Tribological Properities of Oil-Based ZnO Nanofluids

Abstract:

In this research, the friction and wear characteristics of nanofluids were studied through experimental investigation by dispersing ZnO nanoparticles into 60SN base oil. Oleic acid was used as a surfactant for the improved dispersibility and stability of nanofluids. Nanoparticles were dispersed using a magnetic stirring apparatus and ultrasonic bath. The micro/nano mechanics comprehensive test system UNMT- 1 wear testing machine was used to evaluate the friction properties. The wear track was measured by a Zeiss laser confocal microscope and scanning electron microscope (SEM). The effect of ZnO nanoparticles on the friction and wear performance of the nanofluids was investigated, and the optimal ratio between the surfactant and particle concentration was studied. The results showed that oil-based nanofluids with ZnO nanoparticles could reduce friction and wear under certain conditions. The optimally stable concentration of the fluids was that the oleic acid adding quantity was 5wt%～10wt% and ZnO nano-particles was 0.2wt%～0.7wt%. And when the oleic acid adding quantity was 10wt% and ZnO nanoparticles was 0.2 wt%, the nanofluids had best friction-reducing and anti-wear properties.

• Periodical: Key Engineering Materials (Volumes 645-646)
• Pages: 437-443
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.645-646.437
• Online since: May 2015
• Authors: Xu Ran*, Xue Ying Yu, Yong Wang, Zhe Xiao
• Keywords: Nanofluids, Oleic Acid, Tribological Properities, ZnO Nanoparticles

References

[1] M. J. Mulvihill, S. E. Habas, I. Jen-La Plante, J. Wan, and T. Mokari, Influence of size, shape and surface coating on the stability of aqueous suspensions of CdSe nanoparticles, Chemistry of Materials, vol. 22, no. 18, p.5251–5257, (2010).

DOI: 10.1021/cm101262s

[2] E. Amstad, S. Zurcher, A. Mashaghi, J. Y. Wong, M. Textor, and E. Reimhult, Surface functionalization of single superparamagnetic iron oxide nanoparticles for targeted Magnetic resonance imaging, Small, vol. 5, no. 11, p.1334–1342, (2009).

DOI: 10.1002/smll.200801328

[3] Battez A.H., Gonzalez R., Viesca J.L., Fernandez J.E., et al., CuO, ZrO2 and ZnO nanoparticles as antiwear additive in oil lubricants, Wear 265(3-4): 422-428, (2008).

DOI: 10.1016/j.wear.2007.11.013

[4] Luan Gara, Qian Zou, Friction and wear characteristics of water-based ZnO and Al2O3 nanofluids, Tribology Transactions, 55: 3, (2012) 345-35.

DOI: 10.1080/10402004.2012.656879

[5] Yu W., Xie H., Chen L., and Li Y., Investigation of thermal conductivity and viscosity of ethylene glycol based ZnO nanofluid, Thermochim. Acta 491(1-2): 92-96, (2009).

DOI: 10.1016/j.tca.2009.03.007

[6] Lee S., Choi S., Li S., and Eastman J., Measuring thermal conductivity of fluids containing oxide nanoparticles, J. Heat Transf. -Trans. ASME 121(2): 280-289, (1999).

DOI: 10.1115/1.2825978

[7] Saidur R., Leong K.Y., and Mohammad H.A., A review onapplications and challenges of nanofluids, Renew. Sust. Energ. Rev. 15 (3): 1646-1668, (2011).

[8] Colangelo G., Favale E., De Risi A., and Laforgia D., Results of experimental investigations on the heat conductivity of nanofluids based on diathermic oil for high temperature applications, Appl. Energy 97(0): 828-833, (2012).

DOI: 10.1016/j.apenergy.2011.11.026

[9] Lee K., Hwang Y., Cheong S., Choi Y., et al., Understanding the Role of Nanoparticles in Nano-oil Lubrication, Tribol. Lett. 35(2): 127-131, (2009).

DOI: 10.1007/s11249-009-9441-7

[10] Hwang Y., Lee J., Lee J., Jeong Y., et al., Production and dispersion stability of nanoparticles in nanofluids, Powder Technol 186(2): 145-153, (2008).

DOI: 10.1016/j.powtec.2007.11.020

[11] Hernandez Battez, A., Gonzalez, R., Viesca, J. L., Fernandez, J. E., Diaz Fernandez, J. M., Machado, A., Chou, R., and Riba, J, CuO, ZrO2and ZnO Nanoparticles as Antiwear Additive in Oil Lubricants, " Wear, 265(3–4), p.422–428, (2008).

DOI: 10.1016/j.wear.2007.11.013

[12] Wu, Y. Y., Tsui, W. C., and Liu, T. C., Experimental Analysis of Tribological Properties of Lubricating Oils with Nanoparticle Additives, Wear, 262(7–8), p.819–825, (2007).

DOI: 10.1016/j.wear.2006.08.021

[13] Gara, L. and Zou, Q. (2012), Friction and Wear Characteristics of Water-Based ZnO and Al2O3Nanofluids, Tribology Transactions, 55(3), p.345–350.

DOI: 10.1080/10402004.2012.656879

[14] Yu, H. -L., Xu, Y., Shi, P. -J., Xu, B. -S., Wang, X. -L., and Liu, Q. (2008).

[15] Kao, M. -J. and Lin, C. -R. (2009), Evaluating the Role of Spherical Titanium Oxide Nanoparticles in Reducing Friction between Two Pieces of Cast Iron, Journal of Alloys and Compounds, 483(1–2), p.456–459.

DOI: 10.1016/j.jallcom.2008.07.223