Single-walled carbon nanotube–epoxy composites for structural and conductive aerospace adhesives

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DOIResolve DOI: http://doi.org/10.1016/j.compositesb.2014.09.022
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TypeArticle
Journal titleComposites Part B: Engineering
ISSN1359-8368
Volume69
Pages8793; # of pages: 7
SubjectNano-structures; Polymer–matrix composites; Electrical properties; Joints/joining; Conductive adhesives
AbstractSingle-walled carbon nanotubes (SWCNTs) were incorporated at low loading (up to ∼1 wt%) into an unfilled aerospace-grade epoxy system, to impart electrical conductivity while maintaining structural bonding capability, as a route for development of a structural and conductive adhesive. At these low SWCNT loadings the tensile properties were maintained or improved, while strength decreased in a higher loading case. The structural bonding performance of composite-to-composite joints, evaluated in lap-shear and peel tests, was reasonably maintained for adhesives containing 0.5 wt% or 1 wt% SWCNTs. In the case of the 0.5 wt% SWCNT–adhesive, peel and lap-shear strength were unchanged while the addition of 1 wt% resulted in 30% increase of peel strength but the lap-shear strength was reduced by 10–15%. For 1 wt% SWCNT–adhesives, conductivities as high as 10−1 S m−1 and typically ∼10−3 S m−1 were achieved. Joint electrical resistance measured between aluminum adherends was larger than predicted by the bulk conductivity, but was reduced by a post-treatment step resulting in apparent joint conductivities within one order of magnitude of the bulk samples.
Publication date
LanguageEnglish
AffiliationSecurity and Disruptive Technologies; Aerospace; National Research Council Canada
Peer reviewedYes
NPARC number21274170
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Record identifier0316d70e-859d-47db-a70e-9de6340145c7
Record created2015-02-20
Record modified2016-05-09
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