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

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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.


Scheme A shows excess P3HT being added to F8BT/SWCNT. Three days after the addition of excess polymer, any unbound polymer is removed to give P3HT/SWCNT. In Scheme B, the addition of F8BT in P3HT/SWCNT gave P3HT/SWCNT. Reproduced with permission from S D Stranks et al 2013 Adv. Mater.25 4365. Copyright 2013 John Wiley and Sons.
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Figure 18: Scheme A shows excess P3HT being added to F8BT/SWCNT. Three days after the addition of excess polymer, any unbound polymer is removed to give P3HT/SWCNT. In Scheme B, the addition of F8BT in P3HT/SWCNT gave P3HT/SWCNT. Reproduced with permission from S D Stranks et al 2013 Adv. Mater.25 4365. Copyright 2013 John Wiley and Sons.

Mentions: It is important to note that the degree of the stability depends on the polymer structure; thereby, in some cases, exchange of the wrapped polymer with the other polymer dispersant is possible. Sprafke et al demonstrated the correlation between the length of the porphyrin oligomers and the binding strength and found that the longer oligomers are able to replace the shorter ones and that the replacement was attributed to an increasing binding affinity with the oligomer length [219]. Chen et al demonstrated competitive binding between PFO and PFO-BT and found that the SWCNTs were preferentially functionalized by PFO-BT [220]. In 2013, Stranks et al found that PFO-BT was replaced by P3HT in the solution (figure 18) [58]. This fact also suggests that the polymer wrapping can be realized also by the exchange of the surfactant-dispersed CNTs. Indeed, Jeng et al reported the wrapping of DNA by adding DNA to the solution of SC dispersed SWCNTs [56]. Such an exchanging procedure is advantageous to avoid damage of the polymers by the dispersion process, such as sonication.


Non-covalent polymer wrapping of carbon nanotubes and the role of wrapped polymers as functional dispersants
Scheme A shows excess P3HT being added to F8BT/SWCNT. Three days after the addition of excess polymer, any unbound polymer is removed to give P3HT/SWCNT. In Scheme B, the addition of F8BT in P3HT/SWCNT gave P3HT/SWCNT. Reproduced with permission from S D Stranks et al 2013 Adv. Mater.25 4365. Copyright 2013 John Wiley and Sons.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

Figure 18: Scheme A shows excess P3HT being added to F8BT/SWCNT. Three days after the addition of excess polymer, any unbound polymer is removed to give P3HT/SWCNT. In Scheme B, the addition of F8BT in P3HT/SWCNT gave P3HT/SWCNT. Reproduced with permission from S D Stranks et al 2013 Adv. Mater.25 4365. Copyright 2013 John Wiley and Sons.
Mentions: It is important to note that the degree of the stability depends on the polymer structure; thereby, in some cases, exchange of the wrapped polymer with the other polymer dispersant is possible. Sprafke et al demonstrated the correlation between the length of the porphyrin oligomers and the binding strength and found that the longer oligomers are able to replace the shorter ones and that the replacement was attributed to an increasing binding affinity with the oligomer length [219]. Chen et al demonstrated competitive binding between PFO and PFO-BT and found that the SWCNTs were preferentially functionalized by PFO-BT [220]. In 2013, Stranks et al found that PFO-BT was replaced by P3HT in the solution (figure 18) [58]. This fact also suggests that the polymer wrapping can be realized also by the exchange of the surfactant-dispersed CNTs. Indeed, Jeng et al reported the wrapping of DNA by adding DNA to the solution of SC dispersed SWCNTs [56]. Such an exchanging procedure is advantageous to avoid damage of the polymers by the dispersion process, such as sonication.

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.