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High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal
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Thermoreversible Gel-Dispersed Liquid Crystals
1Department of Physics and Information Technology, Faculty of Computer Science and Systems Engineering, Kyushu Institute of Technology, Kawazu 680-4, Iizuka 820-8502, Fukuoka, Japan.
Gels (Basel, Switzerland)
|December 22, 2023
Summary
This study models thermoreversible gels mixed with liquid crystals (LCs), predicting new phase diagrams. The findings reveal phase separation behaviors and suggest novel polymer-dispersed liquid crystal applications.
Area of Science:
- Materials Science
- Physical Chemistry
- Soft Matter Physics
Background:
- Binary mixtures of thermoreversible gels and low-molecular-weight liquid crystals (LCs) exhibit complex phase behaviors.
- Understanding these phase transitions is crucial for developing advanced materials.
Purpose of the Study:
- To introduce a simple model for describing the phase behaviors of binary mixtures of thermoreversible gels and liquid crystals.
- To predict novel phase diagrams on the temperature-concentration plane.
Main Methods:
- Development of a simple theoretical model.
- Analysis of phase diagrams including sol-gel transitions, nematic-isotropic transitions, and phase separation.
Main Results:
- Predicted novel phase diagrams on the temperature-concentration plane.
- Observed phase separation between isotropic sol and gel phases at high temperatures.
- Identified phase separation between nematic sol and isotropic gel phases at lower temperatures, with dispersed nematic domains.
Conclusions:
- The model successfully describes phase behaviors in thermoreversible gel and LC mixtures.
- Suggests potential for thermoreversible gelation of reactive molecules with LCs as a new class of polymer-dispersed liquid crystals.
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