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. 2020 Jun 12;13(12):2696.
doi: 10.3390/ma13122696.

Effect of MWCNTs on Wear Behavior of Epoxy Resin for Aircraft Applications

Mateusz Mucha  1 , Aneta Krzyzak  1 , Ewelina Kosicka  2 , Emerson Coy  3 , Mikołaj Kościński  3   4 , Tomasz Sterzyński  5 , Michał Sałaciński  6
Affiliations

Effect of MWCNTs on Wear Behavior of Epoxy Resin for Aircraft Applications

Mateusz Mucha et al. Materials (Basel). .

Abstract

The aim of the study is to assess the effect of multi-walled carbon nanotubes (MWCNTs) on the wear behavior of MWCNT-doped epoxy resin. In this study, a laminating resin system designed to meet the standards for motor planes was modified with MWCNTs at mass fractions from 0.0 wt.% to 2.0 wt.%. The properties of the carbon nanotubes were determined in Raman spectroscopy and HR-TEM. An examination of wear behavior was conducted on a linear abraser with a visual inspection on an optical microscope and SEM imaging, mass loss measurement, and evaluation of the wear volume on a profilometer. Moreover, the mechanical properties of MWCNTs/epoxy nanocomposite were evaluated through a tensile test and Shore D hardness test. The study shows that the best wear resistance is achieved for the mass percentage between 0.25 wt.% and 0.5 wt.%. For the same range, the tensile strength reaches the highest values and the hardness the lowest values. Together with surface imaging and a topography analysis, this allowed describing the wear behavior in the friction node and the importance of the properties of the epoxy nanocomposite.

Keywords: carbon nanotubes; composites; epoxy resin; mechanical properties; wear.

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Conflict of interest statement

The authors declare no conflicts of interest.

Figures

Figure 1
Figure 1
(a) Geometry of the sample for tensile test where: L3—Total length: 150 mm; L1—Length of parallel edges narrow zone: 60 mm; R—Radius: 60 mm; B2—Width at ends: 20 mm; B1—Width at narrow zone: 10 mm; h—Thickness: 4 mm; L0—Reference length: 50 mm; L—Length between clamps: 115 mm. (b) Nanocomposite casted to the silicone forms.
Figure 2
Figure 2
TABER linear abraser model 5750 during the abrasion test.
Figure 3
Figure 3
HR-TEM pictures of carbon nanotubes used for MWCNT/epoxy composite.
Figure 4
Figure 4
HR-TEM—EDX results of carbon nanotubes used for MWCNT/epoxy composite.
Figure 5
Figure 5
Raman shift for MWCNTs/epoxy composite samples with 0.25, 0.5, 0.75, 1.0, and 2.0 wt.% mass fractions of carbon nanotubes and pure MWCNTs for reference.
Figure 6
Figure 6
Stress–strain curves for different MWCNTs mass fractions.
Figure 7
Figure 7
(a) Ultimate tensile strength and (b) nominal strain at break of the MWCNTs/epoxy composite for different MWCNTs mass fractions.
Figure 8
Figure 8
Correlation of mass loss and hardness in relation to MWCNTs mass fraction.
Figure 9
Figure 9
Wear process presented on the example of a MWCNTs 0.25 wt.% sample.
Figure 10
Figure 10
Topography and profiles of MWCNTs 0.25 wt.% sample after 200, 600, and 1000 wear cycles.
Figure 11
Figure 11
Bright field optical microscopy of MWCNTs (a) 0.25, (b) 0.5, (c) 0.75, (d) 0.1, and (e) 0.2 wt.%.
Figure 12
Figure 12
Profilometer topography, optical microscope images and SEM images of MWCNTs 0.25 wt.% sample after 0 and 1000 cycles of abrasive wear.
See this image and copyright information in PMC

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