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A facile synthesis of polypyrrole/carbon nanotube composites with ultrathin, uniform and thickness-tunable polypyrrole shells.

Zhang B, Xu Y, Zheng Y, Dai L, Zhang M, Yang J, Chen Y, Chen X, Zhou J - Nanoscale Res Lett (2011)

Bottom Line: An improved approach to assemble ultrathin and thickness-tunable polypyrrole (PPy) films onto multiwall carbon nanotubes (MWCNTs) has been investigated.The coated PPy films can be easily tuned by adding ethanol and adjusting a mass ratio of pyrrole to MWCNTs.Moreover, the thickness of PPy significantly influences the electronic conductivity and capacitive behavior of the PPy/MWCNT composites.

View Article: PubMed Central - HTML - PubMed

Affiliation: Key Lab Polymer Composite & Funct Mat, Key Lab Designed Synth & Applicat Polymer Mat, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou, 510275, China. lzdai@xmu.edu.cn.

ABSTRACT
An improved approach to assemble ultrathin and thickness-tunable polypyrrole (PPy) films onto multiwall carbon nanotubes (MWCNTs) has been investigated. A facile procedure is demonstrated for controlling the morphology and thickness of PPy film by adding ethanol in the reaction system and a possible mechanism of the coating formation process is proposed. The coated PPy films can be easily tuned by adding ethanol and adjusting a mass ratio of pyrrole to MWCNTs. Moreover, the thickness of PPy significantly influences the electronic conductivity and capacitive behavior of the PPy/MWCNT composites. The method may provide a facile strategy for tailoring the polymer coating on carbon nanotubes (CNTs) for carbon-based device applications.

No MeSH data available.


HRTEM images of PPy/MWCNT composites with different mass ratios of PPy/MWCNT: (A) 2:8; (B) 4:6; (C) 5:5; (D) 6:4.
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Figure 5: HRTEM images of PPy/MWCNT composites with different mass ratios of PPy/MWCNT: (A) 2:8; (B) 4:6; (C) 5:5; (D) 6:4.

Mentions: Figure 5 presents the TEM images of four PPy/MWCNT samples prepared with various mass ratios of PPy monomer to MWCNT. In Figure. 5A, it is observed that PPy/MWCNT-1, synthesized at a PPy/MWCNT ratio of 2:8, is composed of ultrathin PPy shell coating on the surface of MWCNT core. The MWCNT diameter and PPy thickness are estimated to be around 31.7 nm and 6 nm, respectively. When the ratios of PPy/MWCNT were changed to 4:6 and 5:5, the shell thickness of these two PPy/MWCNT composites are estimated to be around 15.2 nm and 21 nm, respectively (Figures. 5B and 5C). As the ratio of PPy/MWCNT is raised to 6:4, the thickness of PPy shell reaches around 28 nm. Moreover, the surfaces of the four composites are all smooth, uniform and free of any granular product [35,36]. It is interesting to note that the thickness of the polymer is not increased remarkably as reported in the previous literature [21] when the mass ratio of the PPy/MWCNT is changed. The reason may be related to the fact that the polymerization rate of PPy is reduced obviously by adding ethanol in the reaction solution as mentioned above. Importantly, by using the facile synthesis approach, the thickness of PPy shell can be controlled by tuning the mass ratio of PPy monomer to MWCNT accurately, which may provide the favorable choice for the practical synthesis application of conjugated polymer/MWCNT composites.


A facile synthesis of polypyrrole/carbon nanotube composites with ultrathin, uniform and thickness-tunable polypyrrole shells.

Zhang B, Xu Y, Zheng Y, Dai L, Zhang M, Yang J, Chen Y, Chen X, Zhou J - Nanoscale Res Lett (2011)

HRTEM images of PPy/MWCNT composites with different mass ratios of PPy/MWCNT: (A) 2:8; (B) 4:6; (C) 5:5; (D) 6:4.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211849&req=5

Figure 5: HRTEM images of PPy/MWCNT composites with different mass ratios of PPy/MWCNT: (A) 2:8; (B) 4:6; (C) 5:5; (D) 6:4.
Mentions: Figure 5 presents the TEM images of four PPy/MWCNT samples prepared with various mass ratios of PPy monomer to MWCNT. In Figure. 5A, it is observed that PPy/MWCNT-1, synthesized at a PPy/MWCNT ratio of 2:8, is composed of ultrathin PPy shell coating on the surface of MWCNT core. The MWCNT diameter and PPy thickness are estimated to be around 31.7 nm and 6 nm, respectively. When the ratios of PPy/MWCNT were changed to 4:6 and 5:5, the shell thickness of these two PPy/MWCNT composites are estimated to be around 15.2 nm and 21 nm, respectively (Figures. 5B and 5C). As the ratio of PPy/MWCNT is raised to 6:4, the thickness of PPy shell reaches around 28 nm. Moreover, the surfaces of the four composites are all smooth, uniform and free of any granular product [35,36]. It is interesting to note that the thickness of the polymer is not increased remarkably as reported in the previous literature [21] when the mass ratio of the PPy/MWCNT is changed. The reason may be related to the fact that the polymerization rate of PPy is reduced obviously by adding ethanol in the reaction solution as mentioned above. Importantly, by using the facile synthesis approach, the thickness of PPy shell can be controlled by tuning the mass ratio of PPy monomer to MWCNT accurately, which may provide the favorable choice for the practical synthesis application of conjugated polymer/MWCNT composites.

Bottom Line: An improved approach to assemble ultrathin and thickness-tunable polypyrrole (PPy) films onto multiwall carbon nanotubes (MWCNTs) has been investigated.The coated PPy films can be easily tuned by adding ethanol and adjusting a mass ratio of pyrrole to MWCNTs.Moreover, the thickness of PPy significantly influences the electronic conductivity and capacitive behavior of the PPy/MWCNT composites.

View Article: PubMed Central - HTML - PubMed

Affiliation: Key Lab Polymer Composite & Funct Mat, Key Lab Designed Synth & Applicat Polymer Mat, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou, 510275, China. lzdai@xmu.edu.cn.

ABSTRACT
An improved approach to assemble ultrathin and thickness-tunable polypyrrole (PPy) films onto multiwall carbon nanotubes (MWCNTs) has been investigated. A facile procedure is demonstrated for controlling the morphology and thickness of PPy film by adding ethanol in the reaction system and a possible mechanism of the coating formation process is proposed. The coated PPy films can be easily tuned by adding ethanol and adjusting a mass ratio of pyrrole to MWCNTs. Moreover, the thickness of PPy significantly influences the electronic conductivity and capacitive behavior of the PPy/MWCNT composites. The method may provide a facile strategy for tailoring the polymer coating on carbon nanotubes (CNTs) for carbon-based device applications.

No MeSH data available.