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LLPS vs. LLCPS: analogies and differences
Paride Azzari1, Raffaele Mezzenga1,2
1Department of Health Sciences and Technology, ETH Zürich, Schmelzbergstrasse 9, 8092 Zürich, Switzerland. raffaele.mezzenga@hest.ethz.ch.
Soft Matter
|February 22, 2023
Summary
This study compares liquid-liquid phase separation (LLPS) and liquid-liquid crystalline phase separation (LLCPS). While both processes share similar dynamics, their underlying physics and theoretical frameworks differ significantly.
Area of Science:
- Soft Matter Physics
- Polymer Science
- Colloid Science
Background:
- Liquid-liquid phase separation (LLPS) is common in flexible macromolecules.
- Liquid-liquid crystalline phase separation (LLCPS) involves directional alignment in semiflexible polymers and rigid colloids.
Purpose of the Study:
- To compare the physics and theories of LLPS and LLCPS.
- To clarify the mechanisms regulating these distinct phase separation processes.
Main Methods:
- Review of theoretical frameworks for phase separation.
- Thermodynamic and dynamical arguments analysis.
- Comparison of LLPS and LLCPS phenomena.
Main Results:
- Both LLPS and LLCPS exhibit similar dynamic paths (nucleation-growth, spinodal decomposition).
- The theoretical underpinnings of LLCPS are fundamentally different from LLPS.
- Metastable phases are crucial for understanding phase separation mechanisms.
Conclusions:
- LLPS and LLCPS, despite similar dynamics, are governed by distinct physical principles.
- Understanding metastable phases is key to elucidating phase separation.
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