scholarly journals Halogen-free pyrrolidinium bis(mandelato)borate ionic liquids: some physicochemical properties and lubrication performance as additives to polyethylene glycol

RSC Advances ◽  
2014 ◽  
Vol 4 (58) ◽  
pp. 30617-30623 ◽  
Author(s):  
Mamoun Taher ◽  
Faiz Ullah Shah ◽  
Andrei Filippov ◽  
Patrick de Baets ◽  
Sergei Glavatskih ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Polyethylene Glycol ◽  
Physicochemical Properties ◽  
Friction Coefficients ◽  
Lubrication Performance ◽  
Halogen Free

Friction coefficients for a pyrrolidinium orthoborate ionic liquid as 3 wt% additive in PEG, neat PEG and 5W40.

scholarly journals Understanding the thermal decomposition mechanism of a halogen-free chelated orthoborate-based ionic liquid: a combined computational and experimental study

2016 ◽  
Vol 18 (32) ◽  
pp. 22458-22466 ◽  
Author(s):  
M. Golets ◽  
M. R. Shimpi ◽  
Y.-L. Wang ◽  
O. N. Antzutkin ◽  
S. Glavatskih ◽  
...  
Keyword(s):  
Experimental Study ◽  
Thermal Decomposition ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Physicochemical Properties ◽  
Vapour Pressure ◽  
Lubricant Additives ◽  
Thermal Decomposition Mechanism ◽  
Halogen Free ◽  
Significant Attention

In the last few decades, ionic liquids (ILs) have gained significant attention as lubricants and lubricant additives due to their polar nature, low vapour pressure and tunable physicochemical properties.

Functionalized Ionic Liquids as Lubricants for Steel-Steel Contact

2011 ◽  
Vol 138-139 ◽  
pp. 630-634 ◽  
Author(s):  
Li Ye Zhu ◽  
Li Gong Chen ◽  
Xin Yang ◽  
Hong Bin Song
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Physicochemical Properties ◽  
Tribological Properties ◽  
Friction And Wear ◽  
Friction Mechanisms ◽  
Ester Group ◽  
Friction Reducing

A new series of functionalized ionic liquids containing ester-group were synthesized through a typical two-step way. The physicochemical properties of the functionalized ionic liquids were studied and the tribological properties of them as lubricants for steel-steel contact were evaluated on an SRV friction and wear tester and compared with the perfluoroalkylpolyether (PFPE), a low-volatility and fluorine containing lubricant, and a conventional ionic liquid, 1-butyl-3-methy imidazolium tetrafluoroborate (LB104), which is nonfunctionalized. Results showed that all the ionic liquids studied in this paper have better lubricities than PFPE as lubricants for steel-steel friction pairs. Functionalized ionic liquids show worse friction reducing abilities at relatively lower loads, which could be ascribed to their higher viscosities, but they always exhibit better anti-wear abilities than LB104. The possible friction mechanisms were discussed.

Physicochemical properties of pentaglyme–sodium bis(trifluoromethanesulfonyl)amide solvate ionic liquid

2014 ◽  
Vol 16 (23) ◽  
pp. 11737-11746 ◽  
Author(s):  
Shoshi Terada ◽  
Toshihiko Mandai ◽  
Risa Nozawa ◽  
Kazuki Yoshida ◽  
Kazuhide Ueno ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Physicochemical Properties ◽  
Room Temperature ◽  
Room Temperature Ionic Liquids

An equimolar complex of pentaglyme (G5) and sodium bis(trifluoromethanesulfonyl)amide (Na[TFSA]) behaves like room-temperature ionic liquids and is a promising electrolyte for Na-ion batteries.

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.

scholarly journals Processes and Properties of Ionic Liquid-Modified Nanofiller/Polymer Nanocomposites—A Succinct Review

Processes ◽  
2021 ◽  
Vol 9 (3) ◽  
pp. 480
Author(s):  
Ahmad Adlie Shamsuri ◽  
Siti Nurul Ain Md. Jamil ◽  
Khalina Abdan
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Physicochemical Properties ◽  
Polymer Composites ◽  
Polymer Nanocomposites ◽  
Polymer Composite ◽  
Chemical Properties ◽  
The Many

Ionic liquids can typically be synthesized via protonation, alkylation, metathesis, or neutralization reactions. The many types of ionic liquids have increased their attractiveness to researchers for employment in various areas, including in polymer composites. Recently, ionic liquids have been employed to modify nanofillers for the fabrication of polymer nanocomposites with improved physicochemical properties. In this succinct review, four types of imidazolium-based ionic liquids that are employed as modifiers—specifically alkylimidazolium halide, alkylimidazolium hexafluorophosphate, alkylimidazolium tetrafluoroborate, and alkylimidazolium bistriflimide—are reviewed. Additionally, three types of ionic liquid-modified nanofiller/polymer nanocomposites—namely ionic liquid-nanofiller/thermoplastic nanocomposites, ionic liquid-nanofiller/elastomer nanocomposites, and ionic liquid-nanofiller/thermoset nanocomposites—are described as well. The effect of imidazolium-based ionic liquids on the thermo-mechanico-chemical properties of the polymer nanocomposites is also succinctly reviewed. This review can serve as an initial guide for polymer composite researchers in modifying nanofillers by means of ionic liquids for improving the performance of polymer nanocomposites.

