Summary
The property of fibre symmetry as exhibited by wood cellulose can be used to derive an explicit relationship between the orientation of a cellulose microfibril and the orientation of the X-ray beam diffracted by any of its crystallographic planes. The solution applies to a microfibril of any orientation and so is well suited to evaluating the microfibril angle distribution in wood containing cells of any cross-sectional shape. The (002) and (040) reflections of cellulose have complementary properties that could be exploited to enable current problems associated with the use of each individually for evaluating the mean microfibril angle of the S2 layer to be overcome. It is expected that it will be possible to measure the microfibril angle distribution throughout the whole cell wall and also measure the average cell cross-section of a wood sample, by analysing (002) and (040) diffraction profiles in conjunction with each other.
Similar content being viewed by others
References
Cave, I. D. 1966:Theory of X-ray Measurement of Microfibril Angle in Wood. Forest Prod. J. 16; 37–42
Cave, I. D.;Walker, J. C. F. 1994: Stiffness of wood in fast-grown softwoods: the influence of Microfibril angle. Forest Prod. J. 44; 43–48
Cave, I. D. 1996: X-ray Measurement of Microfibril Angle. Part 2: The X-ray Diagram. Wood Sci. Technol. (in press)
El-osta, M;Kellog, R. M.; Foschi, R. O.; Butters, R. G. 1973: A Direct X-Ray Technique for Measuring Microfibril Angle. Wood and Fiber. 5, 118–128
Meyer, K. H.;Misch, H. 1937: Positions des atomes dans le nouveau modèle spatial de la cellulose. Helv. Chim. Acta. 20, 232
Meylan, B. A. 1967: Measurement of Microfibril Angle by X-Ray Diffraction. Forest Prod. J. 17, 51–58
Nye, J. F. 1985: Physical Properties of Crystals. Oxford. Oxford University Press
Preston, R. D. 1974: The Physical Biology of Plant Cell Walls. London: Chapman and Hall Ltd
Prud'homme, R. E.;Noah, J.; 1975: Determination of Fibril Angle Distribution in Wood Fibers: A comparison between the X-ray diffraction and the polarized microscope methods. Wood and Fiber. 6, 282–289
Radhakrishnan, T.;Patil, N. B. P.;Dweltz, N. E. 1969: Crystalline orientation in natural cellulose fibres. Textile Res. J. 39, 1003–1014
Yamamoto, H.;Okuyama, T.;Yoshida, M. 1993: Method of Determining the Mean Microfibril Angle of Wood over a Wide Range by the Improved Cave's Method. Mokuzai Gakkaishi. 39, 375–381
Author information
Authors and Affiliations
Additional information
This work is supported by the NZ Foundation for Research, Science and Technology under contract # UOC 401
Rights and permissions
About this article
Cite this article
Cave, I.D. Theory of X-ray measurement of microfibril angle in wood. Wood Sci.Technol. 31, 143–152 (1997). https://doi.org/10.1007/BF00705881
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00705881