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Electrospun Magnetic Ionic Liquid Based Electroactive Materials for Tissue Engineering Applications.

Liliana C Fernandes1,2, Rafaela M Meira1,2,3, Daniela M Correia4

  • 1Physics Centre of Minho and Porto Universities (CF-UM-UP), University of Minho, 4710-057 Braga, Portugal.

Nanomaterials (Basel, Switzerland)
|September 9, 2022
PubMed
Summary
This summary is machine-generated.

Researchers developed novel magnetic ionic liquid fibers using poly(vinylidene fluoride) that respond to magnetic fields. These magneto-ionic fibers show tunable magnetic properties and altered polymer phase content, with potential applications in active microenvironments.

Keywords:
electroactive materialselectrospun fibersionic liquidspiezoelectric polymerstissue engineering

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Area of Science:

  • Materials Science
  • Polymer Science
  • Nanotechnology

Background:

  • Functional electrospun fibers offer advanced material properties.
  • Ionic liquids (ILs) can be integrated into polymers for novel functionalities.
  • Magnetic response in materials is typically achieved using magnetic particles.

Purpose of the Study:

  • To develop magnetically responsive fibers using magnetic ionic liquids (MILs) without magnetic particles.
  • To investigate the effect of MIL incorporation on the properties of poly(vinylidene fluoride) (PVDF) electrospun fibers.
  • To characterize the magnetic, structural, thermal, and cytotoxic properties of the developed composite fibers.

Main Methods:

  • Electrospinning of poly(vinylidene fluoride) (PVDF) with varying wt.% of a magnetic ionic liquid (MIL), bis(1-butyl-3-methylimidazolium) tetrathiocyanatocobaltate ([Bmim]2[(SCN)4Co]).
  • Analysis of the polar β-phase content and crystallinity of the PVDF/MIL fibers using techniques such as FTIR and XRD.
  • Measurement of fiber magnetization as a function of MIL content and temperature.
  • Assessment of thermal stability using thermogravimetric analysis (TGA).
  • Cytotoxicity assays to evaluate cell viability.

Main Results:

  • Incorporation of MIL increased the polar β-phase content of PVDF from 79% to 94%.
  • Fiber crystallinity decreased from 47% to 36% with increasing MIL content.
  • Fiber magnetization was proportional to MIL content and decreased with temperature.
  • Thermal stability of the fibers decreased upon MIL incorporation.
  • Cytotoxicity assays indicated reduced cell viability with higher MIL concentrations.

Conclusions:

  • Magneto-ionic fibers based on PVDF and a magnetic IL were successfully fabricated.
  • The composite fibers exhibit tunable magnetic responsiveness dependent on MIL content.
  • MIL incorporation significantly alters the structural and thermal properties of PVDF fibers.
  • The study highlights the potential of MIL-containing electrospun fibers for active microenvironments, with considerations for cytotoxicity.