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

Handle URI:
http://hdl.handle.net/10754/555637
Title:
Surface Modification of Multiwall Carbon Nanotubes with Cationic Conjugated Polyelectrolytes: Fundamental Interactions and Intercalation into Conductive Poly(methyl-methacrylate) Composites
Authors:
Ezzeddine, Alaa; Chen, Zhuo ( 0000-0002-8433-8695 ) ; Schanze, Kirk S.; Khashab, Niveen M. ( 0000-0003-2728-0666 )
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.
KAUST Department:
Smart Hybrid Materials (SHMs) lab; Advanced Membranes and Porous Materials Research Center
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
Issue Date:
22-May-2015
DOI:
10.1021/acsami.5b02540
Type:
Article
ISSN:
1944-8244; 1944-8252
Additional Links:
http://pubs.acs.org/doi/abs/10.1021/acsami.5b02540
Appears in Collections:
Articles; Advanced Membranes and Porous Materials Research Center; Controlled Release and Delivery Laboratory

Full metadata record

DC FieldValue Language
dc.contributor.authorEzzeddine, Alaaen
dc.contributor.authorChen, Zhuoen
dc.contributor.authorSchanze, Kirk S.en
dc.contributor.authorKhashab, Niveen M.en
dc.date.accessioned2015-05-25T08:12:43Zen
dc.date.available2015-05-25T08:12:43Zen
dc.date.issued2015-05-22en
dc.identifier.citationSurface Modification of Multiwall Carbon Nanotubes with Cationic Conjugated Polyelectrolytes: Fundamental Interactions and Intercalation into Conductive Poly(methyl-methacrylate) Composites 2015:150522162230006 ACS Applied Materials & Interfacesen
dc.identifier.issn1944-8244en
dc.identifier.issn1944-8252en
dc.identifier.doi10.1021/acsami.5b02540en
dc.identifier.urihttp://hdl.handle.net/10754/555637en
dc.description.abstractThis 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.en
dc.publisherAmerican Chemical Society (ACS)en
dc.relation.urlhttp://pubs.acs.org/doi/abs/10.1021/acsami.5b02540en
dc.rightsThis document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Materials & Interfaces, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://pubs.acs.org/doi/abs/10.1021/acsami.5b02540.en
dc.subjectmultiwall carbon nanotubes (MWCNTs)en
dc.subjectconj ugated polyelectrolytes (CPEs)en
dc.subjectpoly(methyl methacrylate) (PMMA)en
dc.subjectdispersionen
dc.subjectelect rical conductivityen
dc.subjectcompositesen
dc.titleSurface Modification of Multiwall Carbon Nanotubes with Cationic Conjugated Polyelectrolytes: Fundamental Interactions and Intercalation into Conductive Poly(methyl-methacrylate) Compositesen
dc.typeArticleen
dc.contributor.departmentSmart Hybrid Materials (SHMs) laben
dc.contributor.departmentAdvanced Membranes and Porous Materials Research Centeren
dc.identifier.journalACS Applied Materials & Interfacesen
dc.eprint.versionPost-printen
dc.contributor.institutionDepartment of Chemistry and Center for Macromolec ular Science and Engineering, University of Florida, P.O. Box 117200, Gainesville, Florida 3 2611!7200, United Statesen
kaust.authorKhashab, Niveen M.en
kaust.authorEzzeddine, Alaaen
kaust.authorChen, Zhuoen
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