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Biocompatible thermo- and magneto-responsive shape-memory polyurethane bionanocomposites.

Tamara Calvo-Correas1, Anuja Shirole2, Federica Crippa2

  • 1'Materials + Technologies' Research Group (GMT), Department of Chemical and Environmental Engineering, Faculty of Engineering of Gipuzkoa, University of the Basque Country, Pza Europa 1, Donostia-San Sebastian 20018, Spain.

Materials Science & Engineering. C, Materials for Biological Applications
|January 26, 2019
PubMed
Summary

New bio-based polyurethane bionanocomposites with magnetite nanoparticles show excellent shape-memory properties. These thermo- and magneto-responsive materials are suitable for biomedical applications due to their benign nature.

Keywords:
Bio-based polyurethaneBiocompatibilityBionanocompositesMagnetite nanoparticlesMagneto-responsiveShape-memory

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Area of Science:

  • Materials Science
  • Polymer Science
  • Nanotechnology

Background:

  • Bio-based polyurethanes offer sustainable alternatives to petroleum-based polymers.
  • Shape-memory polymers (SMPs) can recover their original shape upon stimulation.
  • Magnetite nanoparticles can impart magnetic responsiveness and alter material properties.

Purpose of the Study:

  • To prepare and characterize thermo- and magneto-responsive shape-memory bionanocomposites.
  • To investigate the influence of magnetite nanoparticles on polyurethane matrix properties.
  • To evaluate the potential of these bionanocomposites for biomedical applications.

Main Methods:

  • Synthesis of bio-based polyurethane.
  • Incorporation of magnetite nanoparticles into the polyurethane matrix.
  • Characterization of thermal, mechanical, and shape-memory properties.
  • Assessment of magnetic responsiveness and cytotoxicity.

Main Results:

  • Magnetite nanoparticles interacted with the polyurethane matrix, reducing crystallinity but minimally affecting mechanical properties.
  • The bionanocomposites exhibited enhanced shape fixity and shape recovery.
  • Materials displayed magnetic behavior, enabling rapid shape recovery via alternating magnetic fields.
  • Preliminary tests indicated good cytotoxicity, hemocompatibility, and cell adhesion.

Conclusions:

  • The developed bionanocomposites possess tunable thermo- and magneto-responsive shape-memory capabilities.
  • Magnetite nanoparticles enhance shape-memory performance and enable magnetic actuation.
  • The materials show promise for advanced biomedical applications requiring responsive and biocompatible materials.