Please use this identifier to cite or link to this item: https://open.uns.ac.rs/handle/123456789/12147
Title: Influence of different functionalization methods of multi-walled carbon nanotubes on the properties of poly(L-lactide) based nanocomposites
Authors: Vukić (Skerlić), Nevena 
Ristić, Ivan 
Marinović-Cincović, Milena
Radičević, Radmila
Pilić, Branka 
Cakić, Suzana
Budinski-Simendić, Jaroslava 
Issue Date: 2019
Publisher: Belgrade: Association of the Chemical Engineers of Serbia
Journal: Hemijska Industrija
Abstract: © 2019, Association of Chemists and Chemical Engineers of Serbia. All rights reserved. This paper presents influence of the type of carbon nanotube functionalization on properties of poly(L-lactide) (PLLA) based nanocomposite materials. For this purpose surface modifications of multi-walled carbon nanotubes (MWCNTs) were performed by chemical and irradiation techniques, while thermo gravimetric analysis, UV-Visible and Fourier-transform infrared (FT-IR) spectroscopies confirmed successful covalent functionalization. Series of PLLA bionanocom-posites with different contents of functionalized MWCNTs (0.7; 1.6; 2.1 wt%), were synthesized via ring-opening solution polymerisation of L-lactide. FT-IR analysis confirmed that grafting of L-lactide, under controlled condition, is possible to perform starting from the surface of functionalized MWCNTs. From differential scanning calorimetry results it was concluded that even low contents of chemically and irradiation functionalized MWCNTs had a significant effect on thermal properties of the prepared nanocomposites, raising the values of melting and glass transition temperatures. Thermogravimetric analysis (TGA) has shown that the degradation onset temperature for composites with chemically functionalized MWCNTs, was much higher than that for the neat poly(L-lactide) sample and composites with irradiation functionalized MWCNTs. Morphology studies by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) indicated that poly(L-lactide) covered surfaces and separated functionalized MWCNTs. Good dispersion of carbon nanotubes in polymer matrix enabled conductivity of synthesized materials, as determined by conductivity tests.
URI: https://open.uns.ac.rs/handle/123456789/12147
ISSN: 0367598X
DOI: 10.2298/HEMIND190402016V
Appears in Collections:TF Publikacije/Publications

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