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Tribological and antioxidation synergistic effect study of sulfonate-modified nano calcium carbonate.

Zhongyi H, Liping X, Sheng H, Aixi C, Jianwei Q, Xisheng F - PLoS ONE (2013)

Bottom Line: The results demonstrate that adding this synthesized additive even at a low amount (<2.0 wt.%) can evidently improve its load-carrying capacity by 1.5 times and enhance its antiwear performance; in addition, the friction-reducing effect of additive in the high load was better than that in low load.The SMC have a good synergistic antioxidation effect with T531, which verifies the nano calcium carbonate compound was a kind of multifunctional and high-performance additive.The results indicating that the excellent antiwear and load-carrying performance could be attributed to the forming of boundary lubrication film which composed of calcium carbonate, oxides, ferrites, sulphide and FeSO4, and so on.

View Article: PubMed Central - PubMed

Affiliation: School of Basic Science, East China Jiaotong University, Nanchang, PR China. zhongyihe@yahoo.com.cn

ABSTRACT
A middle base number sulphonate-modified nano calcium carbonate (SMC) with an average size of 35 nm was synthesized, and its tribological and antioxidation synergistic behaviors with ashless antioxidant N-phenyl-α-naphthylamine (T531) in hydrogenated oil (5Cst) were evaluated. The results demonstrate that adding this synthesized additive even at a low amount (<2.0 wt.%) can evidently improve its load-carrying capacity by 1.5 times and enhance its antiwear performance; in addition, the friction-reducing effect of additive in the high load was better than that in low load. The SMC have a good synergistic antioxidation effect with T531, which verifies the nano calcium carbonate compound was a kind of multifunctional and high-performance additive. The chemical composition of the rubbing surface which formed on the boundary film was analyzed by using scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). The results indicating that the excellent antiwear and load-carrying performance could be attributed to the forming of boundary lubrication film which composed of calcium carbonate, oxides, ferrites, sulphide and FeSO4, and so on. Its ability to increase oxidation free energy of base oil is the main reason for increasing its antioxidant collaboration property with ashless antioxidant T531.

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Wear scar diameter of additives.
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pone-0062050-g002: Wear scar diameter of additives.

Mentions: Figure 2 shows the wear scar diameter (WSD) at 392N and 196N. It can be seen that in the presence of SMC, the WSD decrease compared to those of the base oil. The additive possesses better antiwear property along with additives concentration increasing, meanwhile, it become smoother when additive concentrations increasing over 0.5wt%. And it possesses better antiwear property at lower load than at higher load.


Tribological and antioxidation synergistic effect study of sulfonate-modified nano calcium carbonate.

Zhongyi H, Liping X, Sheng H, Aixi C, Jianwei Q, Xisheng F - PLoS ONE (2013)

Wear scar diameter of additives.
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3643949&req=5

pone-0062050-g002: Wear scar diameter of additives.
Mentions: Figure 2 shows the wear scar diameter (WSD) at 392N and 196N. It can be seen that in the presence of SMC, the WSD decrease compared to those of the base oil. The additive possesses better antiwear property along with additives concentration increasing, meanwhile, it become smoother when additive concentrations increasing over 0.5wt%. And it possesses better antiwear property at lower load than at higher load.

Bottom Line: The results demonstrate that adding this synthesized additive even at a low amount (<2.0 wt.%) can evidently improve its load-carrying capacity by 1.5 times and enhance its antiwear performance; in addition, the friction-reducing effect of additive in the high load was better than that in low load.The SMC have a good synergistic antioxidation effect with T531, which verifies the nano calcium carbonate compound was a kind of multifunctional and high-performance additive.The results indicating that the excellent antiwear and load-carrying performance could be attributed to the forming of boundary lubrication film which composed of calcium carbonate, oxides, ferrites, sulphide and FeSO4, and so on.

View Article: PubMed Central - PubMed

Affiliation: School of Basic Science, East China Jiaotong University, Nanchang, PR China. zhongyihe@yahoo.com.cn

ABSTRACT
A middle base number sulphonate-modified nano calcium carbonate (SMC) with an average size of 35 nm was synthesized, and its tribological and antioxidation synergistic behaviors with ashless antioxidant N-phenyl-α-naphthylamine (T531) in hydrogenated oil (5Cst) were evaluated. The results demonstrate that adding this synthesized additive even at a low amount (<2.0 wt.%) can evidently improve its load-carrying capacity by 1.5 times and enhance its antiwear performance; in addition, the friction-reducing effect of additive in the high load was better than that in low load. The SMC have a good synergistic antioxidation effect with T531, which verifies the nano calcium carbonate compound was a kind of multifunctional and high-performance additive. The chemical composition of the rubbing surface which formed on the boundary film was analyzed by using scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). The results indicating that the excellent antiwear and load-carrying performance could be attributed to the forming of boundary lubrication film which composed of calcium carbonate, oxides, ferrites, sulphide and FeSO4, and so on. Its ability to increase oxidation free energy of base oil is the main reason for increasing its antioxidant collaboration property with ashless antioxidant T531.

Show MeSH
Related in: MedlinePlus