Abstract
Sample preparation is an important step when testing the mechanical properties of materials. Especially, when carbon nanotubes (CNT) are added to epoxy resin, the increase in viscosity complicates the casting of testing specimens. We present a vacuum casting approach for different geometries in order to produce specimens from functional nanocomposites that consist of epoxy matrix and oxidized multi-walled carbon nanotubes (MWCNTs). The nanocomposites were characterized with various mechanical tests that showed improved fracture toughness, bending and tensile properties performance by addition of oxidized MWCNTs. Strengthening mechanisms were analyzed by SEM images of fracture surfaces and in-situ imaging by digital image correlation (DIC).
Highlights
Carbon nanotubes (CNTs) can be used as nanoscale fillers in order to improve the mechanical, electrical and thermal properties of polymers
The multi-walled carbon nanotubes (MWCNTs) oxidized according to an oxidation procedure using 30% H2 O2 aqueous solution [3], MWCNTs oxidized according to an oxidation procedure using
MWCNTs in epoxy resin wereusing investigated under the(TRM)
Summary
Carbon nanotubes (CNTs) can be used as nanoscale fillers in order to improve the mechanical, electrical and thermal properties of polymers. Molecules 2018, 23, x oxidized CNTs show similar performance in mechanical tests of CNT/epoxy to amine-functionalized band [12]. The advantage of oxidized CNTs is that oxidation can be carried out in a single step, mechanical tests of CNT/epoxy to amine-functionalized CNTs [13]. In the present study, oxidized MWCNTs, produced by a “green” process [3], were dispersed in epoxy resin by calendering on a three-roll mill (TRM), which is one of the most successful techniques epoxy resin by calendering on a three-roll mill (TRM), which is one of the most successful techniques for the dispersion of CNTs in viscous matrices [14,15]. The resulting CNT/epoxy nanocomposites were mechanically tested in tensile and bending mode.
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