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Abstract:

Films based on polylactic acid (PLA) reinforced with multi-walled carbon nanotubes (MWCNT) were developed after using an excellent methodology to ensure an optimum dispersion of the filler in the matrix. The functionalization of MWCNT was carried out through a Fenton reaction to generate hydroxyl (OH) and carboxyl (COOH) groups on their walls. After that, COOH groups were lengthened by reacting with thionyl chloride and then with triethylene glycol to achieve a terminal OH distanced from the wall of the MWCNT. Nanocomposites based on PLA containing different concentrations of functionalized filler (fMWCNT: 0.026, 0.10, and 0.18 wt%) were prepared by casting. The influence of filler concentration was investigated using some techniques such as scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), water vapor permeability (WVP) and uniaxial tensile mechanical properties. Excellent dispersion of fMWCNT was observed suggesting that the technique of functionalization used was appropriate. All nanocomposites presented great stability, allowing them to be processed to temperatures reaching 300°C. Furthermore, an increasing trend of ultimate tensile strength (σu) up to 20% and a decrease of WVP around 40% with the addition of only 0.10 wt% of fMWCNT were obtained. Considering these results, the new biodegradable nanocomposites developed in this work could be very promising to replace synthetic plastics that currently are used in different areas such as nanotechnology, packaging and biomedicine. POLYM. COMPOS., 37:3066–3072, 2016. © 2015 Society of Plastics Engineers. © 2015 Society of Plastics Engineers

Registro:

Documento: Artículo
Título:Promising PLA-functionalized MWCNT composites to use in nanotechnology
Autor:Seligra, P.G.; Lamanna, M.; Famá, L.
Filiación:LPMC, Dep. de Física, Facultad de Ciencias Exactas y Naturales and IFIBA-CONICET, Universidad de Buenos Aires, Ciudad Universitaria (C1428EHA), Buenos Aires, Argentina
Palabras clave:Biodegradable polymers; Carbon films; Chlorine compounds; Dispersions; Fillers; Fourier transform infrared spectroscopy; Mechanical permeability; Mechanical properties; Nanocomposites; Nanotechnology; Reinforced plastics; Scanning electron microscopy; Tensile strength; Thermogravimetric analysis; Yarn; Biodegradable nanocomposites; Filler concentration; Fourier transform infra red (FTIR) spectroscopy; Functionalizations; Functionalized-MWCNT; Triethylene glycol; Ultimate tensile strength; Water vapor permeability; Multiwalled carbon nanotubes (MWCN)
Año:2016
Volumen:37
Número:10
Página de inicio:3066
Página de fin:3072
DOI: http://dx.doi.org/10.1002/pc.23504
Título revista:Polymer Composites
Título revista abreviado:Polym Compos
ISSN:02728397
CODEN:PCOMD
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02728397_v37_n10_p3066_Seligra

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Citas:

---------- APA ----------
Seligra, P.G., Lamanna, M. & Famá, L. (2016) . Promising PLA-functionalized MWCNT composites to use in nanotechnology. Polymer Composites, 37(10), 3066-3072.
http://dx.doi.org/10.1002/pc.23504
---------- CHICAGO ----------
Seligra, P.G., Lamanna, M., Famá, L. "Promising PLA-functionalized MWCNT composites to use in nanotechnology" . Polymer Composites 37, no. 10 (2016) : 3066-3072.
http://dx.doi.org/10.1002/pc.23504
---------- MLA ----------
Seligra, P.G., Lamanna, M., Famá, L. "Promising PLA-functionalized MWCNT composites to use in nanotechnology" . Polymer Composites, vol. 37, no. 10, 2016, pp. 3066-3072.
http://dx.doi.org/10.1002/pc.23504
---------- VANCOUVER ----------
Seligra, P.G., Lamanna, M., Famá, L. Promising PLA-functionalized MWCNT composites to use in nanotechnology. Polym Compos. 2016;37(10):3066-3072.
http://dx.doi.org/10.1002/pc.23504