Robocasting: Prediction of ink printability in solgel bioactive glass

authors	Ben-Arfa, BAE; Neto, AS; Salvado, IMM; Pullar, RC; Ferreira, JMF
nationality	International
journal	JOURNAL OF THE AMERICAN CERAMIC SOCIETY
author keywords	balls to powder ratio; calcination temperature; robocasting; scaffolds; solid loading; suspension rheology
keywords	PARTICLE-SIZE DISTRIBUTION; DRYING-SHRINKAGE BEHAVIOR; SCAFFOLDS; MICROSTRUCTURE; SUSPENSIONS; PACKING
abstract	Bioactive glass powders synthesized by solgel are usually porous and exhibit high specific surface areas, conferring them poor ability for scaffolds fabrication using colloidal processing approaches. The difficulties associated with colloidal processing of solgel glass have hindered so far the processing of 3-D scaffolds by robocasting. This research paper investigates the importance of calcination temperature (CT) and balls to powder ratio (BPR) used upon wet milling on the maximum achievable solid loading in aqueous media. The effects of CT, BPR, and solid loading on the flow behavior and viscoelastic properties of the suspensions/pastes were evaluated in this preliminary work. The aim is to disclose the sets of experimental variables that are most promising for the formulation of printable inks, and open the way for the future fabrication of porous scaffolds by robocasting and other 3-D additive manufacturing techniques.
publisher	WILEY
issn	0002-7820
year published	2019
volume	102
issue	4
beginning page	1608
ending page	1618
digital object identifier (doi)	10.1111/jace.16092
web of science category	Materials Science, Ceramics
subject category	Materials Science
unique article identifier	WOS:000459595500009