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Int. J. Mol. Sci. 2009, 10(9), 4102-4115;

Liquid Crystals in Tribology

Grupo de Ciencia de Materiales e Ingeniería Metalúrgica. Departamento de Ingeniería de Materiales y Fabricación. Universidad Politécnica de Cartagena. Campus de la Muralla del Mar. C/Doctor Fleming s/n. 30202-Cartagena, Spain
Author to whom correspondence should be addressed.
Received: 2 September 2009 / Revised: 11 September 2009 / Accepted: 16 September 2009 / Published: 18 September 2009
(This article belongs to the Special Issue Liquid Crystals)
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Two decades ago, the literature dealing with the possible applications of low molar mass liquid crystals, also called monomer liquid crystals (MLCs), only included about 50 references. Today, thousands of papers, conference reports, books or book chapters and patents refer to the study and applications of MLCs as lubricants and lubricant additives and efforts are made to develop new commercial applications. The development of more efficient lubricants is of paramount technological and economic relevance as it is estimated that half the energy consumption is dissipated as friction. MLCs have shown their ability to form ordered boundary layers with good load-carrying capacity and to lower the friction coefficients, wear rates and contact temperature of sliding surfaces, thus contributing to increase the components service life and to save energy. This review includes the use of MLCs in lubrication, and dispersions of MLCs in conventional polymers (PDMLCs). Finally, new lubricating system composed of MLC blends with surfactants, ionic liquids or nanophases are considered. View Full-Text
Keywords: monomer liquid crystals; lubrication; tribology monomer liquid crystals; lubrication; tribology
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Carrión, F.-J.; Martínez-Nicolás, G.; Iglesias, P.; Sanes, J.; Bermúdez, M.-D. Liquid Crystals in Tribology. Int. J. Mol. Sci. 2009, 10, 4102-4115.

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