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Niskotemperaturowe ciecze jonowe jako nowe bazy substancji smarowych

Ogorzałek Marta

Abstract

One of the ways to prevent the adverse effects of friction is use of lubricants. They are engineering materials, which in lubricating friction pairs, play a role comparable to the materials of which friction pairs are constructed. They consist of a base and additives modifying properties of lubricants. The base is the main component of lubricant and determines its performance characteristics. The interest in room temperature ionic liquids (RTILs) as a modern base of lubricants is a result of analysis of this type of liquid properties, which meet a number of criteria postulated during formulating of lubricating oils. The most important are: a wide temperature interval in which they remain liquid, thermal and oxidative stability, incombustibility and low vapour pressure which is practically non-measurable in a number of liquids. An important aspect of ionic liquids use is possibility to obtain salts creating this ionic liquids with preset properties. This is an interesting example of materials engineering at the level of synthesis. The issue of the use of ionic liquids as base of lubricants is pioneering and fits into the current trend of tribological research in the world. The aim of the research conducted within the framework of the doctoral thesis was to demonstrate at the experimental way the possibility of using ionic liquids as novel, , environmentally safe base for lubricants. Aim of the work has been carried out by the experimental confirmation of the influence of type and structure of ionic liquids on the tribological and physicochemical properties. Four basic groups of ionic liquids: ammonium, imidazolium, phosphonium and pyridinium were selected for this study. In total, 28 of ionic liquids have been studied. The reference base was mineral oil due to its ecological properties and universality of application. Based on the results of a comprehensive study on influence of the type and structure of ionic liquids on their physicochemical and tribological properties it has been concluded that RTILs can be used safely and effectively as base of lubricants. Tribological and physicochemical properties of room temperature ionic liquids are comparable or even better than traditional base of lubricants (mineral oil). Moreover, by appropriate selection of the type of RTILs (a combination of cation and anion) it is possible to obtain a new type of lubricants base characterized by unique physicochemical properties, determining correct operation of friction pairs of machinery and equipment in both standard and extreme conditions of friction.
Record ID
WUTa60cf6efca4b4095a410578863284841
Diploma type
Doctor of Philosophy
Author
Ogorzałek Marta Ogorzałek Marta,, Undefined Affiliation
Title in Polish
Niskotemperaturowe ciecze jonowe jako nowe bazy substancji smarowych
Language
(pl) Polish
Certifying Unit
Faculty of Materials Science and Engineering (FMSE)
Discipline
material sciences and engineering / (technology domain) / (technological sciences)
Status
Finished
Start date
30-03-2012
Defense Date
19-12-2014
Title date
19-12-2014
Supervisor
Sułek Marian Sułek Marian,, Undefined Affiliation
Pages
194
Keywords in English
s
Abstract in English
One of the ways to prevent the adverse effects of friction is use of lubricants. They are engineering materials, which in lubricating friction pairs, play a role comparable to the materials of which friction pairs are constructed. They consist of a base and additives modifying properties of lubricants. The base is the main component of lubricant and determines its performance characteristics. The interest in room temperature ionic liquids (RTILs) as a modern base of lubricants is a result of analysis of this type of liquid properties, which meet a number of criteria postulated during formulating of lubricating oils. The most important are: a wide temperature interval in which they remain liquid, thermal and oxidative stability, incombustibility and low vapour pressure which is practically non-measurable in a number of liquids. An important aspect of ionic liquids use is possibility to obtain salts creating this ionic liquids with preset properties. This is an interesting example of materials engineering at the level of synthesis. The issue of the use of ionic liquids as base of lubricants is pioneering and fits into the current trend of tribological research in the world. The aim of the research conducted within the framework of the doctoral thesis was to demonstrate at the experimental way the possibility of using ionic liquids as novel, , environmentally safe base for lubricants. Aim of the work has been carried out by the experimental confirmation of the influence of type and structure of ionic liquids on the tribological and physicochemical properties. Four basic groups of ionic liquids: ammonium, imidazolium, phosphonium and pyridinium were selected for this study. In total, 28 of ionic liquids have been studied. The reference base was mineral oil due to its ecological properties and universality of application. Based on the results of a comprehensive study on influence of the type and structure of ionic liquids on their physicochemical and tribological properties it has been concluded that RTILs can be used safely and effectively as base of lubricants. Tribological and physicochemical properties of room temperature ionic liquids are comparable or even better than traditional base of lubricants (mineral oil). Moreover, by appropriate selection of the type of RTILs (a combination of cation and anion) it is possible to obtain a new type of lubricants base characterized by unique physicochemical properties, determining correct operation of friction pairs of machinery and equipment in both standard and extreme conditions of friction.
Thesis file
  • File: 1
    Ogorzałek.pdf
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Citation count
2

Uniform Resource Identifier
https://repo.pw.edu.pl/info/phd/WUTa60cf6efca4b4095a410578863284841/
URN
urn:pw-repo:WUTa60cf6efca4b4095a410578863284841

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