scholarly journals Tribochemistry and thermo-oxidative stability of halogen-free ionic liquids

RSC Advances ◽  
2017 ◽  
Vol 7 (77) ◽  
pp. 48766-48776 ◽  
Author(s):  
Vladimir Totolin ◽  
Lucia Pisarova ◽  
Nicole Dörr ◽  
Ichiro Minami
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Oxidative Stability ◽  
Room Temperature ◽  
Room Temperature Ionic Liquid ◽  
Iron Phosphates ◽  
Halogen Free ◽  
First Time

The formation of binary iron phosphates/phosphides based tribofilms from a phosphonium phosphate room-temperature ionic liquid has been reported for the first time.

scholarly journals A Succinct Review on the PVDF/Imidazolium-Based Ionic Liquid Blends and Composites: Preparations, Properties, and Applications

Processes ◽  
2021 ◽  
Vol 9 (5) ◽  
pp. 761
Author(s):  
Ahmad Adlie Shamsuri ◽  
Rusli Daik ◽  
Siti Nurul Ain Md. Jamil
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Composite Materials ◽  
Physicochemical Properties ◽  
Polymer Blend ◽  
Vinylidene Fluoride ◽  
Poly Vinylidene Fluoride

Poly(vinylidene fluoride) (PVDF) is a versatile thermoplastic fluoropolymer with intriguing characteristics, which is receiving considerable attention from researchers in many areas. Recently, PVDF and its copolymer, such as poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) have been blended with ionic liquids to produce blend and composite materials for target applications. In this succinct review, two types of ionic liquids that are utilized for the preparation of PVDF and PVDF-HFP blends and composites, namely, hydrophilic and hydrophobic imidazolium-based ionic liquids, are reviewed. In addition, the effect of the ionic liquids on the physicochemical properties of the PVDF and PVDF-HFP blends and composites, is described as well. On top of that, a multitude of applications of the blends and composites are also succinctly reviewed. This review may give inspirations to the polymer blend and composite researchers in diversifying the applications of thermoplastic fluoropolymers through the utilization of ionic liquids.

Substitution effect in reversible gel-liquid phase transformation polyoxometalate ionic liquid compounds

2016 ◽  
Vol 45 (28) ◽  
pp. 11256-11260 ◽  
Author(s):  
Xuefei Wu ◽  
Huaxue Cai ◽  
Qingyin Wu ◽  
Wenfu Yan
Keyword(s):  
Ionic Liquid ◽  
Phase Transformation ◽  
Ionic Liquids ◽  
Liquid Phase ◽  
Physicochemical Properties ◽  
Substitution Effect ◽  
High Conductivity ◽  
Reversible Gel

The substitution effect on a series of POM-type ionic liquids, has been investigated. The physicochemical properties of the ILs are highly related to their structures. When protons are substituted for ammonium, high conductivity and better thermostability are observed.

Accurate prediction of energetic properties of ionic liquid clusters using a fragment-based quantum mechanical method

2017 ◽  
Vol 19 (31) ◽  
pp. 20657-20666 ◽  
Author(s):  
Jinfeng Liu ◽  
Xiao He
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Physicochemical Properties ◽  
Accurate Prediction ◽  
Quantum Mechanical ◽  
Mechanical Method ◽  
Energetic Properties ◽  
Quantum Mechanical Method ◽  
Liquid Clusters

Accurate prediction of physicochemical properties of ionic liquids (ILs) is of great significance to understand and design novel ILs with unique properties.

scholarly journals Dehalogenation of polychlorinated biphenyls (PCB) by nucleofile reactants at the presence of ionic liquids and under application of microwaves

2013 ◽  
Vol 13 (1) ◽  
pp. 59-64
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Polyethylene Glycol ◽  
Polychlorinated Biphenyls ◽  
Nucleophilic Substitution ◽  
Reaction Rate ◽  
Microwave Field ◽  
Laboratory Scale ◽  
Chlorine Atoms ◽  
Dielectric Fluids

Laboratory-scale experiments were performed in order to examine the effect of microwave field on the effectiveness of KPEG method (nucleophilic substitution of the chlorine atoms in a molecule of PCBs by alkaline polyethylene glycol PEG) in the removal of PCBs from highly contaminated mineral oils with the content of indicator congeners (No 28,52,101,53,138 and 180) above 5500 mg kg-1. Results show that the microwave field significantly increases the reaction rate and the method’s effectiveness in the removal of chlorine from the molecules of PCBs. Addition of a small amount of an ionic liquid, in this case 1-butyl-3-methylimidazolium hexafluorophosphate–[bmim][PF6], significantly positively affects the results obtained under the influence of microwave field. The KPEG method enhanced by the application of microwaves could be used in practice for decontamination and recycling of PCB-containing dielectric fluids in electric capacitors and transformers. High efficiencies of the reaction were achieved even when microwaves were applied with no PEG added, only by the presence of alkaline hydroxide or by the presence of a small amount, up to ca. 2%, of an ionic liquid [bmim][PF6]. The microwave enhanced KPEG method might has some advantages for practical uses in decontamination applications.

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