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Journal of Environmental Accounting and Management 5(2) (2017) 145--152 | DOI:10.5890/JEAM.2017.06.006

Yanqiu Xia$^{1}$, Shengguang Zhao$^{1}$,$^{2}$, Xin Feng$^{1}$

$^{1}$ School of Energy Power and Mechanical Engineering, North China Electric Power University, Beijing 102206, China

$^{2}$ Shenhua Group Corporation Ltd, No. 22, Binhe Road, West Andingmen, Dongcheng District, Beijing, 100011,China

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Abstract

The friction behavior of leaf-surface wax of two desert plants, Ammopiptanthus mongolicus and Reaumuria soongorica, as additives were evaluated on an aluminum-on-steel system, glycerol and molybdenum-dithiocarbamate (MoDTC) as compaire additive. A Gas chromatography-mass spectrometry (GC-MS) analysis system was performed to identify the composition of Ammopiptanthus mongolicus leaf wax. Scanning electron microscopy and X-ray photoelectron spectroscopy(XPS) were employed to explore the friction mechanisms of Ammopiptanthus mongolicus leaf-surface wax. The poly-alpha-olefin (PAO) containing leaf-surface wax showed a better friction reducing and wear resistance properties than that of containing glycerol and MoDTC, respectively. The results show that the leaf-surface wax of desert plants could effectively reduce the friction and wear of aluminum-on-steel sliding pairs compared with the PAO containing MoDTC, and glycerol as additives. Especially, Ammopiptanthus mongolicus showed high performance anti-wear and friction reducing properties. The excellent tribological properties were attributed to the wax composition of leafsurface fatty acid, alcohol, and esters.

Acknowledgments

This work was supported by National Natural Science Foundation of China (No. 51575181).

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