4.6 Article

Polymer-Derived Biosilicate®-like Glass-Ceramics: Engineering of Formulations and Additive Manufacturing of Three-Dimensional Scaffolds

期刊

MATERIALS
卷 14, 期 18, 页码 -

出版社

MDPI
DOI: 10.3390/ma14185170

关键词

Biosilicate (R) glass-ceramic; polymer-derived ceramics; SiOC; additive manufacturing; direct ink writing; digital light processing

资金

  1. European Union [739566]

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Silicone resins filled with phosphates and oxide fillers can be fired at high temperatures to produce glass-ceramic products for tissue engineering applications. This technology allows for direct ink writing of silicone-based mixtures at room temperature, followed by thermal treatment for conversion into ceramics.
Silicone resins, filled with phosphates and other oxide fillers, yield upon firing in air at 1100 degrees C, a product resembling Biosilicate (R) glass-ceramics, one of the most promising systems for tissue engineering applications. The process requires no preliminary synthesis of parent glass, and the polymer route enables the application of direct ink writing (DIW) of silicone-based mixtures, for the manufacturing of reticulated scaffolds at room temperature. The thermal treatment is later applied for the conversion into ceramic scaffolds. The present paper further elucidates the flexibility of the approach. Changes in the reference silicone and firing atmosphere (from air to nitrogen) were studied to obtain functional composite biomaterials featuring a carbon phase embedded in a Biosilicate (R)-like matrix. The microstructure was further modified either through a controlled gas release at a low temperature, or by the revision of the adopted additive manufacturing technology (from DIW to digital light processing).

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