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Non-covalent polymer wrapping of carbon nanotubes and the role of wrapped polymers as functional dispersants

View Article: PubMed Central - PubMed

ABSTRACT

Carbon nanotubes (CNTs) have been recognized as a promising material in a wide range of applications from biotechnology to energy-related devices. However, the poor solubility in aqueous and organic solvents hindered the applications of CNTs. As studies have progressed, the methodology for CNT dispersion was established. In this methodology, the key issue is to covalently or non-covalently functionalize the surfaces of the CNTs with a dispersant. Among the various types of dispersions, polymer wrapping through non-covalent interactions is attractive in terms of the stability and homogeneity of the functionalization. Recently, by taking advantage of their stability, the wrapped-polymers have been utilized to support and/or reinforce the unique functionality of the CNTs, leading to the development of high-performance devices. In this review, various polymer wrapping approaches, together with the applications of the polymer-wrapped CNTs, are summarized.

No MeSH data available.


Chromatogram of the series of aromatic compounds analyzed using CNT as the stationary phase. Chromatograms of (black) benzene, (red) naphthalene, (light blue) biphenyl, (green) fluorene, (brown) phenanthrene, (pink) anthracene, (purple) pyrene, (light green) triphenylene, (orange) p-terphenyl and (yellow) tetraphene obtained from the SWCNT-column; eluent: tetrahydrofuran, flow rate 0.1 mL min−1 (left) and 0.5 mL min−1 (right).
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Figure 12: Chromatogram of the series of aromatic compounds analyzed using CNT as the stationary phase. Chromatograms of (black) benzene, (red) naphthalene, (light blue) biphenyl, (green) fluorene, (brown) phenanthrene, (pink) anthracene, (purple) pyrene, (light green) triphenylene, (orange) p-terphenyl and (yellow) tetraphene obtained from the SWCNT-column; eluent: tetrahydrofuran, flow rate 0.1 mL min−1 (left) and 0.5 mL min−1 (right).

Mentions: Aromatic condensation polymers having an aromatic system in the main-chain, such as polyimides (PIs), are the polymers that can wrap the CNTs [116]. Our chromatography studies using CNTs as the stationary phase revealed that the one-dimensional aromatic compounds, such as tetraphene, exhibited a stronger affinity with the CNT surfaces than the other analogs with the same number of the aromatic rings, such as pyrene or triphenylene, due to the effective overwrapping with the one-dimensional CNT surfaces (figure 12) [117, 118].


Non-covalent polymer wrapping of carbon nanotubes and the role of wrapped polymers as functional dispersants
Chromatogram of the series of aromatic compounds analyzed using CNT as the stationary phase. Chromatograms of (black) benzene, (red) naphthalene, (light blue) biphenyl, (green) fluorene, (brown) phenanthrene, (pink) anthracene, (purple) pyrene, (light green) triphenylene, (orange) p-terphenyl and (yellow) tetraphene obtained from the SWCNT-column; eluent: tetrahydrofuran, flow rate 0.1 mL min−1 (left) and 0.5 mL min−1 (right).
© Copyright Policy - open-access
Related In: Results  -  Collection

License 1 - License 2
Show All Figures
getmorefigures.php?uid=PMC5036478&req=5

Figure 12: Chromatogram of the series of aromatic compounds analyzed using CNT as the stationary phase. Chromatograms of (black) benzene, (red) naphthalene, (light blue) biphenyl, (green) fluorene, (brown) phenanthrene, (pink) anthracene, (purple) pyrene, (light green) triphenylene, (orange) p-terphenyl and (yellow) tetraphene obtained from the SWCNT-column; eluent: tetrahydrofuran, flow rate 0.1 mL min−1 (left) and 0.5 mL min−1 (right).
Mentions: Aromatic condensation polymers having an aromatic system in the main-chain, such as polyimides (PIs), are the polymers that can wrap the CNTs [116]. Our chromatography studies using CNTs as the stationary phase revealed that the one-dimensional aromatic compounds, such as tetraphene, exhibited a stronger affinity with the CNT surfaces than the other analogs with the same number of the aromatic rings, such as pyrene or triphenylene, due to the effective overwrapping with the one-dimensional CNT surfaces (figure 12) [117, 118].

View Article: PubMed Central - PubMed

ABSTRACT

Carbon nanotubes (CNTs) have been recognized as a promising material in a wide range of applications from biotechnology to energy-related devices. However, the poor solubility in aqueous and organic solvents hindered the applications of CNTs. As studies have progressed, the methodology for CNT dispersion was established. In this methodology, the key issue is to covalently or non-covalently functionalize the surfaces of the CNTs with a dispersant. Among the various types of dispersions, polymer wrapping through non-covalent interactions is attractive in terms of the stability and homogeneity of the functionalization. Recently, by taking advantage of their stability, the wrapped-polymers have been utilized to support and/or reinforce the unique functionality of the CNTs, leading to the development of high-performance devices. In this review, various polymer wrapping approaches, together with the applications of the polymer-wrapped CNTs, are summarized.

No MeSH data available.