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Multicompartment polymeric colloids from functional precursor Microgel: Synthesis in continuous process.

Jacek J Walkowiak1, Casper van Duijnhoven2, Pia Boeschen3

  • 1DWI - Leibniz-Institute for Interactive Materials e.V, Forckenbeckstraße 50, 52074 Aachen, Germany; Institute of Technical and Macromolecular Chemistry, RWTH Aachen University, Worringerweg 2, 52074 Aachen, Germany; Aachen-Maastricht Institute for Biobased Materials (AMIBM), Maastricht University, Urmonderbaan 22, 6167 RD Geleen, The Netherlands.

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|December 19, 2022
PubMed
Summary
This summary is machine-generated.

Researchers created raspberry-like patchy particles and complex colloidal clusters using a flow process. This method offers advantages in heat dissipation and light distribution for advanced material fabrication.

Keywords:
Flow chemistryMicrogelNanoparticlePatchy particleSeed polymerization

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Area of Science:

  • Colloid and Polymer Science
  • Materials Chemistry
  • Flow Chemistry

Background:

  • Fabrication of complex colloidal particles often relies on bulk polymerization methods with challenges in heat and light management.
  • Controlling particle morphology and self-assembly is crucial for developing advanced functional materials.

Purpose of the Study:

  • To develop raspberry-like poly(oligoethylene methacrylate-b-N-vinylcaprolactam)/polystyrene (POEGMA-b-PVCL/PS) patchy particles (PPs) and complex colloidal particle clusters (CCPCs) using a flow process.
  • To investigate the influence of polymerization conditions on the structure and morphology of PPs and CCPCs.
  • To leverage the advantages of a tubular flow reactor for surfactant-free photo-initiated reversible addition-fragmentation transfer (RAFT) precipitation polymerization (Photo-RPP).

Main Methods:

  • Fabrication of internally cross-linked POEGMA-b-PVCL microgels via surfactant-free Photo-RPP in a tubular flow reactor.
  • Stabilization of styrene seed droplets by microgel particles to form raspberry-like PPs.
  • Cascade process involving self-assembly of PPs and subsequent polymerization in a Pickering emulsion to form CCPCs.
  • Systematic variation of polymerization parameters including flow rate/retention time (Rt), temperature, and cross-linker concentration.

Main Results:

  • Successfully synthesized raspberry-like PPs and CCPCs with controlled morphology.
  • Demonstrated the self-assembly behavior driven by hydrophobicity differences in the cascade process.
  • Identified the impact of flow rate/Rt, temperature, and cross-linker amount on particle structure.
  • Highlighted the benefits of tubular flow reactors for enhanced heat dissipation and homogeneous light distribution compared to bulk methods.

Conclusions:

  • Flow-based Photo-RPP provides superior control over polymerization and particle morphology.
  • The cascade process enables the formation of complex colloidal structures from simpler building blocks.
  • Tubular flow reactors are advantageous for scalable and efficient synthesis of advanced colloidal materials.