Macroporous alumina scaffolds consisting of highly microporous hollow filaments using three-dimensional ceramic/camphene-based co-extrusion

Young Wook Moon, Ik Jun Choi, Young-Hag Koh, Hyoun Ee Kim

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

This study proposes a novel type of macroporous ceramic scaffolds, which are comprised of hollow tubular filaments with a highly microporous structure, using 3-dimensional ceramic/camphene-based co-extrusion (3D-CoEx). The use of an initial feedrod, comprised of a camphene core and an alumina/camphene shell, enabled the construction of hollow tubular frameworks and micropores through the removal of the camphene phase. The produced scaffolds showed 3-dimensionally interconnected macropores with dimensions of 250-300. μm. ×. 400-550. μm, which were surrounded by hollow alumina filaments (500. μm in diameter) featuring a number of micropores (several tens of microns in size). This unique macro/micro-porous structure could achieve a combination of both the reasonably high compressive strength of ~5.4. MPa and very high porosity of 86. vol%. In addition, the final mechanical properties and overall porosity of the porous alumina scaffolds could be fine-tuned by adjusting initial alumina content in the alumina/camphene.

Original languageEnglish
Article number10252
Pages (from-to)4623-4627
Number of pages5
JournalJournal of the European Ceramic Society
Volume35
Issue number16
DOIs
Publication statusPublished - 2015 Dec 1

Keywords

  • AlO
  • Biomedical applications
  • Extrusion
  • Mechanical properties
  • Porous ceramics

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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