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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.


(A) Typical TEM and (B) HRTEM images of PPy/MWCNT composites (the mass ratio of PPy/MWCNT is 2:8).
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Figure 2: (A) Typical TEM and (B) HRTEM images of PPy/MWCNT composites (the mass ratio of PPy/MWCNT is 2:8).

Mentions: TEM image of PPy/MWCNT (2:8) composites is shown in Figure 2A. The image reveals a coaxial structure of the resulted PPy/MWCNT composites in which the MWCNT is encapsulated by a uniform shell of PPy. Figure 2B shows an high-resolution TEM image of a segment of MWCNT coated with the ultrathin polymer shell. The original MWCNT core with a crystalline lattice structure and an amorphous PPy coating layer can be clearly identified. The MWCNT has an interlayer spacing of 0.34 nm, which corresponds to the interplanar distance of (002) planes of graphite. Importantly, the thickness of the PPy is about 6 nm, which reveals the close interfacial contact between the PPy layer and MWCNTs[25,26].


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)

(A) Typical TEM and (B) HRTEM images of PPy/MWCNT composites (the mass ratio of PPy/MWCNT is 2:8).
© Copyright Policy - open-access
Related In: Results  -  Collection

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

Figure 2: (A) Typical TEM and (B) HRTEM images of PPy/MWCNT composites (the mass ratio of PPy/MWCNT is 2:8).
Mentions: TEM image of PPy/MWCNT (2:8) composites is shown in Figure 2A. The image reveals a coaxial structure of the resulted PPy/MWCNT composites in which the MWCNT is encapsulated by a uniform shell of PPy. Figure 2B shows an high-resolution TEM image of a segment of MWCNT coated with the ultrathin polymer shell. The original MWCNT core with a crystalline lattice structure and an amorphous PPy coating layer can be clearly identified. The MWCNT has an interlayer spacing of 0.34 nm, which corresponds to the interplanar distance of (002) planes of graphite. Importantly, the thickness of the PPy is about 6 nm, which reveals the close interfacial contact between the PPy layer and MWCNTs[25,26].

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.