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

Authors
Moon, Young-WookChoi, Ik-JunKoh, Young-HagKim, Hyoun-Ee
Issue Date
12월-2015
Publisher
ELSEVIER SCI LTD
Keywords
Extrusion; Porous ceramics; Mechanical properties; Al2O3; Biomedical applications
Citation
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, v.35, no.16, pp.4623 - 4627
Indexed
SCIE
SCOPUS
Journal Title
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
Volume
35
Number
16
Start Page
4623
End Page
4627
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/91665
DOI
10.1016/j.jeurceramsoc.2015.08.017
ISSN
0955-2219
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 similar to 250-300 mu m x 400-550 mu m, which were surrounded by hollow alumina filaments (similar to 500 mu m 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 similar to 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. (C) 2015 Elsevier Ltd. All rights reserved.
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