Ionic Liquids as Lubricants in Steel-Steel Contacts

ASME/STLE 2007 International Joint Tribology Conference, Parts A and B ◽

10.1115/ijtc2007-44462 ◽

2007 ◽

Author(s):

N. Doerr ◽

A. Schneider

Keyword(s):

Thermal Stability ◽

Ionic Liquids ◽

Friction And Wear ◽

Chemical Properties ◽

Wear Behaviour ◽

Chemical Structures ◽

Physico Chemical ◽

New Generation

A new generation of lubricants based on pure ionic liquids of varying chemical structures has been evaluated in this work. Friction and wear behaviour of these ionic liquids have been investigated by an oscillating friction and wear tester with ball-on-disk geometry. Tribological experiments have been performed at 30, 100 and 170 °C and results have been compared with three reference lubricants. Ionic liquids were found to be partly superior to the reference lubricants. The chosen ionic liquids were assessed being acceptable to excellent regarding long-term thermal stability at 100 °C. At 150 °C a few ionic liquids still fulfilled requirements of negligible degradation characterized by low evaporation rates and constant physico-chemical properties. Furthermore results clearly showed that the choice of anion and cation is decisive for physico-chemical, tribological and long-term behaviour of ionic liquids.

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Investigation of 1,2,3-trialkylimidazolium ionic liquids: experiment and density functional theory calculations

New Journal of Chemistry ◽

10.1039/c6nj03009b ◽

2017 ◽

Vol 41 (2) ◽

pp. 650-660 ◽

Cited By ~ 7

Author(s):

Snežana Papović ◽

Milan Vraneš ◽

Stevan Armaković ◽

Sanja J. Armaković ◽

Katalin Mészáros Szécsényi ◽

...

Keyword(s):

Thermal Stability ◽

Density Functional Theory ◽

Ionic Liquids ◽

Thermogravimetric Analysis ◽

Density Functional ◽

Chemical Properties ◽

Density Functional Theory Calculations ◽

Functional Theory ◽

Density Measurements ◽

Physico Chemical

Physico-chemical properties, thermal stability and bonding in 1,2,3-trialkylimidazolium based ionic liquids (ILs) were investigated by viscosity and density measurements together with thermogravimetric analysis (TGA) and IR spectroscopy.

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15N NMR studies provide insights into physico-chemical properties of room-temperature ionic liquids

Physical Chemistry Chemical Physics ◽

10.1039/d1cp01492g ◽

2021 ◽

Author(s):

Christoph Wiedemann ◽

David Fushman ◽

Frank Bordusa

Keyword(s):

Ionic Liquids ◽

Room Temperature ◽

Chemical Properties ◽

Room Temperature Ionic Liquids ◽

15N Nmr ◽

Nmr Studies ◽

Physico Chemical ◽

Alternative Solvents

Ionic liquids (ILs) have gained a lot of attention as alternative solvents in many fields of science in the last two decades. It is known that the type of anion...

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Molecular-Level Investigation of Cycloaliphatic Epoxidised Ionic Liquids as a New Generation of Monomers for Versatile Poly(Ionic Liquids)

Polymers ◽

10.3390/polym13091512 ◽

2021 ◽

Vol 13 (9) ◽

pp. 1512

Author(s):

Baris Demir ◽

Gabriel Perli ◽

Kit-ying Chan ◽

Jannick Duchet-Rumeau ◽

Sébastien Livi

Keyword(s):

Ionic Liquids ◽

Molecular Level ◽

Computational Approach ◽

Polymer Materials ◽

Chemical Structures ◽

Cycloaliphatic Epoxy ◽

Polymer Models ◽

Mechanical Performances ◽

Dynamics Simulations ◽

New Generation

Recently, a new generation of polymerised ionic liquids with high thermal stability and good mechanical performances has been designed through novel and versatile cycloaliphatic epoxy-functionalised ionic liquids (CEILs). From these first promising results and unexplored chemical structures in terms of final properties of the PILs, a computational approach based on molecular dynamics simulations has been developed to generate polymer models and predict the thermo–mechanical properties (e.g., glass transition temperature and Young’s modulus) of experimentally investigated CEILs for producing multi-functional polymer materials. Here, a completely reproducible and reliable computational protocol is provided to design, test and tune poly(ionic liquids) based on epoxidised ionic liquid monomers for future multi-functional thermoset polymers.

