Determination of the fibre saturation point in whole wood using differential scanning calorimetry
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A new method for determining the fibre saturation point (FSP) of whole never-dried wood is described. Enthalpy of melting values from differential scanning calorimetry (DSC) experiments are used to calculate the proportion of non-freezing water. Two methods for calculating the FSP from the enthalpy data are described. FSP determinations were carried out on the commercially important West Australian eucalypt species, Eucalyptus marginata and Eucalyptus diversicolor and a plantation softwood, Pinus radiata. Results are reproducible and are corroborated by the traditional volumetric shrinkage method for determining the FSP. On all samples below 10 mg a low temperature endothermic peak is observed as a shoulder on the main peak. It is postulated that this is due to an intermediate layer of water between the freezing and non-freezing water.
KeywordsEnthalpy Differential Scanning Calorimetry Shrinkage Calorimetry Material Processing
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- Green, D. W. 1989: Moisture content and the shrinkage of lumber. Res. Pap. FPL-RP-489. Madison, W1: US Dept. of Ag., Forest ServiceGoogle Scholar
- Greenhill, W. L. 1936: The shrinkage of Australian timbers. Part 1. Div. For. Prod. Tech. Paper No. 21. CSIR, Melbourne, AustraliaGoogle Scholar
- Greenhill, W. L. 1940: The shrinkage of Australian timbers. Part 2. Div. For. Prod. Tech. Paper No. 35. CSIR, Melbourne, AustraliaGoogle Scholar
- Kingston, R. S. T; Risdon, C. J. E. 1961: Shrinkage and density of Australian and other South-West Pacific woods. Div. For. Prod. Tech. Paper No. 13, CSIRO, AustraliaGoogle Scholar
- Scallan, A. M.; Carles, J. E. 1972: Correlation of the water retention value with the fibre saturation point. Svensk Papperstidn. 75: 699–703Google Scholar
- Stamm, A. J. 1971: Review of nine methods for determining the fibre saturation points of wood and wood products. Wood Sci. 4: 114–128Google Scholar
- Weast, R. C. (Ed.) 1983: CRC handbook of chemistry and physics. 63rd. Ed. Florida: CRC PressGoogle Scholar