Dual guar/ionic liquid gels and biohybrid material thereof: Rheological investigation Lucie Verger, Solenn Corre, Robin Poirot, Guilhem Quintard, Etienne Fleury and Aurélia Charlot

Dual guar/ionic liquid gels and biohybrid material thereof: Rheological investigation

Lucie Verger, Solenn Corre, Robin Poirot, Guilhem Quintard, Etienne Fleury and Aurélia Charlot*

Université de Lyon, F-69631, Lyon; INSA Lyon, F-69621, UMR CNRS 5223, Ingénierie des Matériaux Polymères F-69621, Villeurbanne, France. Fax: [phone]; Tel: [phone]; E-mail: [e-mail]

Electronic supporting information



Fig. S1. TGA thermogram of a guar (300 kDa, 18.5 wt. %)/BMIMCl film stored for 12 months at room temperature under air.



Fig. S2. FT-IR spectra of hydroxyl vibration region for native guar (a), guar/EMIMMP (b), guar/BMIMCl (c) and guar/AMIMCl (d) mixtures. All samples were carefully dried (80 °C under vacuum overnight) before IR analysis.




Fig. S3. Frequency-dependence of G’ (filled symbols) and G’’ (open symbols) moduli of BMIMCl at 25°C.




Fig. S4. DSC thermogram of a guar (566 KDa, 15 wt. %)/BMIMCl film (preliminarily dried) (heating-cooling-heating ramp at 10 °C/min under argon atmosphere) after a storage during one month.





Fig. S5. Evolution of G’ and G’’ moduli as a function of time of a guar (126 kDa,5 wt. %)/ BMIMCl solution at 25 °C immediately after the solubilisation step (A) and after 24 h (B).



Fig. S6. Frequency-dependence of of a guar (126 kDa)/BMIMCl solution, with a guar concentration equals to 5, 6, 7, 10, 15 and 25 wt. %. The values indicated in the figure correspond to the slope of the shear-thinning zone.



Fig. S7. Frequency-dependence of G’ (filled symbols) and G’’ (open symbols) moduli of guar (300 kDa)/BMIMCl solutions for a guar concentration of 4 (◊), 5 (□) and 6 (○) wt. %



Fig. S8. Evolution of G’ (filled symbols) and G’’ (open symbols) moduli as a function of the temperature of a guar (126 kDa, 5 wt. %)/BMIMCl solution.


Fig. S9. Evolution of E’ (filled symbols) and E’’ (open symbols) as a function of the temperature of films based on guar (566 kDa, 18.5 wt. %)/BMIMCl with a thickness of 3.215 mm (□) and 2.751 mm (◊).



Fig. S10. TGA thermogram of dried native guar gum (566 kDa) (dotted line) and BMIMCl (full line).


Fig. S11. Evolution of E’ (filled symbols) and E’’ (open symbols) as a function of the temperature of films based on guar (566 kDa, 18.5 wt. %)/BMIMCl containing a water amount of 1.7 (◊), 6.3 (□), and 7 wt. % (∆).