Oil-miscible, halogen-free, and surface-active lauryl sulphate-derived ionic liquids for enhancement of tribological properties

Khan, Amzad; Yasa, Sathyam Reddy; Gusain, Rashi; Khatri, Om P.

doi:10.1016/j.molliq.2020.114005

Cited by 27 publications

(8 citation statements)

References 56 publications

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“…The TGA plot shows the onset of decomposition of SAIL at ca. 530 K, as shown in Figure , which is similar to that of ammonium-based ILs with other surface-active anions like dodecyl sulfate …”

Section: Resultssupporting

confidence: 72%

“…530 K, as shown in Figure 3, which is similar to that of ammonium-based ILs with other surface-active anions like dodecyl sulfate. 39 The DSC trace of [N 8,8,8,8 ][EHS] in Figure 4a shows a couple of thermal events during heating and cooling scans. During the heating cycle from 213 K with a heating rate of 10 K min −1 , three thermal events can be seen occurring at ca.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

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Nonhalogenated Surface-Active Ionic Liquid as an Electrolyte for Supercapacitors

Jain

Antzutkin

2021

ACS Appl. Energy Mater.

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We report a nonhalogenated surface-active ionic liquid (SAIL) that consists of the surface-active anion 2-ethylhexyl sulfate and the tetraoctylammonium cation ([N8,8,8,8][EHS]). We explored the thermal and electrochemical properties, i.e., degradation, melting and crystallization temperatures, ionic conductivity, and electrochemical potential window of neat SAIL and its binary mixture with acetonitrile. This SAIL was tested as an electrolyte in a multiwalled carbon nanotube (MWCNT)-based supercapacitor at various temperatures from 298 to 373 K. In addition, we also tested the binary mixture of SAIL with acetonitrile as an electrolyte at lower temperatures (253–298 K). The electrochemical performance of SAIL and the SAIL/acetonitrile binary mixture as a function of temperature was compared with that of a standard electrolyte, an aqueous solution of 6 M KOH, in the same MWCNT-based supercapacitor. The solution resistance (R s), charge transfer resistance (R ct), and equivalent series resistance (ESR) decreased with an increase in temperature for all SAIL-based electrolytes. We found that the supercapacitor cell with SAIL as an electrolyte has a high specific capacitance (C elec in F g–1), a high energy density (E in Wh kg–1), and a high power density (in W kg–1) compared to those for the binary mixture of SAIL with acetonitrile and for the 6 M KOH aqueous electrolytes, particularly at elevated temperatures. For the SAIL/MWCNT-based supercapacitor, C elec increased from 75 F g–1 at 298 K to 169 F g–1 at 373 K, whereas the energy density increased from 42 Wh kg–1 (at 298 K) to 94 Wh kg–1 (at 373 K) and the power density increased from 75 kW kg–1 (at 298 K) to 169 kW kg–1 (at 373 K) at a scan rate of 2 mV s–1 (potential window = 4 V). This study reveals that SAIL can potentially be used as an electrolyte for high-temperature electrochemical applications for energy storage devices.

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Section: Resultssupporting

confidence: 72%

Section: ■ Experimental Sectionmentioning

confidence: 99%

Nonhalogenated Surface-Active Ionic Liquid as an Electrolyte for Supercapacitors

Jain

Antzutkin

2021

ACS Appl. Energy Mater.

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“…Similar mechanisms have been reported in the work. 19,30 Imidazolium-based IL1 has a long alkyl chain length that prevents the direct contact of mating surfaces. 31 Similar anti-wear and anti-friction mechanisms have been reported in the work 23 for [EMIM][DCN] IL1 in steel and steel contact.…”

Section: Resultsmentioning

confidence: 99%

“…Tribological characteristics of ideal PEG 200 oil were improved with lauryl sulphate–based ILs. 19 Syahir et al investigated the tribological performance of two phosphonium-based IL and 1-butyl-3-methylimidazolium tetrafluoroborate as an additive in polyalphaolefin (PAO8) and trimethylolpropane trioleate (TMPTO) using four-ball and high-frequency reciprocating rig tribotesters. Results revealed that tribological performance was improved for both PAO8 and TMPTO at an optimum concentration of 1 wt.%.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of tribological properties of vegetable oil–based ionanolubricants: An experimental study

