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03.05.2024 | Original Article

Effect of heat treatment at mild temperatures on the composition and physico-chemical properties of Scots pine resin

verfasst von: Errj Sansonetti, Dace Cirule, Edgars Kuka, Ingeborga Andersone, Bruno Andersons, Kristine Meile, Laima Vevere

Erschienen in: European Journal of Wood and Wood Products

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Abstract

A major function of resin in trees is to provide defense against external attacks by releasing the resin flow in the attacked or damaged area. Nonetheless, leakage of resin on the surface can have negative aesthetic and economic impacts on wood materials. The aim of this study was to investigate how heat treatment affects the physico-chemical properties of the resin of Pinus sylvestris L. to hinder exudation on wood surfaces during service. To reduce the fluidity of the resin, it is necessary to remove the volatile fraction of resin, and several studies have been carried out in this direction, providing useful information about this process. The results from thermal analyses (DSC, TGA) confirmed that heat treatment at mild temperatures, 80 °C, 90 °C and 100 °C had a positive effect on increasing the glass transition temperature Tg and that the Tg and the residual volatile content were strongly correlated. FTIR spectroscopy, before and after heat treatment, did not reveal major changes in chemical structure, while UHPLC-DAD-MS analysis revealed significant differences in the ratios of compounds, which are the result of possible chemical reactions, such as dehydrogenation, oxidation and isomerization.

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Metadaten
Titel
Effect of heat treatment at mild temperatures on the composition and physico-chemical properties of Scots pine resin
verfasst von
Errj Sansonetti
Dace Cirule
Edgars Kuka
Ingeborga Andersone
Bruno Andersons
Kristine Meile
Laima Vevere
Publikationsdatum
03.05.2024
Verlag
Springer Berlin Heidelberg
Erschienen in
European Journal of Wood and Wood Products
Print ISSN: 0018-3768
Elektronische ISSN: 1436-736X
DOI
https://doi.org/10.1007/s00107-024-02087-x