• Aiuto
  • Sfoglia

    • Dispersions of functionalized carbon nanotubes (fx-CNTs) have been analyzed by means of Low Field Nuclear Magnetic Resonance measurements (LF-NMR). This technique showed that the presence of the fx-CNTs strongly influences the structuring of the water molecules. Thereupon, the water transversal relaxation rate (r2) can be used to get information about the concentration of the CNTs in aqueous dispersion and their aggregation tendency. Finally, the effect of the addition of an anionic polyelectrolyte, namely alginate, on aqueous dispersion of CNTs was explored by using LF-NMR, which revealed different dependence of r2 from CNT concentration, depending on the type and charge of fx-CNTs.



    Titolo: Evaluation of concentration and dispersion of functionalized carbon nanotubes in aqueous media by means of Low Field Nuclear Magnetic Resonance
    Autori: 
    PORRELLI, DAVIDE
    COK, MICHELA
    ABRAMI, MICHELA
    BOSI, Susanna
    PRATO, MAURIZIO
    GRASSI, Mario
    PAOLETTI, SERGIO
    DONATI, IVAN
    Data di pubblicazione: 2017
    Rivista: 
    CARBON  
    Abstract: Dispersions of functionalized carbon nanotubes (fx-CNTs) have been analyzed by means of Low Field Nuclear Magnetic Resonance measurements (LF-NMR). This technique showed that the presence of the fx-CNTs strongly influences the structuring of the water molecules. Thereupon, the water transversal relaxation rate (r2) can be used to get information about the concentration of the CNTs in aqueous dispersion and their aggregation tendency. Finally, the effect of the addition of an anionic polyelectrolyte, namely alginate, on aqueous dispersion of CNTs was explored by using LF-NMR, which revealed different dependence of r2 from CNT concentration, depending on the type and charge of fx-CNTs.
    Handle: http://hdl.handle.net/11368/2891733
    Digital Object Identifier (DOI): 10.1016/j.carbon.2016.11.025
    URL: http://www.sciencedirect.com/science/article/pii/S000862231630999X
    Appare nelle tipologie:1.1 Articolo in Rivista

    File in questo prodotto:
    File Descrizione Tipologia Licenza  
    Porrelli et al 2017 Carbon.pdf Publisher-VersionDigital Rights Management non definitoAdministrator   Richiedi una copia
    Utilizza questo identificativo per citare o creare un link a questo documento:
    http://hdl.handle.net/11368/2891733
    • Citazioni
    • ND

    I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
     
     
     
    ©2014 University of Trieste dove siamo Privacy
    Piazzale Europa,1 34127 Trieste, Italia - Tel. +39 040.558.7111 - P.IVA 00211830328 - C.F. 80013890324 - P.E.C.: ateneo@pec.units.it
     Copyright © 2019