Open Access
ARTICLE
Influence of Xyloglucan Molar Mass on Rheological Properties of Cellulose Nanocrystal/Xyloglucan Hydrogels
Malika Talantikite1,*, Antoine Gourlay1, Sophie Le Gall1, Bernard Cathala1
1 UR1268 Biopolymères Interactions Assemblages, INRA, 44316, Nantes, France.
* Corresponding Author: Malika Talantikite. Email: .
(This article belongs to this Special Issue: Recent Developments on Biobased Materials and Composites)
Journal of Renewable Materials 2019, 7(12), 1381-1390. https://doi.org/10.32604/jrm.2019.07838
Abstract
Plant components are an inexhaustible source for the construction of
bio-based materials. Here we report, for the first time, the elaboration of
biobased cellulose nanocrystals (CNC)/xyloglucan (XG) hydrogels. XG is a
hemicellulose displaying a great affinity for cellulose surface and can be thus
irreversibly adsorbed on CNC. Properties of the hydrogels were investigated by
varying the molar mass of XG either by enzymatic treatment with Endoglucanase
(EG2) or physical fractionation by ultrasound (US). Fractions were
characterised by high-performance size exclusion chromatography (HPSEC) and
their monosacchari decompositions were determined. Three fractions with high,
average and small molar mass, (800, 300 and 100 103 g/mol respectively), were
selected in order to tune the properties of the hydrogel. Sol-gel transition
conditions were determined for each fraction by achieving phase diagram using
the inverted tube method. Mechanical properties, assessed by rheology, are
improved by increasing XG molar mass since elastic modulus is higher for
hydrogels formed with higher molar mass fractions as well as the strain at break.
Gel formation is likely due to the adsorption of XG fractions on CNC which
increases the effective hydrodynamic volume of CNC leading to steric
stabilization and interactions between loops and tails of XG adsorbed.
Keywords
Cite This Article
Talantikite, M., Gourlay, A., Gall, S. L., Cathala, B. (2019). Influence of Xyloglucan Molar Mass on Rheological Properties of Cellulose Nanocrystal/Xyloglucan Hydrogels.
Journal of Renewable Materials, 7(12), 1381–1390.
Citations