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Researchers successfully used thermoplastic collagen in additive manufacturing (AM) for the first time, creating collagen objects via 3D printing. This innovation opens doors for new collagen-based products in non-medical fields.

Keywords:
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Area of Science:

  • Biomaterials Science
  • Additive Manufacturing
  • Materials Engineering

Background:

  • Thermoplastic collagen, a partially denatured collagen powder, is processable via extrusion and injection molding.
  • Its application in additive manufacturing (AM) techniques was previously unexplored.

Purpose of the Study:

  • To report the first successful application of thermoplastic collagen in an additive manufacturing process.
  • To establish optimal processing conditions for collagen/water/glycerol mixtures in AM.
  • To characterize the properties of the manufactured collagen objects.

Main Methods:

  • Utilized a BioScaffolder 3.2 for the AM process, depositing molten collagen strands.
  • Characterized the collagen melt rheologically to determine optimal processing parameters.
  • Employed PLA/wood composite for support structures in complex geometries.
  • Included post-processing steps like support removal and surface smoothing.

Main Results:

  • Successfully fabricated collagen objects with varying shapes using AM.
  • Established optimal processing conditions for collagen/water/glycerol mixtures.
  • Characterized the manufactured objects for water solubility, swelling behavior, and compressibility.

Conclusions:

  • Additive manufacturing of thermoplastic collagen is feasible and successful.
  • The developed technique allows for the creation of collagen-based objects with tunable properties.
  • Potential applications include collagen-based pet food and customized organ models for medical training.