Promising PLA-functionalized MWCNT composites to use in nanotechnology
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 (O...
| Autores principales: | , |
|---|---|
| Publicado: |
2016
|
| Materias: | |
| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02728397_v37_n10_p3066_Seligra http://hdl.handle.net/20.500.12110/paper_02728397_v37_n10_p3066_Seligra |
| Aporte de: |
| id |
paper:paper_02728397_v37_n10_p3066_Seligra |
|---|---|
| record_format |
dspace |
| spelling |
paper:paper_02728397_v37_n10_p3066_Seligra2023-06-08T15:25:25Z Promising PLA-functionalized MWCNT composites to use in nanotechnology Lamanna, Melisa Elsa Famá, Lucía Mercedes 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) 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 Fil:Lamanna, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Famá, L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2016 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02728397_v37_n10_p3066_Seligra http://hdl.handle.net/20.500.12110/paper_02728397_v37_n10_p3066_Seligra |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
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) |
| spellingShingle |
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) Lamanna, Melisa Elsa Famá, Lucía Mercedes Promising PLA-functionalized MWCNT composites to use in nanotechnology |
| topic_facet |
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) |
| description |
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 |
| author |
Lamanna, Melisa Elsa Famá, Lucía Mercedes |
| author_facet |
Lamanna, Melisa Elsa Famá, Lucía Mercedes |
| author_sort |
Lamanna, Melisa Elsa |
| title |
Promising PLA-functionalized MWCNT composites to use in nanotechnology |
| title_short |
Promising PLA-functionalized MWCNT composites to use in nanotechnology |
| title_full |
Promising PLA-functionalized MWCNT composites to use in nanotechnology |
| title_fullStr |
Promising PLA-functionalized MWCNT composites to use in nanotechnology |
| title_full_unstemmed |
Promising PLA-functionalized MWCNT composites to use in nanotechnology |
| title_sort |
promising pla-functionalized mwcnt composites to use in nanotechnology |
| publishDate |
2016 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02728397_v37_n10_p3066_Seligra http://hdl.handle.net/20.500.12110/paper_02728397_v37_n10_p3066_Seligra |
| work_keys_str_mv |
AT lamannamelisaelsa promisingplafunctionalizedmwcntcompositestouseinnanotechnology AT famaluciamercedes promisingplafunctionalizedmwcntcompositestouseinnanotechnology |
| _version_ |
1768545140836663296 |