纳米偏硼酸钙/还原石墨烯润滑添加剂的制备及摩擦学性能

doi:10.11896/cldb.20080317

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Abstract In order to study the preparation of surface modified nano-calcium metaborate/reduced graphene lubricant additives, nano-calcium metaborate/reduced graphene composite powders were prepared by plasma assisted ball milling with calcium metaborate and reduced graphene as raw materials and oleic acid as modifier, thier tribological properties were tested. The morphologies of nano-calcium metaborate/reduced graphene composites were observed by scanning electron microscope, transmission electron microscope, X-ray diffractometer and infrared spectrometer. The surface of the friction pair was tested by shape measuring laser microscope and scanning electron microscope. Oil samples were detected by MOA Ⅱ oil analysis spectrometer. The results indicated that under the synergistic effect of ball milling and plasma heat effect, the calcium metaborate powder pre-milled for 10 h were refined to about 10 nm and uniformly loaded on the reduced grapheme after subsequent assisted ball milling for 10 h. The surface of calcium metaborate particles was heated rapidly by plasma and thermal explosion was caused, so part of the calcium metaborate powder splashed on the reduced graphene, which was then coated into a spherical composite structure. Plasma assisted ball milling introduced carboxyl groups on the surface of calcium metaborate after 10 h pre-milling and conducted an ester reaction with the hydroxyl group on the surface of reduced grapheme during subsequent 10 h milling. The surface modification of calcium metaborate and reduced graphene by oleic acid was in-situ completed successfully, and the prepared nano-calcium metaborate/reduced graphene composite powders had good dispersion in 5w-40 base oil. In the process of friction, the reduced graphene adsorbed on the friction surface due to its large specific surface area, and spherical nano-calcium metaborate coated by reduced graphene made the rolling friction of multi-activity centers on the friction pair surface, thereby the anti-friction and anti-wear performance of the composite oil was effectively improved.

Key words： nano-calcium metaborate/reduced graphene lubricant additive plasma assisted ball milling surface modification tribological properties

Published: 12 November 2021

CLC number:

TB383

Fund:National Natural Science Foundation of China (51779103), the Natural Science Foundation of Fujian Province (2021J01848, 2018J01498), Open Research Fund of Fujian Shipping Research Institute of Jimei University.

Corresponding Authors: daileyang@jmu.edu.cn

About author:: Jingyao Guo, a graduate student in the School of Marine Engineering, Jimei University, mainly studies the preparation of nano-composite lubricant additives and its application in marine engineering.
Leyang Dai, professor and doctoral supervisor at the School of Marine Engineering, Jimei University. In 2006, he obtained a Ph.D. in materials processing engineering from South China University of Technology. He has published more than 30 papers in domestic and foreign academic journals and applied for 8 national invention patents. His research focus: prevention and control of marine engine friction and wear, ocean corrosion and protection, turbine fault diagnosis, etc.

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	GUO Jingyao
	HOU Xianbin
	WEI Yukun
	DAI Leyang
	LIAO Haifeng
	SUN Di

Cite this article:

GUO Jingyao,HOU Xianbin,WEI Yukun, et al. Preparation and Tribological Properties of Nano-Calcium Metaborate/Reduced Graphene Lubricant Additive[J]. Materials Reports, 2021, 35(20): 20011-20015.

URL:

http://www.mater-rep.com/EN/10.11896/cldb.20080317 OR http://www.mater-rep.com/EN/Y2021/V35/I20/20011

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