탄소 나노소재를 이용한 윤활유 기반 나노유체의 제조 및 평가

최철; 정미희; 오제명; Cheol Choi; Mi-Hee Jung; Jae-Myung Oh

Korean Journal of Materials Research, Vol.19, No.3, 156-162, March, 2009

DOI10.3740/MRSK.2009.19.3.156 Export Citation

탄소 나노소재를 이용한 윤활유 기반 나노유체의 제조 및 평가

Preparation and Characterization of Lubricating Oil-based Nanofluids Containing Carbon Nanoparticles

최철^†, 정미희, 오제명

한국전력 전력연구원 전략기술연구소 전력소재그룹

Cheol Choi^†, Mi-Hee Jung, and Jae-Myung Oh

Advanced Materials Research Group, Strategic Technology Laboratory, KEPRI, Taejon 305-380, Korea

E-mail:

Lubricant-based nanofluids were prepared by dispersing carbon nanoparticles in gear oil. In this study, the effects of the particle size, shape and dispersity of the particles on the tribological properties of nanofluids were investigated. Dispersion experiments were conducted with a high-speed bead mill and an ultrasonic homogenizer, and the surfaces of the nanoparticles were simultaneously modified with several dispersants. The effective thermal conductivity of the nanofluids was measured by the transient hot-wire method, and the tribological behaviors of the nanofluids were also investigated with a disk-on-disk tribo-tester. The results of this study clearly showed that the combination of the nanoparticles, the deagglomeration process, the dispersant and the dispersion solvent is very important for the dispersity and tribological properties of nanofluids. Lubricant-based nanofluids showed relatively low thermal conductivity enhancement, but they were highly effective in decreasing the frictional heat that was generated. For nanofluids containing 0.1vol.% graphite particles in an oil lubricant, The friction coefficient in the boundary and fluid lubrication range was reduced to approximately 70% of the original value of pure lubricant.

Keywords:nanofluid;lubricant oil;friction coefficient;dispersion;surface modification

[References]

Keblinski P, Eastman JA, Cahill DG, Materials Today, 8, 36 (2005)
Lee S, Choi SUS, Li S, Eastman JA, J. Heat Transfer., 121, 280 (1999)
Das SK, Putra N, Thiesen P, Roetzel W, ASME J. Heat Transfer, 125, 567 (2003)
Eastman JA, Choi SUS, Li S, Yu W, Thompson LJ, Appl. Phys. Lett., 78, 718 (2001)
Xie H, Lee H, Youn W, Choi M, J. Appl. Phys., 94, 4967 (2003)
Eastman JA, Choi SUS, Li S, Thompson LJ, Lee S, MRS Symposium Proceedings, 457, 3 (1997)
Wang X, Xu X, Choi SUS, J. Thermophys. Heat Transfer., 13, 474 (1999)
Xie H, Wang J, Xi T, Liu Y, Ai F, Wu Q, J. Appl. Phys., 91, 4568 (2002)
Choi SUS, Zhang ZG, Yu W, Lockwood FE, Grulke EA, Appl. Phys. Lett., 79, 2252 (2001)
Wu YY, Tsui WC, Liu TC, Wear, 262, 819 (2007)
Fernandez Rico E, Minondo I, Garcia Cuervo D, Wear, 262, 1399 (2007)
Hernandez Battez A, Gonzalez R, Viesca JL, Fernandez JE, Diaz Fernandez JM, Machado A, Chou R, Riba J, Wear, 265, 422 (2008)
Tarasov S, Kolubaev A, Belyaev S, Lerner M, Tepper F, Wear, 252, 63 (2002)

[Referenced By]

[1] Keblinski P, Eastman JA, Cahill DG, Materials Today, 8, 36 (2005)

[2] Lee S, Choi SUS, Li S, Eastman JA, J. Heat Transfer., 121, 280 (1999)

[3] Das SK, Putra N, Thiesen P, Roetzel W, ASME J. Heat Transfer, 125, 567 (2003)

[4] Eastman JA, Choi SUS, Li S, Yu W, Thompson LJ, Appl. Phys. Lett., 78, 718 (2001)

[5] Xie H, Lee H, Youn W, Choi M, J. Appl. Phys., 94, 4967 (2003)

[6] Eastman JA, Choi SUS, Li S, Thompson LJ, Lee S, MRS Symposium Proceedings, 457, 3 (1997)

[7] Wang X, Xu X, Choi SUS, J. Thermophys. Heat Transfer., 13, 474 (1999)

[8] Xie H, Wang J, Xi T, Liu Y, Ai F, Wu Q, J. Appl. Phys., 91, 4568 (2002)

[9] Choi SUS, Zhang ZG, Yu W, Lockwood FE, Grulke EA, Appl. Phys. Lett., 79, 2252 (2001)

[10] Wu YY, Tsui WC, Liu TC, Wear, 262, 819 (2007)

[11] Fernandez Rico E, Minondo I, Garcia Cuervo D, Wear, 262, 1399 (2007)

[12] Hernandez Battez A, Gonzalez R, Viesca JL, Fernandez JE, Diaz Fernandez JM, Machado A, Chou R, Riba J, Wear, 265, 422 (2008)

[13] Tarasov S, Kolubaev A, Belyaev S, Lerner M, Tepper F, Wear, 252, 63 (2002)