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    Surface Modification of Multiwall Carbon Nanotubes with Cationic Conjugated Polyelectrolytes: Fundamental Interactions and Intercalation into Conductive Poly(methyl-methacrylate) Composites

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    acsami%2E5b02540.pdf
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    Description:
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    Type
    Article
    Authors
    Ezzeddine, Alaa cc
    Chen, Zhuo cc
    Schanze, Kirk S.
    Khashab, Niveen M. cc
    KAUST Department
    Advanced Membranes and Porous Materials Research Center
    Chemical Science Program
    Physical Science and Engineering (PSE) Division
    Smart Hybrid Materials (SHMs) lab
    Date
    2015-06-08
    Online Publication Date
    2015-06-08
    Print Publication Date
    2015-06-17
    Permanent link to this record
    http://hdl.handle.net/10754/555637
    
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    Abstract
    This research investigates the modification and dispersion and of pristine multiwalled carbon nanotubes (MWCNTs) through a simple solution mixing technique based on noncovalent interactions between poly(phenylene ethynylene) based conjugated polyelectrolytes functionalized with cationic imidazolium solubilizing groups (PIM-2 and PIM-4) and MWCNTs. Spectroscopic studies demonstrated the ability of PIMs to strongly interact with and efficiently disperse MWCNTs in different solvents mainly due to π-interactions between the PIMs and MWCNTs. Transmission electron microscopy and atomic force microscopy revealed the coating of the polyelectrolytes on the walls of the nanotubes. Scanning electron microscopy (SEM) studies confirm the homogenous dispersion of PIM modified MWCNTs in poly(methyl methacrylate) (PMMA) matrix. The addition of 1 wt% PIM modified MWCNTs to the matrix has led to a significant decrease in DC resistivity of the composite (13 orders of magnitude). The increase in electrical conductivity and the improvement in thermal and mechanical properties of the membranes containing the PIM modified MWCNTs is ascribed to the formation of MWCNTs networks and cross-linking sites that provided channels for the electrons to move in throughout the matrix and reinforced the interface between MWCNTs and PMMA.
    Citation
    Surface Modification of Multiwall Carbon Nanotubes with Cationic Conjugated Polyelectrolytes: Fundamental Interactions and Intercalation into Conductive Poly(methyl-methacrylate) Composites 2015:150522162230006 ACS Applied Materials & Interfaces
    Publisher
    American Chemical Society (ACS)
    Journal
    ACS Applied Materials & Interfaces
    DOI
    10.1021/acsami.5b02540
    PubMed ID
    26001041
    Additional Links
    http://pubs.acs.org/doi/abs/10.1021/acsami.5b02540
    ae974a485f413a2113503eed53cd6c53
    10.1021/acsami.5b02540
    Scopus Count
    Collections
    Articles; Advanced Membranes and Porous Materials Research Center; Physical Science and Engineering (PSE) Division; Controlled Release and Delivery Laboratory; Chemical Science Program

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