X-ray studies of wood, lignin and wood-cellulose

Nilakantan, P. (1937) X-ray studies of wood, lignin and wood-cellulose Proceedings of the Indian Academy of Sciences, Section A, 5 (2). pp. 166-174. ISSN 0370-0089

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Official URL: http://www.ias.ac.in/j_archive/proca/5/2/166-174/v...

Related URL: http://dx.doi.org/10.1007/BF03036172


The structure of teakwood has been examined by means of X-rays. It has been found that in the annual ring of the heartwood there is almost perfect micellar orientation with respect to the fibre-axis in the brown compact layer, while in the less compact layers there is a relatively large error of orientation. In fact, as we proceed from the most compact towards the least compact layer in the annual ring, there is progressive dis-orientation of the micelles in the fibre. Extraction of wood with various solvents, and chemical treatment, are found to affect the disposition of the micelles relative to the fibre-axis to a marked extent, and these changes have been studied. It has been confirmed that when wood swells in water there is no change of crystal lattice; the phenomenon is intermicellar. Wood-structure near the region of knots and the structural differences along tangential and radial directions have also been investigated.

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