Detail publikace
Příprava a charakterizace skafoldů na bázi Bioglass(R) bioskla, vyztuženého kompozitním povlakem polyvinylalkoholu-mikrovláknové celulózy
BERTOLLA, L. DLOUHÝ, I. BOCCACCINI, A.
Český název
Příprava a charakterizace skafoldů na bázi Bioglass(R) bioskla, vyztuženého kompozitním povlakem polyvinylalkoholu-mikrovláknové celulózy
Anglický název
Preparation and characterization of Bioglass(R)-based scaffolds reinforced bypoly-vinyl alcohol/microfibrillated cellulose composite coating
Typ
článek v časopise ve Web of Science, Jimp
Jazyk
en
Originální abstrakt
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
Český abstrakt
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.
Anglický abstrakt
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
Klíčová slova česky
skefoldy, biosklo, kompozitni povlaky, pevnost v tlaku, pevnost v tahu
Klíčová slova anglicky
bioglass scaffolds, composite coating, compression strength, tensile strength
Rok RIV
2014
Vydáno
01.05.2014
Nakladatel
Elsevier
ISSN
0955-2219
Ročník
34
Číslo
14
Strany od–do
3379–3387
Počet stran
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"
}