Year: 2015
Type: article
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
Source: Polymer Composites
DOI: 10.1002/pc.23504
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: bronze
Awards: G122427810, G1279688354, G1294427244, G1373453167, G141581998, G1497287268, G1749582307, G2150085346, G236507789, G241683532, G2439265903, G2526850531, G2794564233, G2811493840, G2892503380, G3339242433, G3386563612, G3650415161, G380550198, G3934275621, G4259177087, G4650437455, G516874869, G578827938, G6213503948, G6355150407, G6368171892, G6392863384, G6531919598, G6779458453, G7378882120, G7806452396, G7868366600, G7916693977, G841842749, Nanocompuestos de base almidon con aplicaciones en envases biodegradables y compostables, Nanocompuestos de base almidon con aplicaciones en envases biodegradables, G917057079
OpenAlex ID: W2016254161