Poroelastic Mechanical Effects of Hemicelluloses on Cellulosic Hydrogels under Compression

Lopez-Sanchez, Patricia, Cersosimo, Julie, Wang, Dongjie, Flanagan, Bernadine, Stokes, Jason R. and Gidley, Michael J. (2015) Poroelastic Mechanical Effects of Hemicelluloses on Cellulosic Hydrogels under Compression. PLoS One, 10 3: . doi:10.1371/journal.pone.0122132

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Author Lopez-Sanchez, Patricia
Cersosimo, Julie
Wang, Dongjie
Flanagan, Bernadine
Stokes, Jason R.
Gidley, Michael J.
Title Poroelastic Mechanical Effects of Hemicelluloses on Cellulosic Hydrogels under Compression
Journal name PLoS One   Check publisher's open access policy
ISSN 1932-6203
Publication date 2015-03
Year available 2015
Sub-type Article (original research)
DOI 10.1371/journal.pone.0122132
Open Access Status DOI
Volume 10
Issue 3
Total pages 19
Place of publication San Francisco, CA United States
Publisher Public Library of Science
Collection year 2016
Language eng
Formatted abstract
Hemicelluloses exhibit a range of interactions with cellulose, the mechanical consequences of which in plant cell walls are incompletely understood. We report the mechanical properties of cell wall analogues based on cellulose hydrogels to elucidate the contribution of xyloglucan or arabinoxylan as examples of two hemicelluloses displaying different interactions with cellulose. We subjected the hydrogels to mechanical pressures to emulate the compressive stresses experienced by cell walls in planta. Our results revealed that the presence of either hemicellulose increased the resistance to compression at fast strain rates. However, at slow strain rates, only xyloglucan increased composite strength. This behaviour could be explained considering the microstructure and the flow of water through the composites confirming their poroelastic nature. In contrast, small deformation oscillatory rheology showed that only xyloglucan decreased the elastic moduli. These results provide evidence for contrasting roles of different hemicelluloses in plant cell wall mechanics and man-made cellulose-based composite materials.
Keyword Plant cell walls
Bacterial Cellulose
Arabidopsis thaliana
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 2016 Collection
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Citation counts: TR Web of Science Citation Count  Cited 8 times in Thomson Reuters Web of Science Article | Citations
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