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TECHNICAL PAPERS

Impact of Surfactant Structure on the Tribological Properties of Bentonite-Based Greases

[+] Author and Article Information
A. K. Pogosian

Graduate Division, State Engineering University of Armenia, 105 Teryan Str., 375009 Yerevan, Armeniapogosian@seua.am

T. R. Martirosyan

Graduate Division, State Engineering University of Armenia, 105 Teryan Str., 375009 Yerevan, Armenia

J. Tribol 129(4), 920-922 (Mar 27, 2007) (3 pages) doi:10.1115/1.2768611 History: Received May 08, 2006; Revised March 27, 2007

The development of new types of high-pressure plastic lubricants using natural minerals is of much importance. The effects of surfactant proportion and the structure of the nanoparticle thickener surface on the tribological properties of the bentonite-based grease were studied. The plastic lubricants that provide the best anti-friction and anti-wear properties were revealed to be the one that is modified by quaternary amine and urotropine-type ammonium salts. The surface ratio of bentonite particles modified by quaternary ammonium salts, which results in composite with the best tribological properties, was also revealed.

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Copyright © 2007 by American Society of Mechanical Engineers
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Figures

Grahic Jump Location
Figure 2

Friction coefficient dependence on the ratio of the surfactant to the thickener surface of plastic composite: 1—180nm, 2—150nm, 3—80nm, and 4—25nm

Grahic Jump Location
Figure 3

Scoring index dependence upon the c ratio of the surfactant to the thickener particle surface: 1—180nm, 2—150nm, 3—80nm, and 4—25nm

Grahic Jump Location
Figure 4

Friction f coefficient and wear D characteristic dependences on the surfactant structure: 1—base oil, 2—amine (C21H50NCl), 3—amine (C26H48NCl), 4—urotropine (C17H32N4Cl2), 5— quinoline (C20H27NCl2)

Grahic Jump Location
Figure 1

Thickener particles higroscopicity Wq dependence on the surfactant structure

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