Abstract
Features and characteristics of wood as a natural smart material allow us to use it to create new smart biocomposite materials, intelligent systems and environments. The shape-memory effect of oak (Quercus robur L.) and birch (Betula pendula Roth) veneers was investigated. Thermomechanical spectrometry was used to study these two species, which makes it possible to establish the relationship between the deformation transformations and the nature of intermolecular interactions and the interchain organization of wood polymers. The quantitative and molecular relaxation characteristics of the topological structure were obtained for the characterization of the shape-memory effect for the permanent, temporary and after recovery shapes of birch and oak wood samples. The results showed a relationship between the quantities of shape-memory effect and changes in the molecular-topological structure. A reversible transformation of a topological structure was experimentally confirmed for birch and oak woods, with the formation of a temporary deformation and the recovery of the original permanent shapes.
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Acknowledgement
The work was carried out as part of the “Sustainable Raw Material Management Thematic Network—RING 2017,” EFOP-3.6.2-16-2017-00010 project in the framework of the Széchenyi 2020 Program. This project is supported by the European Union, co-financed by the European Social Fund. The authors are grateful to Yu. A. Olkhov (Ph.D.) for his help in obtaining data on the thermomechanical spectroscopy of birch and oak wood. The study was carried out at the Center for collective use of scientific equipment « Centre for physical and mechanical tests of wood » of Bauman Moscow State Technical University (National Research University).
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Gorbacheva, G.A., Sanaev, V.G., Belkovskiy, S.Y. et al. Experimental research on the molecular-topological structure of oak (Quercus robur L.) and birch wood (Betula pendula Roth) and its shape-memory effect. Wood Sci Technol 54, 441–456 (2020). https://doi.org/10.1007/s00226-020-01166-5
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DOI: https://doi.org/10.1007/s00226-020-01166-5