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An automated two-phase system for hydrogel microbead production.

Daniela F Coutinho1, Amir F Ahari, Nezamoddin N Kachouie

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A novel two-phase system efficiently produces uniform polymeric microbeads from gellan gum or alginate for drug delivery and cell therapy applications. This adaptable method encapsulates bioactive materials, offering potential for advanced biomedical carriers.

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Area of Science:

  • Biomaterials Science
  • Polymer Chemistry
  • Biomedical Engineering

Background:

  • Polymeric microbeads are crucial for protecting and delivering bioactive materials like drugs and cells in various biomedical applications.
  • Existing methods for producing microbeads can be limited in scope or adaptability for diverse bioactive payloads.

Purpose of the Study:

  • To present a versatile two-phase system for producing uniform polymeric microbeads using gellan gum or alginate.
  • To demonstrate the system's adaptability for encapsulating different bioactive materials, including cells and fluorescent particles.
  • To establish control over microbead size and morphology through system parameter optimization.

Main Methods:

  • A two-phase system combining in situ polymerization and phase separation was developed.
  • Polymer droplets were dispensed via syringe pump and formed microbeads in a hydrophobic phase.
  • Crosslinking and stabilization occurred in a hydrophilic phase at the hydrophobic-hydrophilic interface.

Main Results:

  • The system successfully produced uniform polymeric microbeads of gellan gum and alginate.
  • Microbead size was controllable by adjusting system parameters like needle size and flow rate.
  • Encapsulation of fluorescent beads, cell suspensions, and cell aggregates was achieved, demonstrating carrier potential.

Conclusions:

  • The presented two-phase system offers a generic and adaptable approach for creating polymeric microbeads.
  • The system's ability to encapsulate diverse bioactive materials makes it suitable for drug delivery and cell therapy.
  • Uniformity and controlled production of microbeads are key advantages for biomedical applications.