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Dehydration of bacterial cellulose and the water content effects on its viscoelastic and electrochemical properties

Bacterial cellulose (BC) has interesting properties including high crystallinity, tensile strength, degree of polymerisation, water holding capacity (98%) and an overall attractive 3D nanofibrillar structure. The mechanical and electrochemical properties can be tailored upon incomplete BC dehydratio...

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Autores principales: R. Rebelo, Ana, Archer, Andrew J., Chen, Xiuli, Liu, Changqing, Yang, Guang, Liu, Yang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Taylor & Francis 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5917443/
https://www.ncbi.nlm.nih.gov/pubmed/29707063
http://dx.doi.org/10.1080/14686996.2018.1430981
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author R. Rebelo, Ana
Archer, Andrew J.
Chen, Xiuli
Liu, Changqing
Yang, Guang
Liu, Yang
author_facet R. Rebelo, Ana
Archer, Andrew J.
Chen, Xiuli
Liu, Changqing
Yang, Guang
Liu, Yang
author_sort R. Rebelo, Ana
collection PubMed
description Bacterial cellulose (BC) has interesting properties including high crystallinity, tensile strength, degree of polymerisation, water holding capacity (98%) and an overall attractive 3D nanofibrillar structure. The mechanical and electrochemical properties can be tailored upon incomplete BC dehydration. Under different water contents (100, 80 and 50%), the rheology and electrochemistry of BC were evaluated, showing a progressive stiffening and increasing resistance with lower capacitance after partial dehydration. BC water loss was mathematically modelled for predicting its water content and for understanding the structural changes of post-dried BC. The dehydration of the samples was determined via water evaporation at 37 °C for different diameters and thicknesses. The gradual water evaporation observed was well-described by the model proposed (R (2) up to 0.99). The mathematical model for BC water loss may allow the optimisation of these properties for an intended application and may be extendable for other conditions and purposes.
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spelling pubmed-59174432018-04-27 Dehydration of bacterial cellulose and the water content effects on its viscoelastic and electrochemical properties R. Rebelo, Ana Archer, Andrew J. Chen, Xiuli Liu, Changqing Yang, Guang Liu, Yang Sci Technol Adv Mater Focus on Nanocellulose-based Materials Bacterial cellulose (BC) has interesting properties including high crystallinity, tensile strength, degree of polymerisation, water holding capacity (98%) and an overall attractive 3D nanofibrillar structure. The mechanical and electrochemical properties can be tailored upon incomplete BC dehydration. Under different water contents (100, 80 and 50%), the rheology and electrochemistry of BC were evaluated, showing a progressive stiffening and increasing resistance with lower capacitance after partial dehydration. BC water loss was mathematically modelled for predicting its water content and for understanding the structural changes of post-dried BC. The dehydration of the samples was determined via water evaporation at 37 °C for different diameters and thicknesses. The gradual water evaporation observed was well-described by the model proposed (R (2) up to 0.99). The mathematical model for BC water loss may allow the optimisation of these properties for an intended application and may be extendable for other conditions and purposes. Taylor & Francis 2018-03-09 /pmc/articles/PMC5917443/ /pubmed/29707063 http://dx.doi.org/10.1080/14686996.2018.1430981 Text en © 2018 The Author(s). Published by National Institute for Materials Science in partnership with Taylor & Francis http://creativecommons.org/licenses/by/4.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Focus on Nanocellulose-based Materials
R. Rebelo, Ana
Archer, Andrew J.
Chen, Xiuli
Liu, Changqing
Yang, Guang
Liu, Yang
Dehydration of bacterial cellulose and the water content effects on its viscoelastic and electrochemical properties
title Dehydration of bacterial cellulose and the water content effects on its viscoelastic and electrochemical properties
title_full Dehydration of bacterial cellulose and the water content effects on its viscoelastic and electrochemical properties
title_fullStr Dehydration of bacterial cellulose and the water content effects on its viscoelastic and electrochemical properties
title_full_unstemmed Dehydration of bacterial cellulose and the water content effects on its viscoelastic and electrochemical properties
title_short Dehydration of bacterial cellulose and the water content effects on its viscoelastic and electrochemical properties
title_sort dehydration of bacterial cellulose and the water content effects on its viscoelastic and electrochemical properties
topic Focus on Nanocellulose-based Materials
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5917443/
https://www.ncbi.nlm.nih.gov/pubmed/29707063
http://dx.doi.org/10.1080/14686996.2018.1430981
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