Remarkable Lubricating Effect of Ionic Liquid Modified Carbon Dots as a Kind of Water-Based Lubricant Additives

NANO ◽  
2017 ◽  
Vol 12 (09) ◽  
pp. 1750108 ◽  
Author(s):  
Xiang Liu ◽  
Zhiyu Huang ◽  
Weiwei Tang ◽  
Baogang Wang
Keyword(s):  
Ionic Liquid ◽  
Carbon Dots ◽  
Lubricant Additive ◽  
Wear Volume ◽  
One Pot ◽  
Load Carrying ◽  
Water Based ◽  
Antiwear Properties ◽  
The Mean ◽  
Base Liquid

Ionic liquid modified carbon dots (CDs-IL) were successfully synthesized by one-pot pyrolysis. The tribological properties of CDs-IL as a kind of water-based lubricant additive were investigated under four-ball mode. The experimental results demonstrated that the added CDs-IL not only increased load-carrying capacity of base liquid but also displayed remarkable friction-reducing and antiwear properties. At an optimal concentration of 0.05[Formula: see text]wt.% and a proper load of 50[Formula: see text]N, the mean friction coefficient and wear volume reduced by 65% and 60%, respectively. The remarkable lubricating effect of CDs-IL was attributed to the boundary tribofilm formed by absorption and deposition of CDs-IL on rubbing surfaces. The lubricating effect of CDs-IL especially antiwear effect greatly attenuated when the load was lower or higher than 50 N because the function of deposition tribofilm formed by CDs-IL was suppressed by the absorption tribofilm or tribochemical film derived from triethanolamine in base liquid, respectively.

scholarly journals Black phosphorus quantum dots: A new-type of water-based high-efficiency lubricant additive

Friction ◽  
2020 ◽  
Author(s):  
Weiwei Tang ◽  
Zhiqiang Jiang ◽  
Baogang Wang ◽  
Yufeng Li
Keyword(s):  
Quantum Dots ◽  
High Efficiency ◽  
Lubricant Additive ◽  
Black Phosphorus ◽  
Friction Reduction ◽  
Wear Volume ◽  
Wear Properties ◽  
Water Based ◽  
Black Phosphorus Quantum Dots ◽  
Base Liquid

AbstractBlack phosphorus quantum dots (BPQDs), obtained via a typical solution-based top-down method, were used as water-based lubricant additives. BPQDs exhibited remarkable friction reduction and anti-wear properties even at the ultra-low concentration of 0.005 wt%, which reduced the friction coefficient and wear volume of the base liquid by 32.3% and 56.4%, respectively. In addition, the load-supporting capacity of the base liquid increased from 120 N to over 300 N. BPQDs-based additives exhibited a relatively long lifetime at a relatively high load of 80 N. The performance of BPQDs considerably exceeded that of the BP; this may be attributed to their small and uniform particle size, good dispersion stability in water, and high reactivity at the frictional surfaces. The results of the surface wear resistance analysis demonstrated that a robust tribochemical film with a thickness of approximately 90 nm was formed on the rubbing surface lubricated with 0.005 wt% of BPQDs dispersion. Moreover, the film served as a direct evidence of the excellent tribological performance of BPQDs.

scholarly journals Antifriction and Antiwear Properties of an Ionic Liquid with Fluorine-Containing Anion Used as Lubricant Additive

2017 ◽  
Vol 65 (2) ◽  
Author(s):  
D. Blanco ◽  
R. González ◽  
J. L. Viesca ◽  
A. Fernández-González ◽  
M. Bartolomé ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Lubricant Additive ◽  
Antiwear Properties

One-pot pyrolysis preparation of carbon dots as eco-friendly nanoadditives of water-based lubricants

Carbon ◽  
2019 ◽  
Vol 152 ◽  
pp. 511-520 ◽  
Author(s):  
Yiwen Hu ◽  
Yongxin Wang ◽  
Chunting Wang ◽  
Yuwei Ye ◽  
Haichao Zhao ◽  
...  
Keyword(s):  
Carbon Dots ◽  
One Pot ◽  
Water Based

Facile pyrolysis synthesis of ionic liquid capped carbon dots and subsequent application as the water-based lubricant additives

2018 ◽  
Vol 54 (2) ◽  
pp. 1171-1183 ◽  
Author(s):  
Weiwei Tang ◽  
Baogang Wang ◽  
Junting Li ◽  
Yangzheng Li ◽  
Yin Zhang ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Carbon Dots ◽  
Lubricant Additives ◽  
Water Based ◽  
Subsequent Application ◽  
Pyrolysis Synthesis

Colloidal Polystyrene-Carbon Nanotubes as Water-Based Lubricant Additive

2011 ◽  
Vol 228-229 ◽  
pp. 253-258
Author(s):  
Xue Feng Li ◽  
Han Yan ◽  
Shao Xian Peng
Keyword(s):  
Carbon Nanotubes ◽  
Electron Microscope ◽  
Lubricant Additive ◽  
Test Results ◽  
Transmission Electron ◽  
Load Carrying ◽  
Water Based ◽  
New Type ◽  
Lubrication Additive ◽  
Ball Test

A new type of water-based lubrication additive — colloidal polystyrene-carbon nanotubes (PSt-CNTs) has been prepared. Transmission electron microscope shows that the PSt-CNT colloids are tubes with tiny balls in nanometer scale. Four-ball test results indicate that both the load-carrying capacity and anti-wear of the colloidal PSt-CNTs are much superior to those colloidal PSt owing to the additive reinforced by CNTs. The optimum colloidal PSt-CNT content is 1.0 wt.%. The worn surfaces were analyzed using scanning electron microscope. Finally its lubrication mechanism was speculated preliminarily.

