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. 2022 Nov 10;15(22):7951.
doi: 10.3390/ma15227951.

Tribological Properties of Carbon Fabric/Epoxy Composites Filled with FGr@MoS2 Hybrids under Dry Sliding Conditions

Wen Zhong  1   2 , Siqiang Chen  1   2 , Lei Ma  1 , Zhe Tong  3
Affiliations

Tribological Properties of Carbon Fabric/Epoxy Composites Filled with FGr@MoS2 Hybrids under Dry Sliding Conditions

Wen Zhong et al. Materials (Basel). .

Abstract

Hybrids of fluorinated graphite/MoS2 (FGr@MoS2) were prepared via a hydrothermal method and used as lubricating additives to take full advantage of the synergy between FGr and MoS2 in carbon-fiber-reinforced polymer (CFRP). The results show a 21.6% reduction in the friction coefficient compared to the neat sample when the CFRP was filled with 1.2 wt.% FGr@MoS2 hybrids. The addition of 1.5 wt.% FGr@MoS2 resulted in a 60.9% reduction in the wear rate compared to neat CFRP. For the 1.2 wt.% FGr@MoS2-reinforced CFRP, the friction coefficient maintained a relatively steady value of approximately 0.46 at various temperatures, indicating frictional stability. However, the wear rate increased by 13.95% at 60 °C compared to that at room temperature. The interfacial bonding force between the FGr@MoS2 hybrid and the matrix, as well as the adhesive force with the surface of the counterpart ball, is improved, caused by the heterostructure of FGr@MoS2, resulting in enhanced mechanical properties and formation efficiency as well as the transfer film on the surface of the counterpart ball. The results suggest that an FGr@MoS2 micro-nano structure is a promising additive to be applied in polymer tribology.

Keywords: CFRP; FGr@MoS2 hybrid; dry sliding; self-lubricating; temperature.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Test principle of dry sliding.
Figure 2
Figure 2
(a) Raman spectrum of FGr@MoS2 hybrid, (b) XRD pattern of FGr@MoS2 hybrid, and (c) SEM image of FGr@MoS2 hybrid.
Figure 3
Figure 3
(a) Real-time friction curve and (b) average friction coefficient of CFRP containing different contents of FGr@MoS2 hybrid.
Figure 4
Figure 4
(a) Wear rate and (b) Vickers hardness of CFRP containing different contents of the FGr@MoS2 hybrid.
Figure 5
Figure 5
3D morphologies of the worn surface of: (a) FGr@MoS2-0; (b) FGr@MoS2-0.3; (c) FGr@MoS2-0.6; (d) FGr@MoS2-0.9; (e) FGr@MoS2-1.2; (f) FGr@MoS2-1.5.
Figure 6
Figure 6
Wear track profiles of CFRP containing different contents of FGr@MoS2: (a) FGr@MoS2-0; (b) FGr@MoS2-0.3; (c) FGr@MoS2-0.6; (d) FGr@MoS2-0.9; (e) FGr@MoS2-1.2; (f) FGr@MoS2-1.5.
Figure 7
Figure 7
Optical images of worn surface of composites containing different contents of FGr@MoS2 under room temperature: (a) FGr@MoS2-0; (b) FGr@MoS2-0.3; (c) FGr@MoS2-0.6; (d) FGr@MoS2-0.9; (e) FGr@MoS2-1.2; (f) FGr@MoS2-1.5.
Figure 8
Figure 8
Worn surfaces of counterpart ball sliding against: (a) FGr@MoS2-0; (b) FGr@MoS2-0.3; (c) FGr@MoS2-0.6; (d) FGr@MoS2-0.9; (e) FGr@MoS2-1.2; (f) FGr@MoS2-1.
Figure 9
Figure 9
Tribological properties of FGr@MoS2-1.2 at different temperatures: (a) friction coefficient and (b) wear rate.
Figure 10
Figure 10
Three–dimensional morphologies of the worn surface of FGr@MoS2-1.2 at (a) 23 °C, (b) 40 °C, and (c) 60 °C. Wear track profiles of MoS2-1.2 at (d) 23 °C, (e) 40 °C, and (f) 60 °C.
Figure 11
Figure 11
Optical images of worn surface of FGr@MoS2-1.2 at (a) 23 °C, (b) 40 °C, and (c) 60 °C; counterpart ball at (d) 23 °C, (e) 40 °C, and (f) 60 °C.
Figure 12
Figure 12
Friction mechanism of CFRP: (a) without hybrid; (b) containing hybrid.
See this image and copyright information in PMC

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