1. Nanostructured cellulose-xyloglucan blends via ionic liquid/water processing.
- Author
-
Bendaoud, Amine, Kehrbusch, Rene, Baranov, Anton, Duchemin, Benoît, Maigret, Jean Eudes, Falourd, Xavier, Staiger, Mark P., Cathala, Bernard, Lourdin, Denis, and Leroy, Eric
- Subjects
- *
NANOSTRUCTURED materials , *BIOPOLYMERS , *POLYMER blends , *IONIC liquids , *CELLULOSE , *XYLOGLUCANS - Abstract
In this work, the properties of cellulose (CE)/xyloglucan (XG) biopolymer blends are investigated, taking inspiration from the outstanding mechanical properties of plant cell walls. CE and XG were first co-solubilized in an ionic liquid, 1-ethyl-3-methylimidazolium acetate, in order to blend these biopolymers with a varying CE:XG ratio. The biopolymers were then regenerated together using water to produce solid blends in the form of films. Water-soluble XG persisted in the films following regeneration in water, indicating an attractive interaction between the CE and XG. The final CE:XG ratio of the blends was close to the initial value in solutions, further suggesting that intimate mixing takes place between CE and XG. The resulting CE/XG films were found to be free of ionic liquid, transparent and with no evidence of phase separation at the micron scale. The mechanical properties of the blend with a CE:XG ratio close to one revealed a synergistic effect for which a maximum in the elongation and stress at break was observed in combination with a high elastic modulus. Atomic force microscopy indicates a co-continuous nanostructure for this composition. It is proposed that the non-monotonous variation of the mechanical performance of the films with XG content is due to this observed nanostructuration. [ABSTRACT FROM AUTHOR]
- Published
- 2017
- Full Text
- View/download PDF