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Preparation and Characterization of NPC/SWNT Nanocomposite

Published online by Cambridge University Press:  01 February 2011

Bo Yi ,
Ramakrishnan Rajagopalan  and
Henry C Foley
Bo Yi
Affiliation:
[email protected], The Pennsylvania State University, Chemical Engineering, 166 Fenske Lab, University Park, PA, 16802, United States, 814-865-9735
Ramakrishnan Rajagopalan
Affiliation:
[email protected], The Pennsylvania State University, Material Research Institute, 133 Fenske Lab, University Park, PA, 16802, United States
Henry C Foley
Affiliation:
[email protected], The Pennsylvania State University, Chemical Engineering, 332 Information Sciences and Technology Building, University Park, PA, 16802, United States
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Abstract

A nanocomposite carbon composed with single wall carbon nanotube (SWNT) and nanoporous carbon (NPC) was prepared by grafting a carbonizable polymer, poly(furfuryl alcohol) (PFA) to a SWNT. The SWNT was first functionalized with arylsulfonic acid groups on sidewall (SA-SWNT) and then converted to PFA-functionalized SWNT (PFA-SWNT) by in situ polymerization of furfuryl alcohol (FA). SWNT/NPC nanocomposite carbon was generated by heating PFA-SWNT in argon at 600°C. A continuous phase was formed between SWNT and NPC. The deformation of the nanocomposite carbon at high temperature was studied by heating it at temperatures from 1200 to 2000 °C and characterized with HRTEM and Raman spectra. It was found that NPC tended to graphitize along the axis of neighboring nanotubes at temperature higher than 1400°C. Complete graphitization of NPC and SWNTs was obtained at 2000 °C, when the NPC transformed to graphitic nanoribbon (GNR) and SWNT or DWNT collapsed within the confines of the GNR. Nanocomposite polymer and carbon fibers were prepared by dispersing small amount of SA-SWNT in FA, followed with polymerization, thermosetting and pyrolysis. The composite polymer fibers' Young's modulus was lower than the pure PFA fibers prepared at the same conditions. However, after heated in argon at 300 °C, 400 °C, 500 °C and 600 °C respectively, the Young's modulus of the nanocomposite carbon fibers turned to be higher than the fibers derived from pure PFA and the enhancement by SWNT increase with increasing temperature. For the nanocomposite carbon fibers treated at 600 °C, the fibers had ∼20% increase of Young's modulus over the fibers from pure PFA with only 0.1wt% of SA-SWNT in FA.

Keywords

Ccompositefiber
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 963: Symposium Q – Nanowires and Carbon Nanotubes – Science and Applications , 2006 , 0963-Q20-12
Copyright
Copyright © Materials Research Society 2007

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References

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