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Synthesis and Tribological Properties of Stearic Acid-Modified Anatase (TiO2) Nanoparticles

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Abstract

Anatase (TiO2) nanoparticles with an average diameter of 10 nm were synthesized by solvothermal method followed by surface modification with stearic acid (SA). As-prepared, the nanoparticles (SA-TiO2) were characterized by X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), Fourier transform infrared spectroscopy (FT-IR), and thermogravimetry (TGA) and differential scanning calorimetry (DSC). The tribological properties of SA-TiO2 as an additive of liquid paraffin (LP) were evaluated by a four-ball tester. The results show that LP with SA-TiO2 exhibited good anti-wear and friction-reduction properties under the all applied loads. Comparing LP with LP-containing SA, LP-containing TiO2, and LP-containing SA-TiO2, the LP-containing SA-TiO2 had the best load-carrying capacity. It was deduced that the boundary lubricating film was mainly composed of TiO2 deposits and an adsorbing film of SA which contribute to the excellent lubricating effect of SA-TiO2 in LP.

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Acknowledgments

The authors are grateful to the Innovative Research Group Foundation from NSFC (No. 50421502) and the 973 Program of Chinese Ministry of Science and Technology (No. 2007CB607601) for financial support of this research work.

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Correspondence to Jianmin Chen.

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Zhang, L., Chen, L., Wan, H. et al. Synthesis and Tribological Properties of Stearic Acid-Modified Anatase (TiO2) Nanoparticles. Tribol Lett 41, 409–416 (2011). https://doi.org/10.1007/s11249-010-9724-z

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  • DOI: https://doi.org/10.1007/s11249-010-9724-z

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