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. 2017 Jul 10;10(7):776. doi: 10.3390/ma10070776

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© 2017 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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SEM micrograph of different fracture surfaces. (a) Crack initiation site 1 wt % D-CNF epoxy; (b) fast fracture site of 1 wt % D-CNF epoxy; (c) crack initiation site of 1 wt % V-CNF epoxy; and (d) fast fracture site of 1 wt % V-CNF epoxy.

SEM micrograph of different fracture surfaces. (a) Crack initiation site 1 wt % D-CNF epoxy; (b) fast fracture site of 1 wt % D-CNF epoxy; (c) crack initiation site of 1 wt % V-CNF epoxy; and (d) fast fracture site of 1 wt % V-CNF epoxy.