Abstract
TG, DTG and DSC curves are presented and analytical results, obtained by thermogravimetry and DSC calorimetry, of ancient, fresh and waterlogged wood samples, are discussed. The criteria by which the percent content of lignin, cellulose, water and ashes (residue after heating at 700‡) were obtained by thermogravimetry, are outlined. Finally DSC curves are reported and the degradation which happen in some wood samples evidenced, especially in the case of waterlogged wood.
Zusammenfassung
Die Differenzierung von historischen, neuzeitlichen und gewÄsserten Holzproben mit den Methoden der Thermogravimetrie und DSC wurde untersucht und diskutiert. Die Kriterien, nach denen der Gehalt an Lignin, Cellulose, Wasser und Asche (Rückstand nach Erhitzung auf 700‡C) aus TG-Kurven abzuleiten sind, wurden erlÄutert und die Befunde mit den Resultaten einer nasschemischen Standardmethode verglichen. DSC-Kurven demonstrieren den chemischen Abbau der unterschiedlich gealterten respektive gewÄsserten Holzproben.
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The authors thank Dr. C. Meucci and Dr. S. D'Urbano, of the Central Institute of Restoration (ICR) Roma, which supplied the waterlogged wood samples. This work was supported by the National Research Council (CNR) of Italy.
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Campanella, L., Tomassetti, M. & Tomellini, R. Thermoanalysis of ancient, fresh and waterlogged woods. Journal of Thermal Analysis 37, 1923–1932 (1991). https://doi.org/10.1007/BF01912224
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DOI: https://doi.org/10.1007/BF01912224