Preparation and characterization of Bioglass®-based scaffolds reinforced bypoly-vinyl alcohol/microfibrillated cellulose composite coating

0435367 - ÚFM 2015 RIV NL eng J - Článek v odborném periodiku
Bertolla, Luca - Dlouhý, Ivo - Boccaccini, A. R.
Preparation and characterization of Bioglass®-based scaffolds reinforced bypoly-vinyl alcohol/microfibrillated cellulose composite coating.
Journal of the European Ceramic Society. Roč. 34, č. 14 (2014), s. 3379-3387. ISSN 0955-2219. E-ISSN 1873-619X.
[Fractography of Advanced Ceramics IV. Smolenice Castle Congres Center, Smolenice SAS, 29.09.13-02.10.13]
Grant CEP: GA MŠMT(CZ) ED1.1.00/02.0068
GRANT EU: European Commission(XE) 264526 - GLACERCO
Institucionální podpora: RVO:68081723
Klíčová slova: bioceramcs * bioglass (R) scaffolds * porous materials * polymer coating * composite coating
Kód oboru RIV: JI - Kompozitní materiály
Impakt faktor: 2.947, rok: 2014
http://www.imr.saske.sk/confer/fac2013/publication.htm

The present work deals with the preparation and mechanical characterization of Bioglase (R)-based porous scaffolds reinforced by a composite coating constituted by polyvinyl alcohol (PVA) and microfibrillated cellulose (MFC). Samples were produced by foam replication process, using a novel ethanol-based Bioglass (R) slurry. The addition of PVA/MFC coating led to a 10 fold increase of compressive strength and a 20 fold increase of tensile strength in comparison with non-coated scaffolds. SEM observations of broken struts surfaces proved the reinforcing and toughening effect of the composite coating which were ascribed to crack bridging and fracture of cellulose fibrils. The mechanical properties of the coatings were investigated by tensile testing of PVA/MFC composite stripes. The stirring time of the PVA/MFC solution came out as a crucial parameter in order to achieve a more homogeneous dispersion of the fibers and therefore enhanced strength and stiffness.
Trvalý link: http://hdl.handle.net/11104/0239711