Photocurable ceramic/monomer feedstocks containing terpene crystals as sublimable porogen for UV curing-assisted 3D plotting

This study presents a novel strategy to construct ceramic structures comprised of microporous filaments using photocurable ceramic/monomer feedstocks containing terpene crystals as sublimable porogens for UV curing-assisted 3D plotting technique. The biphasic calcium phosphate (BCP) feedstock, compo...

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Bibliographic Details
Published in:Journal of the European Ceramic Society 2020-08, Vol.40 (9), p.3469-3477
Main Authors: Maeng, Woo-Youl, Jeon, Jong-Won, Lee, Jung-Bin, Lee, Hyun, Koh, Young-Hag, Kim, Hyoun-Ee
Format: Article
Language:English
Subjects:
Additive manufacturing
Hierarchical porous ceramic
Microporous filament
Photopolymerization
Porogen
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Summary:This study presents a novel strategy to construct ceramic structures comprised of microporous filaments using photocurable ceramic/monomer feedstocks containing terpene crystals as sublimable porogens for UV curing-assisted 3D plotting technique. The biphasic calcium phosphate (BCP) feedstock, composed of frozen terpene crystals surrounded by BCP/UDMA walls, could be favorably extruded through a fine nozzle and then effectively photopolymerized by UV light. Thus, green filaments with high shape retention could be obtained. In addition, a number of pores could be created in BCP filaments after removing terpene crystals via freeze-drying and the porosity could be tailored by adjusting terpene content in BCP feedstocks. This approach allowed for the construction of dual-scale porous structures comprising microporous filaments in a periodic pattern, with tailored overall porosities and compressive strengths. Several types of self-supporting structures were also successfully constructed using our approach.
ISSN:0955-2219
1873-619X
DOI:10.1016/j.jeurceramsoc.2020.03.047