Thermoreversible Ionogels with Tunable Properties via Aqeous Gelation of an Amphiphilic Quaternary Ammonium Oligoether-Based Ionic Liquid
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Ribot, Josep Casamada; Guerrero-Sanchez, Carlos; Hoogenboom, Richard; Schubert, Ulrich S.
- Abstract:
- The gelation of the amphiphilic quaternary ammonium oligoether-based ionic liquid
(AMMOENG100) with water is addressed. This approach allows the preparation of thermoreversible
ionogels with high ionic conductivity (up to 60 mS cm1), remarkable mechanical properties (storage
moduli above 105 Pa—a value comparable to the mechanical properties of some rubbers), and melting
points in the range from 20 to 53 C. These properties can be easily tuned in a broad range by varying
the water (and/or inorganic salts) concentration in the ionogels. The described method is a very
convenient way to prepare ionogels because it is based on simple and inexpensive materials, namely
AMMOENG100 and water (no volatile organic solvents involved). Infrared measurements suggested
that the observed gelation phenomenon might occur via the formation of a hydrogen bonded network
between water and the AMMOENG100 ionic liquid.
- Year:
- 2010
- Type of Publication:
- Article
- Journal:
- Journal of Materials Chemistry
- Volume:
- 20
- Pages:
- 8279 - 8284