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Nanofibrillar Stimulus-Responsive Cholesteric Microgels with Catalytic Properties.

Sangho Cho1, Yunfeng Li1, Minseok Seo1

  • 1Department of Chemistry, University of Toronto, 80 Saint George Street, Toronto, Ontario, M5S 3H6, Canada.

Angewandte Chemie (International Ed. in English)
|October 14, 2016
PubMed
Summary

We developed responsive microgels using cellulose nanocrystals (CNCs) that act as microreactors for catalysis. These materials show promise for creating advanced functional responsive materials.

Keywords:
cellulose nanocrystalscholesteric microgelsmicroreactorsnanoparticlesresponsive materials

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Supramolecular Chemistry

Background:

  • Cellulose nanocrystals (CNCs) are promising building blocks for advanced materials.
  • Stimulus-responsive materials are crucial for various technological applications.
  • Microgels offer unique properties as confined reaction environments.

Purpose of the Study:

  • To develop novel composite stimulus-responsive cholesteric microgels.
  • To investigate the self-organization of CNCs within spherical confinement.
  • To explore the catalytic activity and microreactor potential of these CNC-based microgels.

Main Methods:

  • Fabrication of microgels using filamentous cellulose nanocrystals (CNCs).
  • Characterization of microgel dimensions and cholesteric pitch response to environmental stimuli.
  • Evaluation of microgel performance in catalytic hydrolysis and metal nanoparticle synthesis.

Main Results:

  • Successfully synthesized stimulus-responsive cholesteric microgels from CNCs.
  • Demonstrated tunable microgel dimensions and pitch based on ambient conditions and polymer interactions.
  • Confirmed the microgels' excellent structural integrity and catalytic activity as microreactors.
  • Showcased the synthesis of metal nanoparticles within the microgel structure.

Conclusions:

  • The developed CNC-based microgels exhibit tunable, stimulus-responsive properties.
  • These microgels function effectively as microreactors for catalytic processes.
  • The self-organization of CNCs in spherical confinement leads to cholesteric morphology.
  • The material holds significant potential for designing advanced functional responsive materials.