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Multifunctional Nanoprepregs Based on Aligned Carbon Nanotube Sheets

Published online by Cambridge University Press:  22 February 2012

Xin Wang ,
Wei Liu ,
Qian Jiang ,
Mohammad S. Harb ,
Qingwen Li  and
Yuntian Zhu
Xin Wang
Affiliation:
North Carolina State University, Raleigh, NC 27695, U.S.A.
Wei Liu
Affiliation:
North Carolina State University, Raleigh, NC 27695, U.S.A. Donghua University, Shanghai, 201620, China
Qian Jiang
Affiliation:
North Carolina State University, Raleigh, NC 27695, U.S.A. Donghua University, Shanghai, 201620, China
Mohammad S. Harb
Affiliation:
North Carolina State University, Raleigh, NC 27695, U.S.A.
Qingwen Li
Affiliation:
Suzhou Institute of Nano-Tech and Nano-Bionics, Suzhou 215125, China
Yuntian Zhu
Affiliation:
North Carolina State University, Raleigh, NC 27695, U.S.A.
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Abstract

The unique properties of carbon nanotubes (CNTs), such as high strength and stiffness, extremely large specific surface area, low density and high electrical and thermal conductivities, open up opportunities for a wide range of applications. This has led to widespread research on the synthesis of multiscale CNT-based polymeric composites transferring the properties from nanoscale to macroscale. Currently known conventional methods for producing CNT composites rely on dispersing short nanotubes in polymer matrices or infiltrating CNT “buckypaper” with resins. Unlike conventional methods, in this work, super-aligned long CNTs were directly drawn from the vertically aligned CNT arrays and assembled into high volume fraction (~60 vol%) composites. These critical structural features allowed the CNT composites to reach tensile strengths over 1.8 GPa and electrical conductivity ~700-800 S/cm. Thermoplastic and thermosetting polymers were utilized for the fabrication and the results were compared. Our observation suggests that the strengthening and conducting mechanism is derived from the synergistic effect of high degree of CNT alignment, long CNT length, high volume fraction and uniform distribution of CNTs in the polymer matrix produced by spray-winding.

Keywords

nanostructurecompositestrength
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1407: Symposium AA – Carbon Nanotubes, Graphene and Related Nanostructures , 2012 , mrsf11-1407-aa13-03
Copyright
Copyright © Materials Research Society 2012

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