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Electrospinning Fundamentals: Optimizing Solution and Apparatus Parameters
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Electrospinning Fundamentals: Optimizing Solution and Apparatus Parameters

Published on: January 21, 2011

Improving polymer nanofiber quality using a modified co-axial electrospinning process.

Deng-Guang Yu1, Christopher Branford-White, S W Annie Bligh

  • 1College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, China. ydg017@dhu.edu.cn

Macromolecular Rapid Communications
|March 26, 2011
PubMed
Summary
This summary is machine-generated.

This study introduces a modified coaxial electrospinning technique to enhance polymer nanofiber quality. Optimal solvent mixtures significantly improve polyvinylpyrrolidone (PVP) nanofiber structure and surface characteristics.

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Nanotechnology

Background:

  • Electrospinning is a common method for producing polymer nanofibers.
  • Achieving high-quality nanofibers with controlled morphology often requires process optimization.
  • Modified electrospinning techniques can overcome limitations of conventional methods.

Purpose of the Study:

  • To develop a systematic strategy for improving polymer nanofiber quality using modified coaxial electrospinning.
  • To investigate the influence of sheath fluid solvent properties on polyvinylpyrrolidone (PVP) nanofiber characteristics.
  • To identify optimal solvent mixtures for producing high-quality PVP nanofibers.

Main Methods:

  • A modified coaxial electrospinning setup with a concentric spinneret and indented inner capillary was employed.
  • Polyvinylpyrrolidone K60 (PVP K60) in ethanol served as the core fluid.
  • Six different solvents were tested as sheath fluids to evaluate their impact on nanofiber formation.
  • The physical-chemical properties of the solvents were correlated with the resulting nanofiber quality.

Main Results:

  • Polymer nanofiber quality was found to be highly dependent on the physical-chemical properties of the sheath fluid solvents.
  • A specific solvent mixture of acetone, ethanol, and DMAc (3:1:1 v/v/v) yielded high-quality PVP nanofibers.
  • The optimized process produced PVP nanofibers with an average diameter of 130 ± 10 nm, exhibiting homogeneous structures and smooth surfaces.

Conclusions:

  • The modified coaxial electrospinning process, coupled with judicious solvent selection, offers a viable strategy for enhancing polymer nanofiber quality.
  • Understanding solvent-morphology relationships is crucial for tailoring nanofiber properties.
  • This approach enables the production of uniform, smooth nanofibers suitable for various advanced applications.