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Dasan, Arish and Elsayed, Hamada and Kraxner, Jozef and Galusek, Dusan and Colombo, Paolo and Bernardo, Enrico (2020) Engineering of silicone-based mixtures for the digital light processing of Ã…kermanite scaffolds. [Online journal papers]

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Abstract (italian or english)

Silicones mixed with oxide fillers are interesting precursors for several bioactive glass-ceramics. A key point is represented by the coupling of synthesis and shaping, since highly porous bodies, in form of foams or scaffolds, are first manufactured with silicones in the polymeric state, at low temperature, and later subjected to ceramic transformation. After successful application of direct ink writing, the present study illustrates the tuning of silicone-based mixtures in order to form åkermanite (Ca2MgSi2O7) reticulated scaffolds by digital light processing. This implied the selection of commercial silicones, producing stable and homogeneous blends with a photocurable resin and enabling the manufacturing of defect-free printed scaffolds, before and after firing, without fillers. The blends were further refined with the introduction of fillers, followed by firing at 1100 °C, in air. Optimized samples (from H44 resin) and reactive fillers (including up to 4.5 wt.% borax additive), led to crack-free and phase-pure scaffolds with microporous struts.

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EPrint type:Online journal papers
Anno di Pubblicazione:July 2020
Key Words:Ã…kermanite, 3D scaffolds, Polymer-derived ceramics, Additive manufacturing, Digital light processing
Settori scientifico-disciplinari MIUR:Area 09 - Ingegneria industriale e dell'informazione > ING-IND/22 Scienza e tecnologia dei materiali
Struttura di riferimento:Dipartimenti > Dipartimento di Ingegneria Industriale
Codice ID:13050
Depositato il:05 Oct 2020 11:15
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