Publication detail

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

BERTOLLA, L. DLOUHÝ, I. BOCCACCINI, A.

Czech title

Příprava a charakterizace skafoldů na bázi Bioglass(R) bioskla, vyztuženého kompozitním povlakem polyvinylalkoholu-mikrovláknové celulózy

English title

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

Type

journal article in Web of Science

Language

en

Original abstract

The present work deals with the preparation and mechanical characterization of Bioglass(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

Czech abstract

Práce se zabývá přípravou a charakterizací mechanických vlastnsotí porézního skefoldu z Bioskla, vyztuženého kompozitním povlakem tvořeným matricí polyvinylalkoholu (PVA) a mikrovláken celulozy (MFC). Vzorky byly prřipraveny replikační metodou za použití nově navženého postupu využivájícího břečku na báyi etylalkoholu. Kompoyitní povlak vedl k 10 násobnému yvýšení pevnosti v tlaku a 20 násobnému yvýšení pevnsoti v tahu v porovnání se skefoldy bez povlaku. SEM snímky potvrdily zhouževnaťující mechanismy typu přemostění trhliny prostřednictvím fibril celululózy.

English abstract

The present work deals with the preparation and mechanical characterization of Bioglass(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

Keywords in Czech

skefoldy, biosklo, kompozitni povlaky, pevnost v tlaku, pevnost v tahu

Keywords in English

bioglass scaffolds, composite coating, compression strength, tensile strength

RIV year

2014

Released

01.05.2014

Publisher

Elsevier

ISSN

0955-2219

Volume

34

Number

14

Pages from–to

3379–3387

Pages count

9

BIBTEX


@article{BUT113323,
  author="Luca {Bertolla} and Ivo {Dlouhý} and Aldo {Boccaccini},
  title="Preparation and characterization of Bioglass(R)-based scaffolds reinforced bypoly-vinyl alcohol/microfibrillated cellulose composite coating",
  year="2014",
  volume="34",
  number="14",
  month="May",
  pages="3379--3387",
  publisher="Elsevier",
  issn="0955-2219"
}