Kumar

Garg

2023

Proceedings of the Institution of Mechanical Engineers, Part J:

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Growing environment concern has forced us for the development of environmentally acceptable lubricants. In this study, tribological properties of sesame oil and castor oil containing imidazolium-based ionic liquid 1-ethyl 3methylimidazolium dicyanamide ([EMIM][DCN]) (IL1), phosphonium-based ionic liquid Trihexyltetradecylphosphonium bis(2,4,4-trimethylpentyl) phosphinate ([P66614][BTMPP]) (IL2) and titanium oxide (TiO2) nanoparticles (NPs) as hybrid additives have been investigated using four-ball tester with ASTM D4172B. Three different concentrations of IL1, IL2 and TiO2 NPs were selected for the formulation of vegetable oil–based ionanolubricants. It was found that castor oil with the addition of 0.03[Formula: see text] of TiO2 NPs and 1.3 vol.% of IL1 shows the lowest specific wear rate amongst all investigated lubricant samples. It is evident from field emission scanning electron microscopy analysis of worn-out surfaces of steel balls that a combination of ball bearing effect and tribofilm formation is responsible for the improved tribological characteristics.

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“…Among them, the friction-reducing and anti-wear additives play an indispensable role in alleviating the friction and wear of the contact area by forming a physical adsorption/deposition film and/or tribochemical reaction film on the rubbing surfaces [28][29][30][31][32][33][34]. The traditional friction-reducing and anti-wear additives are usually composed of organic polar materials, such as organic molybdenum compounds [35][36][37], polymers [38], alcohols [39], esters [40][41][42], amine compounds [43], organic salts [44], ionic liquids, and their derivatives [45][46][47][48][49][50]. The strong polarity allows them to form neat adsorption films on the metallic rubbing surfaces to reduce the friction and wear of friction pairs.…”

Section: Introductionmentioning

confidence: 99%

Applications of carbon quantum dots in lubricant additives: a review

Tang

Zhang

2021

J Mater Sci

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Advances in lubricants are vital to the pursuit of energy efficiency and sustainable development. It is well known that the essence of lubricating oil is lubricant additives, especially the friction-reducing and anti-wear additives. Carbon quantum dots (CQDs), a novel zero-dimensional carbon-based nanomaterial, have attained growing expectations in material and chemical sciences because of their extraordinary properties such as low toxicity and environmentally friendly, high chemical and thermal stability, and good designability. Since their discovery, CQDs have shown great potential in many applications including sensors, medicine, photovoltaic devices, biology, and tribology. The latest application of CQDs as the high-performance friction-reducing and antiwear additives has garnered increasing attention. With the in-depth study, CQDs have gradually exhibited their excellent tribological properties, especially acted as additives in lubricating base oils. This paper has reviewed the progress in the research and development of CQDs-based lubricant additives by introducing lots of successful applications of CQDs-based additives in the present work and then highlighted the friction-reducing and anti-wear property, superiority, as well as the lubrication mechanism of CQDs as an additive, along with some discussion on challenges and perspectives in this significant and promising field. Finally, we offered a series of suggestions for developing the next-generation high-performance CQDs-based lubricant additives.

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Oil-miscible, halogen-free, and surface-active lauryl sulphate-derived ionic liquids for enhancement of tribological properties

Cited by 27 publications

References 56 publications

Nonhalogenated Surface-Active Ionic Liquid as an Electrolyte for Supercapacitors

Nonhalogenated Surface-Active Ionic Liquid as an Electrolyte for Supercapacitors

Evaluation of tribological properties of vegetable oil–based ionanolubricants: An experimental study

Applications of carbon quantum dots in lubricant additives: a review

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