Micellar Systems and Block Copolymer Dynamics
Summary
Micellar systems formed by amphiphilic block copolymers represent a versatile class of soft matter in which hydrophobic and hydrophilic polymer blocks self-assemble into colloidal aggregates with a core–shell architecture. The dynamic behaviour of these micelles is governed by the balance of enthalpic and entropic forces, leading to concentration- and temperature-dependent transitions between unimers, micelles, gels and ordered mesophases. Rheological and scattering techniques have revealed that subtle variations in block length, architecture and environmental stimuli – such as salt concentration, pH or co-solvent composition – can tune critical parameters including the critical micelle concentration, critical micelle temperature and phase boundaries. These features underpin a wide range of applications, from targeted drug delivery and controlled release formulations to nanoscale reactors for biomolecular processing and templates for advanced materials synthesis. The interplay between micellar dynamics and macroscopic flow properties also informs the design of stimuli-responsive hydrogels, lubricants and membrane separations, highlighting the global significance of this field at the intersection of polymer science, colloid chemistry and materials engineering.
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Micellar Systems and Block Copolymer Dynamics publication trend
The graph below shows the total number of articles in micellar systems and block copolymer dynamics across all publications each year (not limited to Nature Index journals).
Technical terms
Micelle: A colloidal aggregate formed when amphiphilic molecules or block copolymers assemble above a threshold concentration or temperature, with a hydrophobic core and hydrophilic shell.
Block copolymer: A polymer composed of two or more chemically distinct homopolymer blocks covalently linked, often producing amphiphilic behaviour when one block is water-soluble and the other is water-insoluble.
Critical micelle concentration (CMC): The polymer or surfactant concentration above which micelles form in solution, marking the onset of self-assembly.
Self-assembly: The spontaneous organisation of molecular or polymeric units into ordered structures driven by non-covalent interactions.
Rheology: The study of flow and deformation of soft materials, used to characterise viscoelastic properties of micellar solutions and gels.
Small-angle X-ray scattering (SAXS): A technique probing nanoscale structure by measuring X-ray intensity at low angles, revealing size and arrangement of micellar aggregates.
Small-angle neutron scattering (SANS): A complementary scattering method using neutrons to resolve nanoscale morphology and contrast variations in polymeric systems.
References
- Tuning Pluronic F127 phase transitions by adding physiological amounts of salts: A rheology, SAXS, and NMR investigation. European Polymer Journal (2024).
- Revisiting the Solubility–Permeability Relationship with Hydrophobic Drug Umifenovir in Pluronic Solutions: Impact of pH and Co-Solvent. Pharmaceutics (2023).
- Phase transitions of aqueous solutions of Pluronic F68 in the presence of Diclofenac Sodium. International Journal of Pharmaceutics (2023).
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