Tuning azolium azolate ionic liquids to promote surface interactions with titanium nanoparticles leading to increased passivation and colloidal stability

2012 ◽  
Vol 14 (38) ◽  
pp. 13194 ◽  
Author(s):  
Parker D. McCrary ◽  
Preston A. Beasley ◽  
Steven P. Kelley ◽  
Stefan Schneider ◽  
Jerry A. Boatz ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Colloidal Stability ◽  
Surface Interactions ◽  
Titanium Nanoparticles

scholarly journals Tuning the colloidal stability in ionic liquids by controlling the nanoparticles/liquid interface

Soft Matter ◽  
2014 ◽  
Vol 10 (8) ◽  
pp. 1097 ◽  
Author(s):  
M. Mamusa ◽  
J. Siriex-Plénet ◽  
F. Cousin ◽  
E. Dubois ◽  
V. Peyre
Keyword(s):  
Ionic Liquids ◽  
Colloidal Stability ◽  
Liquid Interface

On the chemical synthesis of titanium nanoparticles from ionic liquids

2010 ◽  
Vol 141 (12) ◽  
pp. 1273-1278 ◽  
Author(s):  
Ayi A. Ayi ◽  
Varsha Khare ◽  
Peter Strauch ◽  
Jérôme Girard ◽  
Katharina M. Fromm ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Chemical Synthesis ◽  
Titanium Nanoparticles

Ionic Liquids Interactions with Materials Surfaces Applications in Tribology and Nanotechnology

2008 ◽  
Vol 1082 ◽  
Author(s):  
Maria-Dolores Bermúdez ◽  
Francisco-José Carrión ◽  
Patricia Iglesias ◽  
Ana-Eva Jiménez ◽  
Ginés Martínez-Nicolás ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
High Vacuum ◽  
Extreme Temperature ◽  
Chemical Properties ◽  
Surface Interactions ◽  
Present Moment ◽  
Reaction Products ◽  
Wear Rates ◽  
Molecular Features ◽  
Metal Metal

ABSTRACTThe extraordinary combination of high thermal stability, low volatility and the possibility of tailoring the physical and chemical properties of ionic liquids (ILs) by modifying their molecular features such as the length and nature of the cation lateral chains and the anion size and composition, has open the field of application of these green ordered fluids.ILs have shown their ability to provide effective lubrication with very low friction coefficients and wear rates under conditions for which the currently used lubricating fluids fail. These conditions cover strategic technologies such as aerospace, microelectronics and nanotechnology applications.At the present moment, there exist no liquid lubricants for high temperature, high vacuum and cryogenic conditions. We have determined the lubricating ability of ILs under extreme temperature conditions.We have determined the conditions for the formation of tribocorrosion reaction products at metal-metal and metal-polymer interfaces. In the case of fluorine or phosphorus-containing imidazolium ionic liquids, formation of metallic fluorides and phosphates at the contact surfaces is the determining wear mechanism step.The surface interactions of imidazolium room temperature ILs have been studied in a variety of materials in sliding contact under variable conditions, both as neat lubricants and as additives of conventional basestocks.The ability of ILs molecules to interact with surfaces has also been explored in nanotechnology applications. It is well known that the use of ILs as solvents in the synthetic route, allows the control of size and shape of a variety of nanoparticles. We have developed new polymer/IL/nanoparticle nanocomposites where the size, morphology and distribution of the nanoparticles are controlled by surface interactions with IL molecules.

