Next Article in Journal
Fabrication and Anti-Oxidation Ability of SiC-SiO2 Coated Carbon Fibers Using Sol-Gel Method
Next Article in Special Issue
Electrospun F18 Bioactive Glass/PCL—Poly (ε-caprolactone)—Membrane for Guided Tissue Regeneration
Previous Article in Journal
Comparison of Commercial Calcium Hydroxide Pastes for Prolonged Antibacterial Effect using a Colourimetric Assessment
Previous Article in Special Issue
Recent Evidence on Bioactive Glass Antimicrobial and Antibiofilm Activity: A Mini-Review
Open AccessFeature PaperArticle

Bioactive Glass-Ceramic Foam Scaffolds from ‘Inorganic Gel Casting’ and Sinter-Crystallization

Department of Industrial Engineering, University of Padova, Via Marzolo 9, 35131 Padova, Italy
Ceramics Department, National Research Centre, El-Bohous Street, Cairo 12622, Egypt
Dipartimento Scienza Applicata e Tecnologia, Politecnico di Torino, 10129 Torino, Italy
Author to whom correspondence should be addressed.
Materials 2018, 11(3), 349;
Received: 11 January 2018 / Revised: 23 February 2018 / Accepted: 24 February 2018 / Published: 27 February 2018
(This article belongs to the Special Issue Bioactive Glasses 2017)
Highly porous bioactive glass-ceramic scaffolds were effectively fabricated by an inorganic gel casting technique, based on alkali activation and gelification, followed by viscous flow sintering. Glass powders, already known to yield a bioactive sintered glass-ceramic (CEL2) were dispersed in an alkaline solution, with partial dissolution of glass powders. The obtained glass suspensions underwent progressive hardening, by curing at low temperature (40 °C), owing to the formation of a C–S–H (calcium silicate hydrate) gel. As successful direct foaming was achieved by vigorous mechanical stirring of gelified suspensions, comprising also a surfactant. The developed cellular structures were later heat-treated at 900–1000 °C, to form CEL2 glass-ceramic foams, featuring an abundant total porosity (from 60% to 80%) and well-interconnected macro- and micro-sized cells. The developed foams possessed a compressive strength from 2.5 to 5 MPa, which is in the range of human trabecular bone strength. Therefore, CEL2 glass-ceramics can be proposed for bone substitutions. View Full-Text
Keywords: CEL2 glass; glass-ceramics; alkali activation; gel casting CEL2 glass; glass-ceramics; alkali activation; gel casting
Show Figures

Figure 1

MDPI and ACS Style

Elsayed, H.; Rincón Romero, A.; Molino, G.; Vitale Brovarone, C.; Bernardo, E. Bioactive Glass-Ceramic Foam Scaffolds from ‘Inorganic Gel Casting’ and Sinter-Crystallization. Materials 2018, 11, 349.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

Back to TopTop