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Graphite nanoplatelets-modified PLA/PCL: effect of blend ratio and nanofiller localization on structure and properties

SYSNO ASEP	0473963
Druh ASEP	J - Článek v odborném periodiku
Zařazení RIV	J - Článek v odborném periodiku
Poddruh J	Článek ve WOS
Název	Graphite nanoplatelets-modified PLA/PCL: effect of blend ratio and nanofiller localization on structure and properties
Tvůrce(i)	Kelnar, Ivan (UMCH-V)_{RID, ORCID} Kratochvíl, Jaroslav (UMCH-V)_RID Kaprálková, Ludmila (UMCH-V) Zhigunov, Alexander (UMCH-V)_{RID, ORCID} Nevoralová, Martina (UMCH-V)_{RID, ORCID}
Zdroj.dok.	Journal of the Mechanical Behavior of Biomedical Materials. - : Elsevier - ISSN 1751-6161 Roč. 71, July (2017), s. 271-278
Poč.str.	8 s.
Jazyk dok.	eng - angličtina
Země vyd.	NL - Nizozemsko
Klíč. slova	poly (epsilon-caprolactone) ; poly (lactic acid) ; graphite nanoplatelets
Vědní obor RIV	JI - Kompozitní materiály
Obor OECD	Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics
CEP	GA16-03194S GA ČR - Grantová agentura ČR
Institucionální podpora	UMCH-V - RVO:61389013
UT WOS	000401880900030
EID SCOPUS	85016394212
DOI	10.1016/j.jmbbm.2017.03.028
Anotace	Structure and properties of poly(lactic acid) (PLA)/poly (epsilon-caprolactone) (PCL) influenced by graphite nanoplatelets (GNP) were studied in dependence on blend composition. Electron microscopy indicates predominant localization of GNP in PCL. GNP-induced changes in viscosity hinder refinement of PCL inclusions, support PCL continuity in the co-continuous system, and lead to reduction of PLA inclusions size without GNP being present at the interface in the PCL-matrix blend. Negligible differences in crystallinity of both phases indicate that mechanical behaviour is mainly influenced by reinforcement and GNP-induced changes in morphology. Addition of 5 parts of GNP leads to ~40% and ~25% increase of stiffness in the PCL- and PLA-matrix systems, respectively, whereas the reinforcing effect is practically eliminated in the co-continuous systems due to GNP-induced lower continuity of PLA which enhances toughness. Impact resistance of the 80/20 blend shows increase with 5 parts content due to synergistic effect of PCL/GNP stacks, whereas minor increase in the blend of the ductile PCL matrix with brittle PLA inclusions is caused by GNP-modification of the component parameters. Results indicate high potential of GNP in preparing biocompatible systems with wide range of structure and properties.
Pracoviště	Ústav makromolekulární chemie
Kontakt	Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358
Rok sběru	2018

Počet záznamů: 1