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Influence of combined hydro-thermal treatments on selected properties of Turkey oak (Quercus cerris L.) wood

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Abstract

A combined effect of steaming and heat treatment was imposed on green Turkey oak wood, both for sapwood and heartwood. Steaming was carried out in an autoclave at 100–120–130°C whereas heating was carried out in an oven for 2 h at 120–180°C. Equilibrium moisture content at dry, intermediate and moist state both in desorption and adsorption, swelling, cup, twist, color change, and spectral reflectance measures were registered. Swelling and water absorption decreased due to the hydro-thermal treatment. During adsorption, heartwood showed a higher hygroscopic inertia compared to sapwood and this difference increased with temperature. Cup increased with temperature in the steaming process. Twist seemed to be affected more by quality of original trunks than treatments. The wood color was more sensitive at a steaming temperature of 130°C combined with heat treatment at 180°C. Transitional treatments assured more reliable results on homogenization of hue between sapwood and heartwood.

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Acknowledgments

We thank Dr. Lázló Tolvaj (University of West Hungary, Faculty of Wood Sciences) for stimulating suggestions and Prof. M. D’Auria, and Dr L. Zuccaro (Università of Basilicata, Potenza, Italy) for the contribution given in the realization of tests and color experiments.

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Authors and Affiliations

  1. Dipartimento di Scienze dei Sistemi Colturali Forestali e dell’Ambiente, Università della Basilicata, V.le Ateneo Lucano, 10, 85100, Potenza, Italy

    Luigi Todaro, Antonio Scopa & Nicola Moretti

  2. Dipartimento di Agronomia, Selvicoltura e Gestione del Territorio, Università di Torino, Via Leonardo Da Vinci, 44, 10095, Grugliasco, TO, Italy

    Roberto Zanuttini

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  1. Luigi Todaro
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  2. Roberto Zanuttini
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  3. Antonio Scopa
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  4. Nicola Moretti
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Correspondence to Luigi Todaro.

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Todaro, L., Zanuttini, R., Scopa, A. et al. Influence of combined hydro-thermal treatments on selected properties of Turkey oak (Quercus cerris L.) wood. Wood Sci Technol 46, 563–578 (2012). https://doi.org/10.1007/s00226-011-0430-2

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