Multiscale Analysis of Bamboo Deformation Mechanisms Following NaOH Treatment Using X-ray and Correlative Microscopy

DOI: 10.1016/j.actbio.2018.03.050

Authors: E. Salvati (MBLEM – University of Oxford) , L. R. Brandt (MBLEM – University of Oxford) , F. Uzun (MBLEM – University of Oxford) , H. Zhang (MBLEM – University of Oxford) , C. Papadaki (MBLEM – University of Oxford) , A. M. Korsunsky (MBLEM – University of Oxford)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Acta Biomaterialia

State: Published (Approved)
Published: April 2018
Diamond Proposal Number(s): 13572

Abstract: For hundreds of years, bamboo has been employed for a variety of applications ranging from load-bearing structures to textiles. Thanks to its hierarchical structure that is functionally graded and naturally optimised, bamboo displays a variation in properties across its stem that ensures exceptional flexural performance. Often, alkaline solutions are employed for the treatment of bamboo in order to alter its natural elastic behaviour and make it suitable for particular applications. In this work we study the effect of NaOH solutions of five different concentration (up to 25%) on the elastic properties of bamboo. By exploiting the capabilities of modern experimental techniques such as in situ synchrotron X-ray scattering and Digital Image Correlation, we present detailed analysis of the deformation mechanisms taking place in the main constituents of bamboo, i.e. fibres and matrix (Parenchyma). The principal achievement of this study is the elucidation of the deformation mechanisms at the fibre scale, where the relative sliding of fibrils plays a crucial role in the property modification of the whole bamboo stem. Furthermore, we shed light on the parenchyma toughness variation as a consequence of alkali treatments.

Journal Keywords: Bamboo; Synchrotron; Alkaline Treatment; Elastic properties change

Subject Areas: Biology and Bio-materials


Instruments: B16-Test Beamline

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