Publication detail

Mechanical reinforcement of Bioglass (R)-based scaffolds by novel polyvinyl-alcohol/microfibrillated cellulose composite coating

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

Czech title

Mechanické vyztužení skafoldů na bázi Bioglass (R) pomocí nového kompozitního povlaku na bázi PVA/MFC

English title

Mechanical reinforcement of Bioglass (R)-based scaffolds by novel polyvinyl-alcohol/microfibrillated cellulose composite coating

Type

journal article in Web of Science

Language

en

Original abstract

The preparation and mechanical properties of Bioglasss-based porous scaffolds reinforced by a composite coating constituted by polyvinyl alcohol (PVA) and microfibrillated cellulose (MFC) are investigated. Samples produced by foam replication process and having nominally 90% of open porosity were coated by dipping into an aqueous solution of PVA and MFC. Tensile tests were conducted on samples according to a new testing methodology optimized for highly porous ceramics. The addition of PVA/MFC coating led to a 10 fold increase of the tensile strength of scaffolds. The reinforcing and toughening effect of the composite coating due to crack bridging and fracture of cellulose fibrils embedded in the PVA matrix was proved by SEM observations.

Czech abstract

The preparation and mechanical properties of Bioglasss-based porous scaffolds reinforced by a composite coating constituted by polyvinyl alcohol (PVA) and microfibrillated cellulose (MFC) are investigated. Samples produced by foam replication process and having nominally 90% of open porosity were coated by dipping into an aqueous solution of PVA and MFC. Tensile tests were conducted on samples according to a new testing methodology optimized for highly porous ceramics. The addition of PVA/MFC coating led to a 10 fold increase of the tensile strength of scaffolds. The reinforcing and toughening effect of the composite coating due to crack bridging and fracture of cellulose fibrils embedded in the PVA matrix was proved by SEM observations.

English abstract

The preparation and mechanical properties of Bioglasss-based porous scaffolds reinforced by a composite coating constituted by polyvinyl alcohol (PVA) and microfibrillated cellulose (MFC) are investigated. Samples produced by foam replication process and having nominally 90% of open porosity were coated by dipping into an aqueous solution of PVA and MFC. Tensile tests were conducted on samples according to a new testing methodology optimized for highly porous ceramics. The addition of PVA/MFC coating led to a 10 fold increase of the tensile strength of scaffolds. The reinforcing and toughening effect of the composite coating due to crack bridging and fracture of cellulose fibrils embedded in the PVA matrix was proved by SEM observations.

Keywords in Czech

skefoldy z bioskla; tahová zkouška; polymerní povlak, keramická pěna

Keywords in English

bioglass scaffolds, tensile test, polymer coating, ceramic foams

RIV year

2014

Released

01.03.2014

Publisher

Elsevier

ISSN

0167-577X

Volume

118

Number

3

Pages from–to

204–207

Pages count

4

BIBTEX


@article{BUT113324,
  author="Luca {Bertolla} and Ivo {Dlouhý} and Anahi {Philippart} and Aldo {Boccaccini},
  title="Mechanical reinforcement of Bioglass (R)-based scaffolds by novel polyvinyl-alcohol/microfibrillated cellulose composite coating",
  year="2014",
  volume="118",
  number="3",
  month="March",
  pages="204--207",
  publisher="Elsevier",
  issn="0167-577X"
}