Friction and Wear Properties of Halogen-Free and Halogen-Containing Ionic Liquids Used As Neat Lubricants, Lubricant Additives and Thin Lubricant Layers

2017 ◽  
Author(s):  
Hong Guo ◽  
Rui Liu ◽  
Alfonso Fuentes-Aznar ◽  
Patricia Iglesias Victoria
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Friction And Wear ◽  
Mineral Oil ◽  
Surface Interactions ◽  
Lubricant Additives ◽  
Wear Properties ◽  
Sem Images ◽  
Wear Reduction ◽  
Halogen Free

The lubricating ability of one halogen-free and one halogen-containing phosphonium-based ionic liquids are investigated as neat lubricants, lubricant additives and thin lubricant layers in steel-steel contact. The use of the ionic liquids in any of the three lubricating methods reduced friction and wear compared to a base mineral oil. The halogen-free ionic liquid outperformed the halogen-containing ionic liquid in the three methods of lubrication. The highest friction and wear reduction were obtained when ionic liquids were used as neat lubricants. Under this condition, friction reductions of 37.21% and 25.73 %, and wear reduction of 47.12% and 41.18% compared to the based mineral oil were obtained for the halogen-free and halogen-containing ionic liquids respectively. The wear mechanisms and surface interactions are discussed in terms of ionic liquid-metal surface interactions from optical and SEM images and EDS analysis.

Colloidal Stability in Ionic Liquids and Relevant Soft Materials

2012 ◽  
Vol 1473 ◽  
Author(s):  
Kazuhide Ueno ◽  
Masayoshi Watanabe
Keyword(s):  
Ionic Liquids ◽  
Colloidal Particles ◽  
Colloidal Stability ◽  
Surface Force ◽  
Soft Materials ◽  
Electrolyte Solutions ◽  
Colloidal Systems ◽  
Dispersion Media ◽  
And Performance ◽  
Solvation Forces

ABSTRACTIonic liquids (ILs) are receiving a great deal of attention as synthetic and dispersion media for colloidal systems, as well as alternatives to organic solvents and electrolyte solutions. Colloidal stability is an essential factor for determining the properties and performance of colloidal systems combined with ILs. The remarkable properties of ILs primarily originate from their highly ionic nature. While such high ionic strength often causes colloidal aggregation in aqueous and organic dispersions, certain colloidal particles can be well dispersed in ILs without any stabilizers. First, we will discuss the colloidal stability of bare and polymer-grafted silica nanoparticles and the surface force between silica substrates in ILs. Three different repulsions between colloidal particles—electrostatic, steric, and solvation forces—will be highlighted. A possible interpretation of the stabilization mechanism in ILs, both in the presence and in the absence of stabilizers, will be proposed. Next, we will provide an overview of our recent studies on colloidal soft materials with ILs. On the basis of dispersed states of the silica colloids, two different soft materials, colloidal gel and colloidal glass in ILs, were fabricated. Their functional properties (such as ionic transport, rheological properties, and optical properties) and the microstructure of the colloidal materials will also be presented.

From Colloidal Stability in Ionic Liquids to Advanced Soft Materials Using Unique Media

Langmuir ◽  
2011 ◽  
Vol 27 (15) ◽  
pp. 9105-9115 ◽  
Author(s):  
Kazuhide Ueno ◽  
Masayoshi Watanabe
Keyword(s):  
Ionic Liquids ◽  
Colloidal Stability ◽  
Soft Materials

Colloidal Stability of Bare and Polymer-Grafted Silica Nanoparticles in Ionic Liquids

Langmuir ◽  
2008 ◽  
Vol 24 (10) ◽  
pp. 5253-5259 ◽  
Author(s):  
Kazuhide Ueno ◽  
Aya Inaba ◽  
Masashi Kondoh ◽  
Masayoshi Watanabe
Keyword(s):  
Ionic Liquids ◽  
Silica Nanoparticles ◽  
Colloidal Stability

Graphene and Graphene Oxide Can “Lubricate” Ionic Liquids based on Specific Surface Interactions Leading to Improved Low-Temperature Hypergolic Performance

2012 ◽  
Vol 51 (39) ◽  
pp. 9784-9787 ◽  
Author(s):  
Parker D. McCrary ◽  
Preston A. Beasley ◽  
Spencer A. Alaniz ◽  
Chris S. Griggs ◽  
Rachel M. Frazier ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Ionic Liquids ◽  
Low Temperature ◽  
Specific Surface ◽  
Surface Interactions
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