Synthesis and tribological evaluation of three tetraalkylammonium thiomolybdate (R4N)2MoS4 (R = methyl, propyl, or ammonia) aqueous-based lubricant additives on a ball-on-disk tribometer was carried out for a steel–aluminum contact. Tests were performed at the same conditions of load, entrainment speed, sliding distance, temperature, and concentration of MoS2 to compare the activity (lubrication effect) of the thiomolybdates prepared. A friction reduction is observed for the three salts compared to pure water; however, significant differences in friction coefficient are observed depending on the alkyl group. SEM/EDAX and Raman analysis of the wear tracks reveal the in-contact formation of a MoS2-lubricating film, rich in molybdenum and sulfur.
This is a preview of subscription content, log in to check access.
Buy single article
Instant access to the full article PDF.
Price includes VAT for USA
Subscribe to journal
Immediate online access to all issues from 2019. Subscription will auto renew annually.
This is the net price. Taxes to be calculated in checkout.
Hsu, S.M.: Boundary lubrication: current understanding. Tribol. Lett. 3, 1–11 (1997)
Smorygo, O., Voronin, S., Bertrand, P., Smurov, I.: Fabrication of thick molybdenum disulphide coatings by thermal-diffusion synthesis. Tribol. Lett. 17, 723–726 (2004)
Stipanovic, A.J., Schoonmaker, J.P.: The impact of organomolybdenum compounds on the frictional characteristics of crankcase engine oils. SAE Technical Paper No. 932779, SAE, Warrendale, PA (1993)
Hamaguchi, H., Maeda, Y., Maeda, T.: Fuel efficient motor oil for Japanese passenger cars. SAE Technical Paper No. 810316, SAE, Warrendale, PA (1981)
Hu, J., Zhu, H., Li, W., Li, F., Zong, Z.: Study on tribological properties and action mechanism of organic cadmium compound in lubricants. Wear 259, 519–523 (2005)
Jianqiang, H., Xianyong, W., Junbing, Y., Feng, X., Huanqin, Z., Fazheng, Z.: Tribological performance and action mechanism of cadmium dialkyldithiophosphate. Tribol. Trans. 48, 171–175 (2005)
Rastogi, R.B., Yadav, M.: Suspension of molybdenum–sulphur complexes in paraffin oil as extreme pressure lubricants. Tribol. Int. 36, 511–516 (2003)
Cizaire, L., Vacher, B., Le Mogne, T., Martin, J.M., Rapoport, L., Margolin, A., Tenne, R.: Mechanisms of ultra-low friction by hollow inorganic fullerene-like Mos2 nanoparticles. Surf. Coat. Technol. 160, 282–287 (2002)
Parenago, O.P., Bakunin, V.N., Kuzmina, G.N., Suslov, A.Y., Vedeneeva, L.M.: Molybdenum sulfide nanoparticles as new-type additives to hydrocarbon lubricants. Dokl. Chem. 383, 86–88 (2002)
Unnikrishnan, R., Jain, M.C., Harinarayan, A.K., Metha, A.K.: Additive–additive interaction: an XPS study of the effect of ZDDP on the AW/EP characteristics of molybdenum based additives. Wear 252, 240–249 (2002)
Gatto, V.J., Devlin, M.T.: Lubricant containing molybdenum compound and secondary diarylamine. US Patent 5650381, 1997
Arai, K., Tomizawa, H.: Lubricating oil composition. US Patent 5605880, 1997
Shaub, H.: Mixed antioxidant composition. US Patent 6306803, 2001
DeVries, L., King, J.: Antioxidant combinations of molybdenum complexes and aromatic amine compounds. US Patent 4370246, 1983
Bec, S., Tonck, A., Georges, J.M., Roper, G.W.: Synergistic effects of MoDTC and ZDTP on frictional behaviour of tribofilms at the nanometer scale. Tribol. Lett. 17, 797–809 (2004)
Sulek, M.W., Wasilewski, T.: Antiseizure properties of aqueous solutions of compounds forming liquid crystalline structures. Tribol. Lett. 18, 197–205 (2005)
Maejima, M., Saruwatari, K., Takaya, M.: Friction behaviour of anodic oxide film on aluminum impregnated with molybdenum sulfide compounds. Surf. Coat. Technol. 132, 105–110 (2000)
Xuedong, W., Haigang, C., Shengrong, Y., Dapu, W.: In situ triboreduction of organo-copper compound in titanium alloys tapping. Wear 250, 362–365 (2001)
Jain, V.K., Shukla, D.S.: Study of the EP activity of water-soluble inorganic metallic salts for aqueous cutting fluids. Wear 193, 226–234 (1996)
Duan, B.: A study on colloidal PSt—a new type of water-based lubrication additive. Wear 236, 235–239 (1999)
Jiang, G., Guan, W., Zheng, Q.: A study on fullerene–acrylamide copolymer nanoball—a new type of water-based lubrication additive. Wear 258, 1625–1629 (2005)
Lei, H., Guan, W., Luo, J.: Tribological behavior of fullerene–styrene sulfonic acid copolymer as water-based lubricant additive. Wear 252, 345–350 (2002)
Hollinger, S., Georges, J.M., Mazuyer, D., Lorentz, G., Aguerre, O., Du, N.: High-pressure lubrication with lamellar structures in aqueous lubricant. Tribol. Lett. 9, 143–151 (2001)
Alonso, G., Aguirre, G., Rivero, I.A., Fuentes, S.: Synthesis and characterization of tetraalkylammonium thiomolybdates and thiotungstates in aqueous solution. Inorg. Chim. Acta 274, 108–110 (1998)
Alonso, G., Berhault, G., Aguilar, A., Collins, V., Ornelas, C., Fuentes, Chianelli, R.R.: Characterization and HDS activity of mesoporous MoS2 catalysts prepared by in situ activation of tetraalkylammonium thiomolybdates. J. Catal. 208, 359–369 (2002)
Alonso, G., Berhault, G., Chianelli, R.R.: Synthesis and characterization of tetraalkylammonium thimolybdates and thiotungstates in aqueous solution. Inorg. Chim. Acta 316, 105–109 (2001)
Alonso, G., Berhault, G., Paraguay, F., Rivera, E., Fuentes, S., Chianelli, R.R.: Mesoporous carbon-containing MoS2 materials formed from the in situ decomposition of tetraalkylammonium thiomolybdate. Mater. Res. Bull. 38, 1045–1055 (2003)
Alonso, G., Yang, J., Siadati, M.H., Chianelli, R.R.: Synthesis of tetraalkylammonium thiometallates in aqueous solution. Inorg. Chim. Acta 325, 193–197 (2001)
Jiménez-Sandoval, S., Yang, D., Frindt, R.F., Irwin, J.C.: Raman study and lattice dynamics of single molecular layers of MoS2. Phys. Rev. B 44, 3955–3962 (1991)
The authors wish to express their sincere thanks to the National Council for Science and Technology (CONACyT—Projects 46871 and 43634) for the financial support to carry out the present work.
About this article
Cite this article
Chiñas-Castillo, F., Lara-Romero, J., Alonso-Núñez, G. et al. MoS2 Films Formed by In-contact Decomposition of Water-soluble Tetraalkylammonium Thiomolybdates. Tribol Lett 29, 155–161 (2008). https://doi.org/10.1007/s11249-007-9292-z
- Film forming