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Cholinium-amino acid based ionic liquids: a new method of synthesis and physico-chemical characterization

Physical Chemistry Chemical Physics ◽

10.1039/c5cp01612f ◽

2015 ◽

Vol 17 (32) ◽

pp. 20687-20698 ◽

Cited By ~ 80

Author(s):

Serena De Santis ◽

Giancarlo Masci ◽

Francesco Casciotta ◽

Ruggero Caminiti ◽

Eleonora Scarpellini ◽

...

Keyword(s):

Ionic Liquids ◽

Amino Acid ◽

Room Temperature ◽

Chemical Characterization ◽

New Method ◽

Room Temperature Ionic Liquids ◽

Synthetic Method ◽

Chemical Structures ◽

Physico Chemical ◽

Wide Range

Fourteen cholinium-amino acid based room temperature ionic liquids were prepared using a cleaner synthetic method. Chemicophysical properties were well correlated with the wide range of amino acid chemical structures.

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Ionic Liquids in Analytical Chemistry: Applications and Recent Trends

Current Analytical Chemistry ◽

10.2174/1573411017666210331113712 ◽

2021 ◽

Vol 17 ◽

Author(s):

Giuseppe Maria Merone ◽

Angela Tartaglia ◽

Enrica Rosato ◽

Cristian D’Ovidio ◽

Abuzar Kabir ◽

...

Keyword(s):

Analytical Chemistry ◽

Ionic Liquids ◽

Stationary Phases ◽

Extraction Procedure ◽

Chemical Properties ◽

Electrochemical Analysis ◽

Physico Chemical ◽

Recent Trends ◽

Number Of Publications ◽

Physical And Chemical

Background: Ionic liquids (ILs) are a unique class of compounds consisting exclusively of cations and anions that possess distinctive properties such as low volatility, high thermal stability, miscibility with water and organic solvents, electrolytic conductivity and non-flammability. Ionic liquids have been defined as "design solvents", because it is possible to modify their physical and chemical properties by appropriately choosing cations and anions, in order to meet the specific characteristics based on their potential application. Introduction: Due of their tunable nature and properties, ILs are considered as the perfect candidates for numerous applications in analytical chemistry including sample preparation, stationary phases in liquid or gas chromatography, additives in capillary electrophoresis, or in mass spectrometry for spectral and electrochemical analysis. In the last years, the number of publications regarding ILs has rapidly increased, highlighting the broad applications of these compounds in various fields of analytical chemistry. Results: This review first described the main physico-chemical characteristics of ionic liquids, and subsequently reported the various applications in different subdisciplines of analytical chemistry, including the extraction procedure and separation techniques. Furthermore, in each paragraph the most recent applications of ionic liquids in the food, environmental, biological, etc. fields have been described. Conclusion: Overall, the topic discussed highlights the key role of ionic liquids in analytical chemistry, giving hints for their future applications in chemistry but also in biology and medicine.

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Model-free kinetics applied to evaluate the long-term thermal stability of three [NTf2] anion-based ionic liquids

Thermochimica Acta ◽

10.1016/j.tca.2017.08.002 ◽

2017 ◽

Vol 656 ◽

pp. 70-84 ◽

Cited By ~ 2

Author(s):

D. Blanco ◽

P. Oulego ◽

D. Ramos ◽

B. Fernández ◽

J.M. Cuetos

Keyword(s):

Thermal Stability ◽

Ionic Liquids ◽

Model Free ◽

Model Free Kinetics ◽

Thermal Stability Of

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Topological characterization of dendrimer, benzenoid, and nanocone

Zeitschrift für Naturforschung C ◽

10.1515/znc-2018-0153 ◽

2018 ◽

Vol 74 (1-2) ◽

pp. 35-43

Author(s):

Wei Gao ◽

Muhammad Kamran Siddiqui ◽

Najma Abdul Rehman ◽

Mehwish Hussain Muhammad

Keyword(s):

Chemical Properties ◽

Chemical Compounds ◽

Topological Indices ◽

Zagreb Index ◽

Topological Characterization ◽

Complex Molecules ◽

Chemical Structures ◽

Physico Chemical ◽

Quantitative Structure Activity Relationships

Abstract Dendrimers are large and complex molecules with very well defined chemical structures. More importantly, dendrimers are highly branched organic macromolecules with successive layers or generations of branch units surrounding a central core. Topological indices are numbers associated with molecular graphs for the purpose of allowing quantitative structure-activity relationships. These topological indices correlate certain physico-chemical properties such as the boiling point, stability, strain energy, and others, of chemical compounds. In this article, we determine hyper-Zagreb index, first multiple Zagreb index, second multiple Zagreb index, and Zagreb polynomials for hetrofunctional dendrimers, triangular benzenoids, and nanocones.

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