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3 September 2009Mechanical properties of epoxy nanocomposites reinforced with very low content of amino-functionalized single-walled carbon nanotubes
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.
Yun Zhao,Haiping Hong, andJeffry S. Welsh
"Mechanical properties of epoxy nanocomposites reinforced with very low content of amino-functionalized single-walled carbon nanotubes", Proc. SPIE 7404, Nanostructured Thin Films II, 74040H (3 September 2009); https://doi.org/10.1117/12.826331
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Yun Zhao, Haiping Hong, Jeffry S. Welsh, "Mechanical properties of epoxy nanocomposites reinforced with very low content of amino-functionalized single-walled carbon nanotubes," Proc. SPIE 7404, Nanostructured Thin Films II, 74040H (3 September 2009); https://doi.org/10.1117/12.826331