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Engineering Electrospun Nanostructured Coatings on Macroscopic Particles.

Majid N Soltani1,2, Rebecca V McQuillan1,2, Omid Mazaheri1,2

  • 1Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria 3010, Australia.

ACS Applied Materials & Interfaces
|January 19, 2026
PubMed
Summary
This summary is machine-generated.

Electrospinning now coats complex particle shapes, enhancing fertilizer release control. These advanced coatings offer uniform coverage and reduced permeability for better agricultural applications.

Keywords:
controlled releaseelectrospinningfertilizermacroscopic particle coatingurea coating

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Area of Science:

  • Materials Science
  • Chemical Engineering
  • Polymer Science

Background:

  • Electrospinning is a versatile technique for producing coatings with enhanced properties.
  • Coating non-planar surfaces, like particles, presents significant challenges compared to planar substrates.
  • Developing controlled-release systems is crucial for efficient agricultural practices.

Purpose of the Study:

  • To engineer electrospun coatings on macroscopic particles.
  • To investigate the morphology, mechanical, and release properties of these coatings.
  • To evaluate the potential of electrospun coatings as controlled-release fertilizers.

Main Methods:

  • Utilized electrospinning with biodegradable polymers (beeswax, polycaprolactone) on various particles (urea granules, steel balls, glass beads, zeolite).
  • Controlled coating morphology (beads, fibers, or mixtures) by adjusting instrument and solution parameters.
  • Assessed coating properties including mechanical strength, hydrophobicity, water vapor permeability, and urea release kinetics.

Main Results:

  • Achieved uniform electrospun coating coverage on diverse particle surfaces.
  • Demonstrated tunable coating morphologies.
  • Observed significantly lower water vapor permeability (0.08 × 10-7 g m h-1 m-2 Pa-1) compared to spray coatings (0.13 × 10-7 g m h-1 m-2 Pa-1).
  • Extended urea release duration from 12 to 26 days, indicating controlled-release behavior.

Conclusions:

  • Electrospinning is a viable method for coating non-planar particles with tunable properties.
  • Engineered electrospun coatings offer superior uniformity and reduced permeability.
  • These coatings show promise for developing effective controlled-release fertilizer systems.