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Inelastic behaviour of bacterial cellulose hydrogel: in aqua cyclic tests

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journal contribution
posted on 12.06.2015, 13:21 by Xing Gao, Z. Shi, Changqing LiuChangqing Liu, Guang Yang, Igor Sevostianov, Vadim SilberschmidtVadim Silberschmidt
Hydrogels are finding increasingly broad use, especially in biomedical applications. Their complex structure - a low-density network of microfibrils - defines their non-trivial mechanical behaviour. The focus of this work is on test-based quantification of mechanical behaviour of a bacterial cellulose (BC) hydrogel exposed to cyclic loading. Specimens for the tests were produced using Gluconacetobacter xylinus ATCC 53582 and tested in aqua under uniaxial cyclic loading conditions in a displacement-controlled regime. Substantial microstructural changes were observed in the process of deformation. A combination of qualitative microstructural observations with quantitative force-displacement relations allowed identification of main deformation mechanisms, confirming inelastic behaviour of the BC hydrogel under a loading-unloading-reloading regime. Elastic deformation was accompanied by non-elastic (viscoplastic) deformation in both tension and compression. This study also aims to establish a background for micromechanical modelling of overall properties of BC hydrogels.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

Polymer Testing

Volume

44

Pages

82 - 92

Citation

GAO, X. et al., 2015. Inelastic behaviour of bacterial cellulose hydrogel: in aqua cyclic tests. Polymer Testing, 44, pp. 82 - 92

Publisher

© Elsevier Ltd

Version

AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Publication date

2015

Notes

This paper was accepted for publication in the journal Polymer Testing and the definitive published version is available at http://dx.doi.org/10.1016/j.polymertesting.2015.03.021

ISSN

0142-9418

Other identifier

S0142941815000756

Language

en