@article{5ad6355f36e04939bc75e6e33c20eebc,
title = "Synergistic Effect of Graphene Nanoplatelets and Multiwall Carbon Nanotubes Incorporated in PLA Matrix: Nanoindentation of Composites with Improved Mechanical Properties",
abstract = "The synergistic effect of two carbon nanofillers on the mechanical properties of PLA-based nanocomposites was investigated in the present work. Polylactic acid is relatively brittle semi-crystalline polymer which was selected for composite matrix because of its biodegradable properties. It was reinforced with graphene nanoplatelets and multiwall carbon nanotubes by means of melt mixing preparation method. Nanohardness and Young{\textquoteright}s modulus of smooth nanocomposite samples received by 3D printing were defined by nanoindentation experiments using Berkovich-type pyramidal nanoindenter. It was found that the compounds, incorporated with both graphene and carbon nanotubes in the polymer structure, exhibit better mechanical performance compared to the nanocomposites loaded with a single carbon nanofiller. Different techniques of sample preparation were applied in order to see the influence of preliminary processing on the nanomechanical properties of composite specimens. X-ray diffraction and Raman spectroscopy were used to study the structural features of the pristine carbon nanomaterials.",
keywords = "carbon nanofillers, composites, nanoindentation, nanoscratch, polylactic acid, structure analysis, synergism",
author = "Todor Batakliev and Vladimir Georgiev and Verislav Angelov and Evgeni Ivanov and Cristiane Kalupgian and Mu{\~n}oz, {Pablo A.R.} and Fechine, {Guilhermino J.M.} and Andrade, {Ricardo J.E.} and Rumiana Kotsilkova",
note = "Funding Information: This work has received funding by the European Union{\textquoteright}s Horizon 2020-MSCA-RISE-734164 Graphene 3D Project and by the H2020-FET-Graphene Flagship-881603 Graphene Core 3 Project. The authors from Institute of Mechanics would like to acknowledge the contribution of the Bilateral collaboration between IMech, BAS and IPCB-CNR, Napoli/Portici (2019-2021). This study has also been accomplished with the financial support by the Grant No BG05M2OP001-1.002-0011, financed by the Science and Education for Smart Growth Operational Program (2014-2020) and co-financed by the European Union through the European structural and Investment funds. Funding Information: This work has received funding by the European Union?s Horizon 2020-MSCA-RISE-734164 Graphene 3D Project and by the H2020-FET-Graphene Flagship-881603 Graphene Core 3 Project. The authors from Institute of Mechanics would like to acknowledge the contribution of the Bilateral collaboration between IMech, BAS and IPCB-CNR, Napoli/Portici (2019-2021). This study has also been accomplished with the financial support by the Grant No BG05M2OP001-1.002-0011, financed by the Science and Education for Smart Growth Operational Program (2014-2020) and co-financed by the European Union through the European structural and Investment funds. Publisher Copyright: {\textcopyright} 2021, ASM International.",
year = "2021",
month = may,
doi = "10.1007/s11665-021-05679-3",
language = "English",
volume = "30",
pages = "3822--3830",
journal = "Journal of Materials Engineering and Performance",
issn = "1059-9495",
publisher = "Springer New York",
number = "5",
}