UV curing–assisted 3D plotting of core-shelled feedrod for macroporous hydroxyapatite scaffolds comprised of microporous hollow filaments

Jong Won Jeon, Woo Youl Maeng, Hyun Lee, Young Hag Koh, Hyoun Ee Kim

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

The present study demonstrates the manufacturing of macroporous hydroxyapatite (HA) scaffolds, comprised of microporous hollow filaments with high shape retention, by UV curing-assisted 3D plotting using a feedrod comprised of a photocurable HA shell and a carbon black (CB) core. Two types of scaffolds with different filament interspaces (0.5 mm and 1 mm) were produced by depositing core-shelled filaments extruded through a 1.07-mm-diameter nozzle with in situ polymerization process. Both scaffolds exhibited that the hollow HA filaments were produced after the removal of CB core by heat-treatment, while micropores in the HA walls were created as the replica of camphene-camphor crystals. Overall porosity and macroporosity obtained using a camphene-camphor content of 60 vol% increased from 74.3 vol% to 79.3 vol% and from 50.7 vol% and 64.6 vol%, respectively, with an increase in filament interspace sizes from 0.5 mm to 1 mm. Both scaffolds exhibited reasonably high compressive strengths (2.36 ― 3.58 MPa) and modulus (68–86 MPa).

Original languageEnglish
Pages (from-to)6729-6737
Number of pages9
JournalJournal of the European Ceramic Society
Volume41
Issue number13
DOIs
Publication statusPublished - 2021 Oct

Keywords

  • Additive manufacturing
  • Microporous filament
  • Photopolymerization
  • Pore-forming agent
  • Porous ceramic

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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