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Graphite nanoplatelets-modified PLA/PCL: effect of blend ratio and nanofiller localization on structure and properties
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SYSNO ASEP 0473963 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Graphite nanoplatelets-modified PLA/PCL: effect of blend ratio and nanofiller localization on structure and properties Author(s) 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, ORCIDSource Title Journal of the Mechanical Behavior of Biomedical Materials. - : Elsevier - ISSN 1751-6161
Roč. 71, July (2017), s. 271-278Number of pages 8 s. Language eng - English Country NL - Netherlands Keywords poly (epsilon-caprolactone) ; poly (lactic acid) ; graphite nanoplatelets Subject RIV JI - Composite Materials OECD category Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics R&D Projects GA16-03194S GA ČR - Czech Science Foundation (CSF) Institutional support UMCH-V - RVO:61389013 UT WOS 000401880900030 EID SCOPUS 85016394212 DOI 10.1016/j.jmbbm.2017.03.028 Annotation 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. Workplace Institute of Macromolecular Chemistry Contact Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Year of Publishing 2018
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