http://www.cnr.it/ontology/cnr/individuo/prodotto/ID290888
alpha-Tocopherol-induced radical scavenging activity in carbon nanotubes for thermo-oxidation resistant ultra-high molecular weight polyethylene-based nanocomposites (Articolo in rivista)
- Type
- Label
- alpha-Tocopherol-induced radical scavenging activity in carbon nanotubes for thermo-oxidation resistant ultra-high molecular weight polyethylene-based nanocomposites (Articolo in rivista) (literal)
- Anno
- 2014-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1016/j.carbon.2014.02.074 (literal)
- Alternative label
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Dintcheva N.T.; Arrigo R.; Gambarotti C.; Carroccio S.; Filippone G.; Cicogna F.; Guenzi M. (literal)
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- Pagina fine
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- http://www.scopus.com/inward/record.url?eid=2-s2.0-84899484182&partnerID=q2rCbXpz (literal)
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- Rivista
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- Dipartimento di Ingegneria Civile, Ambientale, Aerospaziale, Dei Materiali, Università di Palermo, Viale delle Scienze, Ed. 6, 90128 Palermo, Italy; Dipartimento di Chimica, Materiali Ed Ingegneria Chimica G. Natta, Politecnico di Milano, Piazza L. da Vinci 32, 20133 Milan, Italy; Consiglio Nazionale Delle Ricerche - ICTP UOS Catania, Via P. Gaifami 18, 95126 Catania, Italy; Dipartimento di Ingegneria Chimica, Dei Materiali e della Produzione Industriale (INSTM Consortium - UdR Naples), Università di Napoli Federico II, Piazzale V. Tecchio 80, 80125 Napoli, Italy; Consiglio Nazionale Delle Ricerche CNR - ICCOM UOS Pisa, Area della Ricerca, Via G. Moruzzi 1, 56124 Pisa, Italy (literal)
- Titolo
- alpha-Tocopherol-induced radical scavenging activity in carbon nanotubes for thermo-oxidation resistant ultra-high molecular weight polyethylene-based nanocomposites (literal)
- Abstract
- ?-Tocopherol, a natural antioxidant molecule, was physically immobilized on the outer surface of multi-walled carbon nanotubes (CNTs), and the resulting functionalised particles (f-CNTs) were dispersed in ultra-high molecular weight polyethylene aiming at improving its thermo-oxidation resistance. The success of the functionalization was assessed through spectroscopic and thermal analysis, and the influence of the filler on the thermo-oxidative stability of the nanocomposites was investigated through rheological analyses and infrared spectroscopy. We found that the addition of only 1 wt.% of f-CNTs brings about a surprisingly high oxidation resistance, with a five/ten-fold increase of the induction time of the degradation phenomena. Rather than to the inherent stabilizing action of the ?-tocopherol, such a notable result is believed to be due to its specific chemical interactions with the CNTs, which could exhibit a considerable radical scavenging activity due to the formation of structural defects on their outer surface. The latter represent acceptor-like localized states, which radically improve the thermo-oxidative resistance of the f-CNTs-based polymer nanocomposites. © 2014 Elsevier Ltd. All rights reserved. (literal)
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