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Preparation of Monodomain Liquid Crystal Elastomers and Liquid Crystal Elastomer Nanocomposites
Published on: February 6, 2016
Sorption properties of functionalized liquid crystalline networks
G Palaprat1, A-F Mingotaud, D Langevin
1Laboratoire Interactions Moléculaires et Réactivité Chimique et Photochimique, Université de Toulouse (Paul Sabatier), IMRCP UMR CNRS 5623, 31062 Toulouse cedex 9, France.
The Journal of Physical Chemistry. B
|May 3, 2008
Summary
Researchers created chiral elastomers that selectively bind to specific molecules. This interaction prevents standard diffusion laws, enhancing the material's capacity and selectivity for chiral compounds.
Area of Science:
- Polymer Science
- Materials Chemistry
- Chiroptical Materials
Background:
- Side-chain liquid crystalline polysiloxanes are functionalized with acid groups.
- These functionalized polymers are cross-linked to form polydomain chiral elastomers.
- Chiral molecules, specifically amine enantiomers, are used for interaction studies.
Purpose of the Study:
- To synthesize functionalized polydomain chiral elastomers.
- To investigate the sorption behavior of these elastomers with chiral amine molecules.
- To determine the influence of molecular interactions on diffusion and enantioselectivity.
Main Methods:
- Synthesis of side-chain liquid crystalline polysiloxanes with acid functions.
- Cross-linking to form polydomain chiral elastomers.
- Sorption experiments using an electronic microbalance with a chiral amine enantiomer.
Main Results:
- Fick's diffusion law was found to be invalid when interactions between the elastomer and the chiral molecule are present.
- The grafting of interacting groups onto the chiral elastomer significantly improved its capacity for the chiral amine.
- Enhanced selectivity towards one enantiomer of the chiral amine was observed.
Conclusions:
- Molecular interactions disrupt conventional diffusion models in functionalized chiral elastomers.
- Functionalized chiral elastomers offer a promising platform for selective molecular recognition and separation.
- The developed materials demonstrate potential for applications in enantioselective separation technologies.
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