Effect of temperature on soft glassy behaviour of silica - Ionic liquid nanocomposite

Author

Saravanakumar, K. ; Tata, B.V.R.

Author_Institution

Condensed Matter Phys. Div., Indira Gandhi Centre for Atomic Res., Kalpakkam, India

fYear

2011

fDate

28-30 Nov. 2011

Firstpage

40

Lastpage

43

Abstract

We prepared nanocomposites of silica-ionic liquid with varying composition of silica nanoparticles (mean diameter d =14 nm) in l-Ethyl-3-methyl bis (trifluromethanesulfonyl) imide (Emim TFSI) ionic liquid. Dynamic rheological measurements have revealed soft glassy nature of these nanocomposites at room temperature. Quite surprisingly, the nanocomposite is found to behave as a strong gel rather than melting into a viscoelastic liquid upon increasing the temperature. A qualitative explanation for the observed behaviour is provided based on the networks of aggregates of silica nanoparticles in ionic liquid and their evolution with respect to temperature.

Keywords

gels; glass; glass structure; nanocomposites; nanoparticles; non-Newtonian fluids; organic compounds; particle reinforced composites; rheology; viscoelasticity; 1-ethyl-3-methyl bis (trifluromethanesulfonyl) imide ionic liquid; SiO₂; aggregates; dynamic rheological measurements; gel; melting; silica nanoparticles; silica-ionic liquid nanocomposite; soft glassy behaviour; temperature 293 K to 298 K; viscoelastic liquid; Atmospheric measurements; Extraterrestrial measurements; Heating; Nanocomposites; Ovens; Particle measurements; Soft glasss; ionic liquid; rheology; silica nanoparticle;

fLanguage

English

Publisher

ieee

Conference_Titel

Nanoscience, Engineering and Technology (ICONSET), 2011 International Conference on

Conference_Location

Chennai

Print_ISBN

978-1-4673-0071-1

Type

conf

DOI

10.1109/ICONSET.2011.6167905

Filename

6167905