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EnglishThe work aim is focused on two different aspects:first, the investigation of the effect of extended ultra-sound-assisted treatment (us) of carbonaceous nanoparticles, such as carbon nanotubes (CNTs) and carbon black (CB),on their radical scavenging activity, andsecond, the investigation of the oxidative resistance of polymer-basednanocomposites, containing us-treated CNTs and CB. Particularly, the CNTs and CB have been subjected to ussonication for different time intervals and the performed analysis reveals that both kinds of nanoparticles showdecreased average hydrodynamic diameters and large content of surface defects. Really, the increased content ofCNTs and CB defects, achieved during the sonication time, leads to an increased reactivity toward 1,1-diphenyl-2-pycryl (DPPH) radicals and an enhanced anti-oxidant activity toward macro-radicals, coming from the photo-degradation of the host polymer matrix. The studies of photo-oxidative behavior of the nanocomposites, basedon Ultra High Molecular Weight (UHMWPE), reveal that the us treatment of the nanoparticles has a beneficeffect on the oxidative resistance of the nanocomposites, especially at long exposure times. Overall, the ultra-sound-assisted treatment can be considered twofold powerful tool: (i) for disruption of the nanoparticles ag-gregations, and (ii) for capitalization of surface defects, amplifying and tuning in a controlled way the radicalscavenging activity of the carbonaceous nanoparticles
| Data di pubblicazione: | 2020 |
| Titolo: | Improvement of oxidation resistance of polymer-based nanocomposites through sonication of carbonaceous nanoparticles |
| Autori: | DINTCHEVA, Nadka Tzankova (Corresponding) |
| Citazione: | Teresi, R., Marullo, S., Gambarotti, C., Parisi, F., Megna, B., Lazzara, G., et al. (2020). Improvement of oxidation resistance of polymer-based nanocomposites through sonication of carbonaceous nanoparticles. ULTRASONICS SONOCHEMISTRY, 61, 104807. |
| Rivista: | |
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1016/j.ultsonch.2019.104807 |
| Abstract: | The work aim is focused on two different aspects:first, the investigation of the effect of extended ultra-sound-assisted treatment (us) of carbonaceous nanoparticles, such as carbon nanotubes (CNTs) and carbon black (CB),on their radical scavenging activity, andsecond, the investigation of the oxidative resistance of polymer-basednanocomposites, containing us-treated CNTs and CB. Particularly, the CNTs and CB have been subjected to ussonication for different time intervals and the performed analysis reveals that both kinds of nanoparticles showdecreased average hydrodynamic diameters and large content of surface defects. Really, the increased content ofCNTs and CB defects, achieved during the sonication time, leads to an increased reactivity toward 1,1-diphenyl-2-pycryl (DPPH) radicals and an enhanced anti-oxidant activity toward macro-radicals, coming from the photo-degradation of the host polymer matrix. The studies of photo-oxidative behavior of the nanocomposites, basedon Ultra High Molecular Weight (UHMWPE), reveal that the us treatment of the nanoparticles has a beneficeffect on the oxidative resistance of the nanocomposites, especially at long exposure times. Overall, the ultra-sound-assisted treatment can be considered twofold powerful tool: (i) for disruption of the nanoparticles ag-gregations, and (ii) for capitalization of surface defects, amplifying and tuning in a controlled way the radicalscavenging activity of the carbonaceous nanoparticles |
| URL: | www.elsevier.com/inca/publications/store/5/2/5/4/5/1 |
| Settore Scientifico Disciplinare: | Settore CHIM/06 - Chimica Organica Settore CHIM/02 - Chimica Fisica Settore ING-IND/22 - Scienza E Tecnologia Dei Materiali |
| Appare nelle tipologie: | 1.01 Articolo in rivista |
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