Nanoindentation analysis of 3D printed poly(lactic acid)-based composites reinforced with graphene and multiwall carbon nanotubes

被引:33
作者
Batakliev, Todor [1 ]
Georgiev, Vladimir [2 ]
Ivanov, Evgeni [1 ,2 ]
Kotsilkova, Rumiana [1 ]
Di Maio, Rosa [3 ]
Silvestre, Clara [3 ]
Cimmino, Sossio [3 ]
机构
[1] Bulgarian Acad Sci, Inst Mech, Open Lab Expt Micro & Nano Mech OLEM, Acad G Bonchev St,Block 4, BU-1113 Sofia, Bulgaria
[2] Res & Dev Nanomat & Nanotechnol NanoTech Lab Ltd, Acad G Bonchev St,Block 4, Sofia 1113, Bulgaria
[3] CNR, IPCB, Via Campi Flegrei 34 Olivetti, I-80078 Pozzuoli, NA, Italy
基金
欧盟地平线“2020”;
关键词
carbon nanotubes; composites; graphene; nanoindentation; poly(lactic acid); 3D printing; MECHANICAL-PROPERTIES; ELASTIC-MODULUS; CONTACT AREA; INDENTATION; PARAMETERS; DISPERSION; HARDNESS;
D O I
10.1002/app.47260
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Influences of different nanocomposite loadings in poly(lactic acid) (PLA) matrix on resulting hardness and elasticity were examined in nanoindentation experiments. The following study was focused on the nanomechanical properties of PLA reinforced with graphene nanoplatelets (GNPs) and multiwall carbon nanotubes (MWCNTs) by using Berkovich type pyramidal nanoindenter. A masterbatch strategy was developed to disperse GNP and MWCNT into PLA by melt blending. Young's modulus and nanohardness of as-prepared nanocomposites were characterized as a function of the graphene and carbon nanotubes loading. The nanoindentation analysis reveals that these carbon nanofillers improve the mechanical stability of the nanocomposites GNP/PLA, MWCNT/PLA, and GNP/MWCNT/PLA. That improvement of mechanical properties strongly depends on the fillers content. It was found that the best mechanical performance was achieved for the compound having 6 wt % graphene and 6 wt % MWCNTs in the PLA matrix. The received values for nanohardness and Young's modulus are among the highest reported for PLA-based nanocomposites. (c) 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47260.
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页数:5
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