Acquisition of sorption isotherms for modified woods by the use of dynamic vapour sorption instrumentation. Principles and Practice
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Acquisition of sorption isotherms for modified woods by the use of dynamic vapour sorption instrumentation. Principles and Practice. / Engelund, Emil Tang; Klamer, Morten; Venås, Thomas Mark.
The International Research Group on Wood Protection. Stockholm, Sweden, 2010. IRG/WP 10-40518.Publikation: Bidrag til bog/antologi/rapport › Konferencebidrag i proceedings › Forskning
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TY - GEN
T1 - Acquisition of sorption isotherms for modified woods by the use of dynamic vapour sorption instrumentation. Principles and Practice
AU - Engelund, Emil Tang
AU - Klamer, Morten
AU - Venås, Thomas Mark
N1 - Conference code: 41
PY - 2010
Y1 - 2010
N2 - The complex wood-water relationship has been the topic of numerous studies. Sorption isotherms – in particular – have been derived for hundreds of wood species, their sap- and heartwood sections as well as for decayed, engineered and modified wood materials. However, the traditional methods for obtaining sorption isotherms are very time consuming. With new dynamic vapour sorption (DVS) instrumentation, the acquisition of data for constructing sorption isotherms is suddenly dramatically lowered. Where the traditional methods often required months, data can now be obtained in a matter of days depending on the number of data points required. The fast data acquisition makes DVS a useful tool in studying the sorption properties of wood, and especially in studying the effect of different modification treatments on these properties. This study includes an investigation of the sorption properties of heat treated and acetylated softwood. The results of both are compared with results for untreated softwood, and general remarks regarding the acquisition and interpretation of sorption data are made. It is pointed out that care must be taken when interpreting results such as desorption isotherms not commencing from full water saturation. The sorption properties of heat treated Scots pine (Celloc) and acetylated Radiata pine (Accoya) showed a greater hysteresis effect for the previous than both acetylated and untreated softwood. Furthermore, the effectiveness of the different modification treatments was quantified by the reduction in moisture content relative to untreated Scots pine sapwood. This may be used in future documentation of the resistance of modified wood to fungal decay.
AB - The complex wood-water relationship has been the topic of numerous studies. Sorption isotherms – in particular – have been derived for hundreds of wood species, their sap- and heartwood sections as well as for decayed, engineered and modified wood materials. However, the traditional methods for obtaining sorption isotherms are very time consuming. With new dynamic vapour sorption (DVS) instrumentation, the acquisition of data for constructing sorption isotherms is suddenly dramatically lowered. Where the traditional methods often required months, data can now be obtained in a matter of days depending on the number of data points required. The fast data acquisition makes DVS a useful tool in studying the sorption properties of wood, and especially in studying the effect of different modification treatments on these properties. This study includes an investigation of the sorption properties of heat treated and acetylated softwood. The results of both are compared with results for untreated softwood, and general remarks regarding the acquisition and interpretation of sorption data are made. It is pointed out that care must be taken when interpreting results such as desorption isotherms not commencing from full water saturation. The sorption properties of heat treated Scots pine (Celloc) and acetylated Radiata pine (Accoya) showed a greater hysteresis effect for the previous than both acetylated and untreated softwood. Furthermore, the effectiveness of the different modification treatments was quantified by the reduction in moisture content relative to untreated Scots pine sapwood. This may be used in future documentation of the resistance of modified wood to fungal decay.
M3 - Article in proceedings
BT - The International Research Group on Wood Protection
CY - Stockholm, Sweden
Y2 - 9 May 2010 through 13 May 2010
ER -
ID: 199514370