THE MICROCALORIMETRY OF ENTHALPY OF LARCH WOOD WETTING IN DIMETHYL SULFOXIDE AND METHYLCELLOSOLVE: DETERMINATION OF CELLULOSE, LIGNIN AND EXTRACTIVES
Abstract
The possibility of application of organic solvents (dimethyl sulfoxide and methylcellosolve) as molecular probes for establishing relationship between chemical composition and integrated enthalpy of wood wetting determined by method of differential microcalorimetry of heat flow has been studied in this work.
The samples of larch wood from different botanico-geographic regions were used in the experiments. The samples were also different from each other in contents of cellulose, lignin, and extractives.
The correlations between integral heat of wetting in dimethyl sulfoxide and methylcellosolve and contents of cellulose, lignin, and extractives in larch wood were detected. So, linear anamorphoses of relationship between heat of wood wetting in methylcellosolve and contents of cellulose, lignin, and extractives in wood were characterized by correlation coefficients of 0.967, 0.846, and 0.960, respectively. The correlation coefficients were found to be 0.948, 0.906, and 0.955 when dimethyl sulfoxide has been used as molecular probe. These results indicate that the proposed variant of microcalorimetry can be used for quantitative estimation of wood components.
In our opinion, the research results would be useful for wood technologists as well as wood scientists studying the influence natural and anthropogenic factors on wood properties. The method proposed in this paper can be applied to other wood species under the conditions of the experiments.
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