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Novel High-Efficient Method to Generate Fragmented Nano- and Microfibers Enabling an Additive for Bio-Inks.

Margitta Büchner1, Michael Geske1, Michael Redel1

  • 1Institute of Polymer Materials, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany.

Macromolecular Bioscience
|August 6, 2025
PubMed
Summary

This study presents a novel UV irradiation method for controlled fiber fragmentation in biofabrication. This technique enhances bio-ink properties and offers a simple, scalable alternative for tissue engineering applications.

Keywords:
UV lightWeibull distributionelectrospinningfiber fragmentationgelatinpolycaprolactone

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Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Biotechnology

Background:

  • Biofabrication utilizes biopolymers and cells to create tissue mimics.
  • Fiber reinforcement in bio-inks improves mechanical properties and cell viability.
  • Current fiber fragmentation methods are limited by scalability and equipment needs.

Purpose of the Study:

  • To introduce a novel, accessible method for controlled fiber fragmentation in biofabrication.
  • To overcome limitations of existing fiber fragmentation techniques.
  • To enable scalable and cost-effective production of fiber-reinforced bio-inks.

Main Methods:

  • Utilized ultraviolet (UV) irradiation for controlled fiber fragmentation.
  • Applied multi-modal Weibull analysis to estimate average fiber length.
  • Validated the technique on polycaprolactone (PCL) and gelatin blends.

Main Results:

  • UV irradiation provides controlled fiber shortening.
  • Average fiber length can be accurately estimated using Weibull analysis.
  • The method is cost-effective, biocompatible, and simple to implement.

Conclusions:

  • UV irradiation offers a practical solution for fiber fragment production in biofabrication.
  • This technique enhances the accessibility and scalability of fiber-based biofabrication.
  • The developed method supports advancements in tissue engineering and regenerative medicine.