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Bioglass® Scaffolds Reinforced by a Composite Polyvinyl Alcohol/Microfibrillated Cellulose Coating
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SYSNO ASEP 0435421 Document Type O - Others R&D Document Type Others Title Bioglass® Scaffolds Reinforced by a Composite Polyvinyl Alcohol/Microfibrillated Cellulose Coating Author(s) Bertolla, Luca (UFM-A) ORCID
Dlouhý, Ivo (UFM-A) RID, ORCID
Boccaccini, A. R. (DE)Year of issue 2014 Language eng - English Country US - United States Keywords Bioglass® scaffolds ; Porous materials ; Polymer coating Subject RIV JI - Composite Materials Institutional support UFM-A - RVO:68081723 Annotation The present work deals with the preparation and characterization of Bioglass® porous scaffold reinforced by a composite coating constituted by polyvinyl alcohol and microfibrillated cellulose(MFC). Samples were produced by foam replication process, involving a modified ethanol-based slurry. A structure with nominally 90% of open porosity and ~ 400 µm mean pore size was achieved. The coating was obtained by dipping the samples into an aqueous solution of MFC. Compressive and tensile tests, according to a new testing methodology optimized for highly porous ceramics were carried out. The addition of the coating led to a 40 fold increase of tensile strength and a 10 fold increase of compressive strength. SEM observations on broken struts surfaces proved the reinforcing and toughening effect of the coating due to crack bridging and fracture of cellulose fibrils. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2015 Electronic address http://www.programmaster.org/PM/PM.nsf/ApprovedAbstracts/BF58F3A508FBEFCD85257C760035002B?OpenDocument
Number of the records: 1