The Interdependence of the Lignin Content and Electrical Properties of Wood
Keywords:
Permittivity, DC conductivity, Klason lignin, nondestructive analysis, specific gravityAbstract
A linear relationship was found to exist between the percentage of acid-insoluble lignin content and both the permittivity and DC conductivity of vacuum-dried woods, woods conditioned at 65% relative humidity, and in both of the two major grain directions. This study shows that dielectric measurements could be developed into a nondestructive analytical tool for estimating acid-insoluble lignin content in woods.References
Berzins, V. 1966. Chemical composition of woods. Pulp Paper Res. Inst. Can. Res. Note 61:4-9.nBrauns, F. F., and D. A. Brauns. 1960. The chemistry of lignin. Supplement Vol. Academic Press, N. Y.: 157-160.nCalkins, C. R. 1950. Dielectric properties of chemical pulps. Tappi 33:278-284.nCampbell, W. G., and I. R. C. McDonald. 1952. Delignification of spruce and beech by sodium chlorite. J. Chem. Soc. London 3180.nGallay, W. 1961. Pages 491-513 in F. Bolam, ed. The formation and structure of paper. Tech. Sect. Brit. Paper Maker's Assoc. London.nVenkateswaran, A. 1965. Formulas for the dielectric constant and dissipation factor of mixtures. J. Appl. Polym. Sci. 9:1127-1139.nVenkateswaran, A. 1969. A comparison of the dielectric method with density, moisture regain, and X-ray diffraction methods of determining fine structure in cellulosic materials. J. Appl. Polymer Sci. 13:2469-2481.nVenkateswaran, A. 1970. Application of dissociation hypothesis to electrical conduction in wood. Wood Sci. 3:183-190.nVenkateswaran, A. 1972. A comparison of the electrical properties of milled wood, milled wood cellulose, and milled wood lignin. Wood Sci. 4: 248-254.nVerseput, H. W. 1951. Studies of dielectric properties of chemical pulps. Tappi 34:572-578.nWise, L. E., M. Murphy, and A. A. D'Addieco. 1945. Chlorite holocellulose. Tech. Assoc. Papers, Series 29:210-218.n
Downloads
Published
Issue
Section
License
The copyright of an article published in Wood and Fiber Science is transferred to the Society of Wood Science and Technology (for U. S. Government employees: to the extent transferable), effective if and when the article is accepted for publication. This transfer grants the Society of Wood Science and Technology permission to republish all or any part of the article in any form, e.g., reprints for sale, microfiche, proceedings, etc. However, the authors reserve the following as set forth in the Copyright Law:
1. All proprietary rights other than copyright, such as patent rights.
2. The right to grant or refuse permission to third parties to republish all or part of the article or translations thereof. In the case of whole articles, such third parties must obtain Society of Wood Science and Technology written permission as well. However, the Society may grant rights with respect to Journal issues as a whole.
3. The right to use all or part of this article in future works of their own, such as lectures, press releases, reviews, text books, or reprint books.