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Direct Ink Writing of a Preceramic Polymer and Fillers to Produce Hardystonite (Ca2ZnSi2O7) Bioceramic Scaffolds

  • The direct ink writing of an ink composed of a preceramic polymer and fillers was used to produce hardystonite (Ca2Zn-Si2O7) bioceramic scaffolds. Suitable formulations were developed for the extrusion of fine filaments (350 µm diameter) through a nozzle. The preceramic polymer was employed with the double purpose of contributing to the rheology of the ink by increasing its viscosity and of forming the hardystonite phase upon heat treatment by reacting with the fillers. A control of the rheology is essential when spanning features have to be produced, and therefore the main rheological characteristics of the inks were measured (flow curves, dynamic oscillation tests, viscosity recovery tests) and compared to models reported in the literature. Highly porous scaffolds (up to 80% total porosity) were produced and heat treated in air or in nitrogen atmosphere. The influence of the heat-treatment atmosphere on the morphology, crystalline phase assemblage, and compressive strength of theThe direct ink writing of an ink composed of a preceramic polymer and fillers was used to produce hardystonite (Ca2Zn-Si2O7) bioceramic scaffolds. Suitable formulations were developed for the extrusion of fine filaments (350 µm diameter) through a nozzle. The preceramic polymer was employed with the double purpose of contributing to the rheology of the ink by increasing its viscosity and of forming the hardystonite phase upon heat treatment by reacting with the fillers. A control of the rheology is essential when spanning features have to be produced, and therefore the main rheological characteristics of the inks were measured (flow curves, dynamic oscillation tests, viscosity recovery tests) and compared to models reported in the literature. Highly porous scaffolds (up to 80% total porosity) were produced and heat treated in air or in nitrogen atmosphere. The influence of the heat-treatment atmosphere on the morphology, crystalline phase assemblage, and compressive strength of the scaffolds was investigated.zeige mehrzeige weniger

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Metadaten
Autoren/innen:Andrea Zocca, Giorgia Franchin, Hamada Elsayed, Emilia Gioffredi, Enrico Bernardo, Paolo Colombo
Dokumenttyp:Zeitschriftenartikel
Veröffentlichungsform:Verlagsliteratur
Sprache:Englisch
Titel des übergeordneten Werkes (Englisch):Journal of the American Ceramic Society
Jahr der Erstveröffentlichung:2016
Organisationseinheit der BAM:5 Werkstofftechnik
5 Werkstofftechnik / 5.4 Keramische Prozesstechnik und Biowerkstoffe
Verlag:Wiley-Blackwell
Jahrgang/Band:6
Ausgabe/Heft:99
Erste Seite:1960
Letzte Seite:1967
Freie Schlagwörter:Bioceramics; Polymer precursor; Porous materials; Processing
Themenfelder/Aktivitätsfelder der BAM:Material
DOI:https://doi.org/10.1111/jace.14213
URL:http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS&DestLinkType=FullRecord;UT=WOS:000384993000021
Verfügbarkeit des Volltexts:Volltext-PDF im Netzwerk der BAM verfügbar ("Closed Access")
Datum der Freischaltung:07.11.2016
Referierte Publikation:Ja
Datum der Eintragung als referierte Publikation:07.11.2016