| People | Locations | Statistics |
|---|---|---|
| Naji, M. |
| |
| Motta, Antonella |
| |
| Aletan, Dirar |
| |
| Mohamed, Tarek |
| |
| Ertürk, Emre |
| |
| Taccardi, Nicola |
| |
| Kononenko, Denys |
| |
| Petrov, R. H. | Madrid |
|
| Alshaaer, Mazen | Brussels |
|
| Bih, L. |
| |
| Casati, R. |
| |
| Muller, Hermance |
| |
| Kočí, Jan | Prague |
|
| Šuljagić, Marija |
| |
| Kalteremidou, Kalliopi-Artemi | Brussels |
|
| Azam, Siraj |
| |
| Ospanova, Alyiya |
| |
| Blanpain, Bart |
| |
| Ali, M. A. |
| |
| Popa, V. |
| |
| Rančić, M. |
| |
| Ollier, Nadège |
| |
| Azevedo, Nuno Monteiro |
| |
| Landes, Michael |
| |
| Rignanese, Gian-Marco |
|
Imrie, Corrie
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (16/16 displayed)
- 2024A design approach to obtaining highly polar liquid crystal dimerscitations
- 2021Twist-Bend Nematic Glassescitations
- 2021Multiple Polar and Non-polar Nematic Phasescitations
- 2019Augmenting Bragg Reflection with Polymer-sustained Conical Helixcitations
- 2015New insights into the liquid crystal behaviour of hydrogen-bonded mixtures provided by temperature-dependent FTIR spectroscopycitations
- 2013Study of Structure Formation in Side-Chain Liquid Crystal Copolymers by Variable Temperature Fourier Transform Infrared Spectroscopycitations
- 2013Spectroscopic and thermal characterisation of the swelling behaviour of Nafion membranes in mixtures of water and methanolcitations
- 2013Characterization of Functionalized Side-Chain Liquid Crystal Methacrylates Containing Nonmesogenic Units by Dielectric Spectroscopycitations
- 2013A new polymer electrolyte based on a discotic liquid crystal triblock copolymercitations
- 2012Synthesis and characterisation of side chain liquid crystal copolymers containing sulfonic acid groupscitations
- 2011New insights from variable-temperature and variable-pressure studies into coupling and decoupling processes for ion transport in polymer electrolytes and glassescitations
- 2010Preparation and thermal characterisation of films containing liquid crystals in a cellulose acetate substrate for externally regulated applicationscitations
- 2007Liquid crystal dimers and higher oligomerscitations
- 2004Discotic side group liquid crystal polymer electrolytes
- 2003Application of complementary experimental techniques to characterization of the phase behavior of [C(16)mim][PF6] and [C(14)mim][PF6]citations
- 2001Highly non-linear liquid crystal tetramerscitations
Places of action
| Organizations | Location | People |
|---|
article
A new polymer electrolyte based on a discotic liquid crystal triblock copolymer
Abstract
A discotic liquid crystal triblock copolymer consisting of a central main chain triphenylene-based liquid crystal block capped at both ends by blocks of poly(ethylene oxide) (PEO) (MW = 2000 g mol-1) has been doped with lithium perchlorate in an EO:Li 6:1 ratio. The polymer electrolyte exhibits a phase separated morphology consisting of a columnar hexagonal liquid crystal phase and PEO-rich regions. The polymer electrolyte forms self-supporting, solid-like films. The ionic conductivity on initial heating of the sample is very low below ca. 60 °C but increases rapidly above this temperature. This is attributed to the melting of crystalline PEO-rich regions. Crystallisation is suppressed on cooling, and subsequent heating cycles exhibit higher conductivities but still less than those measured for the corresponding lithium perchlorate complex in poly(ethylene glycol) (MW = 2000 g mol-1). Instead the triblock copolymer mimics the behaviour of high molecular weight poly(ethylene oxide) (MW = 300,000 g mol-1). This is attributed, in part, to the anchoring of the short PEG chains to the liquid crystal block which prevents their diffusion through the sample. Temperature and pressure variations in ion mobility indicate that the ion transport mechanism in the new material is closely related to that in the conventional PEO-based electrolyte, opening up the possibility of engineering enhanced conductivities in future.