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Synthesis and Characterization of Supramolecular Colloids
Published on: April 22, 2016
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Triggered Degradable Colloidal Particles with Ordered Inverse Bicontinuous Cubic and Hexagonal Mesophases
1School of Science, College of Science, Engineering and Health, RMIT University, Melbourne, VIC 3000, Australia.
ACS Nano
|March 1, 2021
Summary
Researchers developed a simple method using RAFT-mediated polymerization-induced self-assembly (PISA) to create triggered degradable block copolymer structures. This technique enables the formation of diverse complex morphologies for advanced applications.
Area of Science:
- Polymer Chemistry
- Materials Science
- Nanotechnology
Background:
- Block copolymers self-assemble into various nanostructures.
- Polymerization-induced self-assembly (PISA) offers a versatile route to complex polymer architectures.
- Achieving inverse mesophases with acrylate-based monomers via PISA remains challenging.
Purpose of the Study:
- To develop a facile strategy for preparing triggered degradable block copolymer nano/macro-objects.
- To explore the morphological diversity, including rarely achieved inverse mesophases, via RAFT-mediated PISA.
- To elucidate the formation mechanism and guide the scalable preparation of complex morphologies.
Main Methods:
- RAFT-mediated polymerization-induced self-assembly (PISA) was employed.
- Transmission electron microscopy (TEM), scanning electron microscopy (SEM), and synchrotron small-angle X-ray scattering (SAXS) were used for characterization.
- Morphological phase diagrams were constructed based on factors like solid content, degree of polymerization, and stabilizer block chain length.
Main Results:
- A wide range of morphologies, from micelles and vesicles to spongosomes, cubosomes, and hexosomes, were successfully synthesized.
- Morphological transitions were systematically studied and visualized.
- The study achieved inverse mesophases using acrylate-based monomers with high conversion.
- A triggered degradable system was demonstrated across an extended morphological range.
Conclusions:
- The developed RAFT-mediated PISA strategy provides facile access to triggered degradable block copolymer nano/macro-objects with diverse morphologies.
- The constructed phase diagrams offer guidance for scalable preparation of complex structures, particularly inverse mesophases.
- The stimuli-responsive nature and broad morphological range of these systems hold significant potential for applications in triggered release, templating, and beyond.
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