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Proceedings Paper

Mechanical properties of epoxy nanocomposites reinforced with very low content of amino-functionalized single-walled carbon nanotubes
Author(s): Yun Zhao; Haiping Hong; Jeffry S. Welsh
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Paper Abstract

Functionalized single-walled carbon nanotubes (SWNTs) with amino groups were prepared by oxidation, acylation, and amidation of SWNT surfaces. Epoxy/SWNT composite membranes were fabricated using a very low content of amino-grafted SWNTs (≤0.08wt%) as fillers. SWNTs with amino groups acted as a curing agent, covalently bonding to the epoxy matrix. The influence of SWNT content on the mechanical properties of epoxy/amino-functionalized SWNT composite membrane was investigated. It is found that the tensile strength of composites is enhanced with the increase of SWNTs. Only 0.01wt% of SWNT-R-NH2 leads to improvement of the epoxy tensile strength by 9.5%, and 0.08wt% of SWNT-R-NH2 increased tensile strength by 13.6%. For comparison purposes, epoxy/pristine-SWNT films were also prepared. The improvement of the tensile strength of the amino-functionalized SWNTs system is more remarkable than that of pristine SWNT system at very low weight-percentage loading. The amino groups on the surface of SWNTs can be covalently attached to the epoxy matrix, which effectively improves the dispersion and adhesion of SWNTs in epoxy. This leads to the enhancement in mechanical properties of the epoxy composite. Mechanical results between functionalized and pristine nanotubes are discussed in detail.

Paper Details

Date Published: 3 September 2009
PDF: 13 pages
Proc. SPIE 7404, Nanostructured Thin Films II, 74040H (3 September 2009); doi: 10.1117/12.826331
Show Author Affiliations
Yun Zhao, South Dakota School of Mines and Technology (United States)
Beijing Institute of Technology (China)
Haiping Hong, South Dakota School of Mines and Technology (United States)
Jeffry S. Welsh, Air Force Research Lab. (United States)


Published in SPIE Proceedings Vol. 7404:
Nanostructured Thin Films II
Geoffrey B. Smith; Akhlesh Lakhtakia; Cheng-Chung Lee, Editor(s)

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