer from practical drawbacks, such as crack formation of the gel during the drying phase due to the developed capillary force. We have prepared new TEOS-based consolidants containing flexible (3-glycidoxypropyl) trimethoxysilane (GPTMS) in order to reduce capillary force development during gel drying. In this study, we have prepared TEOS/GPTMS-based consolidants containing ETEOS in order to improve the surface hydrophobisity. The physical properties of the TEOS/GPTMS/ETEOS solution with different hydrolysis were compared with those of the commercial products Wacker OH$^{(R)}$. The contact angle of the surface increased with the addition of the ETEOS, which is higher than that of Wacker OH$^{(R)}$. The sol-gel mechanism was manipulated by the degree of hydrolysis as well as the amount of ETEOS. The properties and the applicability of the developed consolidants for the decayed Korean granites are also investigated.
Keywords
Stone consolidation; Alkoxysilane; TEOS; GPTMS; Sol-gel reaction;
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Times Cited By KSCI : 1  (Citation Analysis)
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