Micromechanics and poroelasticity of hydrated cellulose networks

Lopez-Sanchez, P., Rincon, Mauricio, Wang, D., Brulhart, S., Stokes, J. R. and Gidley, M. J. (2014) Micromechanics and poroelasticity of hydrated cellulose networks. Biomacromolecules, 15 6: 2274-2284. doi:10.1021/bm500405h

Author Lopez-Sanchez, P.
Rincon, Mauricio
Wang, D.
Brulhart, S.
Stokes, J. R.
Gidley, M. J.
Title Micromechanics and poroelasticity of hydrated cellulose networks
Journal name Biomacromolecules   Check publisher's open access policy
ISSN 1525-7797
Publication date 2014-06-09
Year available 2014
Sub-type Article (original research)
DOI 10.1021/bm500405h
Open Access Status
Volume 15
Issue 6
Start page 2274
End page 2284
Total pages 11
Place of publication Washington, DC United States
Publisher American Chemical Society
Collection year 2015
Language eng
Subject 1502 Banking, Finance and Investment
2505 Materials Chemistry
2507 Polymers and Plastics
2502 Biomaterials
Abstract The micromechanics of cellulose hydrogels have been investigated using a new rheological experimental approach, combined with simulation using a poroelastic constitutive model. A series of mechanical compression steps at different strain rates were performed as a function of cellulose hydrogel thickness, combined with small amplitude oscillatory shear after each step to monitor the viscoelasticity of the sample. During compression, bacterial cellulose hydrogels behaved as anisotropic materials with near zero Poisson's ratio. The micromechanics of the hydrogels altered with each compression as water was squeezed out of the structure, and microstructural changes were strain rate-dependent, with increased densification of the cellulose network and increased cellulose fiber aggregation observed for slower compressive strain rates. A transversely isotropic poroelastic model was used to explain the observed micromechanical behavior, showing that the mechanical properties of cellulose networks in aqueous environments are mainly controlled by the rate of water movement within the structure.
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
Queensland Alliance for Agriculture and Food Innovation
Official 2015 Collection
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Citation counts: TR Web of Science Citation Count  Cited 14 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 14 times in Scopus Article | Citations
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