Multi-functional hindered amine light stabilizers-functionalized carbon nanotubes for advanced ultra-high molecular weight Polyethylene-based nanocomposites

TitleMulti-functional hindered amine light stabilizers-functionalized carbon nanotubes for advanced ultra-high molecular weight Polyethylene-based nanocomposites
Publication TypeJournal Article
Year of Publication2015
AuthorsDintcheva, NT, Arrigo, R, Morici, E, Gambarotti, C, Carroccio, S, Cicogna, F, Filippone, G
JournalComposites Part B: Engineering
Volume82
Start Page196
Pagination196 - 204
Date Published2015
ISSN13598368
KeywordsA. Nano-structures, A. Polymer-matrix composites (PMCs), B. Mechanical properties, B. Rheological properties, carbon, Carbon films, Coloring, Composite films, fillers, Functionalized carbon nanotubes, Grafting (chemical), Grafting reactions, High performance polymer composite, Hindered amine light stabilizer, Mechanical properties, molecular weight, Molecules, Morphological analysis, Multiwalled carbon nanotubes (MWCN), Nanocomposite films, Nanostructures, Nonmetallic matrix composites, Photo-oxidative resistance, Polyethylenes, Polymer matrix composites, Polymer Matrix Composites (PMCs), Rheological property, Synergic effects, Thermogravimetric analysis, Ultrahigh molecular weight polyethylenes, Yarn
Abstract

Hindered Amine Light Stabilizer (HAS) molecules have been covalently linked on the outer surface of multi-walled carbon nanotubes (CNTs), and the so-obtained multi-functional fillers (HAS-f-CNTs) have been compounded with Ultra High Molecular Weight Polyethylene (UHMWPE) to get composite films. The success of the grafting reaction of the HAS molecules has been confirmed through spectroscopic and thermo-gravimetric analyses. Morphological analyses reveal a segregated microstructure, in which CNT-rich channels surround the polymer domains. This morphology results in improved mechanical properties and appreciable electrical conductive features. More importantly, the addition of only 1 wt.% of HAS-f-CNTs brings about a significant improvement of the photo-oxidation resistance, which neither HAS nor CNTs can provide if used separately. The origin of this synergic effect is discussed. Overall, our results demonstrate the possibility of using properly functionalized CNTs as multi-functional fillers to get high-performance polymer composites. © 2015 Elsevier Ltd. All rights reserved.

DOIdoi:10.1016/j.compositesb.2015.07.017
Short TitleCompos Part B: Eng