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. 2021 Apr 7;14(8):1835.
doi: 10.3390/ma14081835.

Carbon Fiber Reinforced Polymer Composites Doped with Graphene Oxide in Light of Spectroscopic Studies

Paulina Florek  1 , Magdalena Król  1 , Piotr Jeleń  1 , Włodzimierz Mozgawa  1
Affiliations

Carbon Fiber Reinforced Polymer Composites Doped with Graphene Oxide in Light of Spectroscopic Studies

Paulina Florek et al. Materials (Basel). .

Abstract

Carbon fiber reinforced polymer composites are a dynamically developing group of lightweight composites for applications in the automotive, wind energy, aerospace, and sports sectors. Interfacial connection is the weakest place in these materials. In this study, an attempt was made to improve adhesion between carbon fiber and epoxy resin. For this purpose, nanoparticles of graphene oxide were added to a polymer matrix. The results of the three-point bend test showed that the strength of samples with added graphene oxide increased. Improvement of adhesion between components, reduction of the pull-out effect and change in the method of crack propagation were observed. An attempt was made to explain this effect using spectroscopic methods, both IR and Raman. On the basis of the obtained results, chemical bonds between the individual components of the composites were identified.

Keywords: CFRP–carbon fiber reinforced polymers; DRIFT spectroscopy; Raman spectroscopy; graphene oxide; laminate.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Stages of sample preparation: (a) preparation for the lamination process, (b) hardening of the laminate under pressure, (c) hardened composite, and (d) cut and marked samples for testing.
Figure 2
Figure 2
IR (a) and Raman spectrum (b) of graphene oxide (GO).
Figure 3
Figure 3
Scanning electron microscopy (SEM) images (a) and Raman spectrum (b) of the virgin carbon fibers (CFs).
Figure 4
Figure 4
Microscopic photo (a), histogram of particle size distribution (b), and Raman images (the brighter the field, the greater the intensity) (c) of graphene oxide dispersed in epoxy resin.
Figure 5
Figure 5
Raman spectra of (a) epoxy resin and (b) graphene oxide particle.
Figure 6
Figure 6
DRIFT spectra of (a) epoxy resin and (b) epoxy resin modified by graphene oxide.
Figure 7
Figure 7
Stress-strain curves of three-point bending test samples for composites with: (a) 0; (b) 0.3, and (c) 0.5% graphene oxide (GO).
Figure 8
Figure 8
SEM images of the fractured surfaces of (a–c) the reference sample and (d–f) the sample with 0.3% GO addition.
Figure 9
Figure 9
DRIFT spectra of (a) the carbon fiber reinforced polymers (CFRP) sample and (b) the CFRP sample with 0.3% GO addition.
Figure 10
Figure 10
Proposed mechanism of GO influences on the CFRP composite: (a) GO to carbon fiber (CF) bonding [32]; (b) resin hardening reaction; and (c) proposed mechanism of combining fibers with resin.
Figure 11
Figure 11
Raman images of (a) the reference CFRP composite and (b) the CFRP sample with 0.3% GO addition.
See this image and copyright information in PMC

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