Acta Phys. -Chim. Sin. ›› 2008, Vol. 24 ›› Issue (11): 2037-2041.doi: 10.3866/PKU.WHXB20081117

• ARTICLE • Previous Articles     Next Articles

Preparation of Surface-Modified Hollow LaF3 Nanoparticles and Their Tribological Performances

MA Xue-Hui; ZHAO Yan-Bao; WU Zhi-Shen   

  1. Key Laboratory for Special Functional Materials, Henan University, Kaifeng 475004, Henan Province, P. R. China; Kaifeng Institute of Education, Kaifeng 475004, Henan Province, P. R. China
  • Received:2008-06-16 Revised:2008-08-27 Published:2008-11-10
  • Contact: ZHAO Yan-Bao E-mail:zhaoyb902@henu.edu.cn

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Abstract: Surface-modified hollow LaF3 nanoparticles were prepared in an oleate/cetyltrimethylammoniumbromide micellar emulsion. Their morphology and structure were characterized by transmission electron microscope (TEM), X-ray diffraction (XRD), Fourier transforminfrared spectroscopy (FTIR), thermal analysis (TG-DTG), and energy dispersive X-ray spectroscopy (EDS). The results showed that the LaF3 nanoparticles were hollow, with diameters of ca. 17.5 nm, and an oleate layer was present on their surfaces. The effect of additive concentration and load on nanoparticles’ antiwear and friction reduction properties (as additives in lubricating oil) were evaluated with a four-ball tester. The LaF3 nanoparticles exhibited excellent antiwear and friction reduction properties. The mechanism of hollow nanoparticle
formation was also discussed.

Key words: LaF3, Hollow structure, Antiwear performance