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Synthesis, Characterization, and Modeling of Nanotube Materials with Variable Stiffness Tethers

Published online by Cambridge University Press:  01 February 2011

S. J. V. Frankland ,
M. N. Herzog ,
G. M. Odegard ,
T. S. Gates  and
C. C. Fay
S. J. V. Frankland
Affiliation:
National Institute of Aerospace, Hampton, VA
M. N. Herzog
Affiliation:
National Research Council, Hampton, VA
G. M. Odegard
Affiliation:
National Institute of Aerospace, Hampton, VA
T. S. Gates
Affiliation:
NASA Langley Research Center, Hampton, VA
C. C. Fay
Affiliation:
NASA Langley Research Center, Hampton, VA
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Abstract

Synthesis, mechanical testing, and modeling have been performed for a carbon nanotube material in which the nanotubes are functionalized with variable stiffness tethers (VST) capable of cross-linking the nanotubes. Tests using nanoindentation indicated a six-fold enhancement in the storage modulus when comparing the base material (the cross-linking agent with no nanotubes) to the composite (functionalized nanotube material) that contained 5.3 wt% of nanotubes. To understand how crosslinking the nanotubes may further alter the stiffness, a model of the system was constructed using nanotubes crosslinked with the VST. The model predicted that for a composite with 5 wt% nanotubes at random orientations, crosslinked with the VST, the bulk Young's modulus was reduced to 30% that of the non-crosslinked equivalent.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 851: Symposium NN – Materials for Space Applications , 2004 , NN2.8
Copyright
Copyright © Materials Research Society 2005

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References

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