Green one-pot preparation of carbon dots (CD)-embedded cellulose transparent film for Fe3+ indicator using ionic liquid

Cellulose ◽  
2020 ◽  
Vol 27 (8) ◽  
pp. 4609-4621 ◽  
Author(s):  
Jeongyeon Woo ◽  
Younghan Song ◽  
Jungbin Ahn ◽  
Hyungsup Kim
Keyword(s):  
Ionic Liquid ◽  
Carbon Dots ◽  
Transparent Film ◽  
One Pot

1, 1’-Sulfinyldiethylammonium Bis (Hydrogen Sulfate) as a Recyclable Dicationic Ionic Liquid Catalyst for the Efficient Solvent-free Synthesis of 3, 4-Dihydropyrimidin-2(1H)-ones via Biginelli Reaction

2020 ◽  
Vol 23 (2) ◽  
pp. 157-167
Author(s):  
Zainab Ehsani-Nasab ◽  
Ali Ezabadi
Keyword(s):  
Ionic Liquid ◽  
Biginelli Reaction ◽  
Aromatic Aldehydes ◽  
Solvent Free ◽  
Hydrogen Sulfate ◽  
One Pot ◽  
Acidic Ionic Liquid ◽  
Brønsted Acidic Ionic Liquid ◽  
Solvent Free Conditions ◽  
Dicationic Ionic Liquid

Objective: A facile and efficient method for synthesis of 3, 4-dihydropyrimidin-2(1H)-ones via Biginelli reaction catalyzed by a novel dicationic Brönsted acidic ionic liquid, [(EtNH2)2SO][HSO4]2, has been successfully developed. Material and Method:: 3, 4-Dihydropyrimidin-2(1H)-ones were synthesized through one-pot condensation of aromatic aldehydes, ethyl acetoacetate, and urea under solvent-free conditions using [(EtNH2)2SO][HSO4]2 as a novel catalyst. The progress of the reaction was monitored by thin-layer chromatography (ethyl acetate / n-hexane = 1 / 5). The products have been characterized by IR, 1H NMR, 13C NMR, and also by their melting points. Results: In this research, a library of dihydropyrimidinone derivatives was synthesized via Biginelli reaction under solvent-free conditions at 120oC using [(EtNH2)2SO][HSO4]2 as a catalyst. Various aromatic aldehydes, as well as heteroaromatic aldehydes, were employed, affording good to high yields of the corresponding products and illustrating the substrate generality of the present method. In addition, the prepared dicationic Brönsted acidic ionic liquid can be easily recovered and reused. Conclusion: 1, 1’-Sulfinyldiethylammonium bis (hydrogen sulfate), as a novel dicationic ionic liquid, can act as a highly efficient catalyst for the synthesis of 3, 4-dihydropyrimidin-2(1H)-ones under solvent-free conditions.

Synthesis, Characterization and Application of N,N-Dimethyl-N-Sulfoethan Ammonium tetra-Chloro Aluminate: A Novel micro-Heterogeneous Cata-lyst for Synthesis of tri-Arylmethanes

2020 ◽  
Vol 17 ◽  
Author(s):  
Saeid Azimi ◽  
Niloofar Mohamadighader
Keyword(s):  
Ionic Liquid ◽  
Heterogeneous Catalyst ◽  
Mass Spectroscopy ◽  
Aromatic Aldehydes ◽  
Solid Catalyst ◽  
Sem Images ◽  
One Pot ◽  
Acidic Catalyst ◽  
Eds Analysis ◽  
Ft Ir

Abstract: A new solid catalyst was synthesized from an ionic liquid and heterogenised by changing anion reaction. The new heterogeneous acidic catalyst was characterized by SEM images, EDS analysis, AFM images, Ft-IR, HNMR, 13CNMR and Mass Spectroscopy. It was applied to synthesis of tri-arylmethanes throughout one-pot tri-component reactions among aromatic aldehydes, N,N-dimethylaniline and other carbonic nucleophiles such as anisole and indole. Hence, synthesis of convenient and inexpensive micro-heterogeneous catalyst was introduced, the efficiency of which was confirmed. Also, various useful products were synthesized throughout this simple and clean procedure.

scholarly journals Synthesis of tetrazolo[1,5-a]pyrimidine-6-carbonitriles using HMTA-BAIL@MIL-101(Cr) as a superior heterogeneous catalyst

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Mohammad Hossein Abdollahi-Basir ◽  
Boshra Mirhosseini-Eshkevari ◽  
Farzad Zamani ◽  
Mohammad Ali Ghasemzadeh
Keyword(s):  
Ionic Liquid ◽  
Catalytic Activity ◽  
Reaction Time ◽  
Metal Organic Framework ◽  
One Pot ◽  
Short Reaction Time ◽  
Three Component Reaction ◽  
Metal Organic ◽  
Ft Ir ◽  
Novel Catalyst

AbstractA one-pot three component reaction of benzaldehydes, 1H-tetrazole-5-amine, and 3-cyanoacetyl indole in the presence of a new hexamethylenetetramine-based ionic liquid/MIL-101(Cr) metal–organic framework as a recyclable catalyst was explored. This novel catalyst, which was fully characterized by XRD, FE-SEM, EDX, FT-IR, TGA, BET, and TEM exhibited outstanding catalytic activity for the preparation of a range of pharmaceutically important tetrazolo[1,5-a]pyrimidine-6-carbonitriles with good to excellent yields in short reaction time.

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