Limits...
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.

Show MeSH
XPS spectra of the characteristic elements of SMC and s on worn surface lubricated by 1.0 wt% SMC/5Cst at 392 N for 30 min.
© Copyright Policy
Related In: Results  -  Collection


getmorefigures.php?uid=PMC3643949&req=5

pone-0062050-g006: XPS spectra of the characteristic elements of SMC and s on worn surface lubricated by 1.0 wt% SMC/5Cst at 392 N for 30 min.

Mentions: In order to understand the tribological mechanism of the SMC in the lubricating oil, the additive-derived elements: carbon, oxygen, sulfur, and calcium were detected by XPS analysis, and these elements which analysed of worn surface lubricated with SMC at 392 N for 30 min were also detected by XPS. The results were shown in figure 6.


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)

XPS spectra of the characteristic elements of SMC and s on worn surface lubricated by 1.0 wt% SMC/5Cst at 392 N for 30 min.
© Copyright Policy
Related In: Results  -  Collection

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

pone-0062050-g006: XPS spectra of the characteristic elements of SMC and s on worn surface lubricated by 1.0 wt% SMC/5Cst at 392 N for 30 min.
Mentions: In order to understand the tribological mechanism of the SMC in the lubricating oil, the additive-derived elements: carbon, oxygen, sulfur, and calcium were detected by XPS analysis, and these elements which analysed of worn surface lubricated with SMC at 392 N for 30 min were also detected by XPS. The results were shown in figure 6.

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