Moringa oil with pristine and fluorinated carbon nanofibers as additives for lubrication

2021 ◽  
pp. 1-26
Author(s):  
Nadiege Nomede-Martyr ◽  
Yves Bercion ◽  
Bilas Philippe ◽  
Marc Dubois ◽  
Henry Joseph ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Ambient Temperature ◽  
Carbon Nanofibers ◽  
Solid Lubricant ◽  
Solid Lubricant Additives ◽  
Adsorption Effect ◽  
Base Oil ◽  
Antiwear Properties ◽  
Fluorinated Carbon ◽  
Moringa Oil

Abstract This paper focuses on the influence of local moringa oil on the performances of lubricants formed from blend of dodecane and pristine or fluorinated carbon nanofibers at ambient temperature. The friction experiments have been evaluated using a reciprocating ball on plane tribometer. Moringa oil is designed to be used as a bio-additives in lubricant formulations. First, the addition of small amounts of moringa oil in dodecance allowed a reduction about 50% of the base oil friction performances. In a second part, a comparative study investigates the friction properties of their blends with pristine carbon nanofibers (CNFs) and fluorinated ones (CF0.85) which are intended to be used as solid lubricant additives. An adsorption effect of fatty acid molecules is showed with CNFs particles unlike CF0.85. Whatever was the percentage of moringa oil added, the more promising results were obtained with CF0.85. Physicochemical characterizations of the tribofilms evidence the good antiwear properties of the lubricants.

scholarly journals Moringa and Graphite as Additives to Conventional Petroleum-Based Lubricants

Lubricants ◽  
2021 ◽  
Vol 9 (7) ◽  
pp. 65
Author(s):  
Nadiège Nomède-Martyr ◽  
Philippe Bilas ◽  
Yves Bercion ◽  
Philippe Thomas
Keyword(s):  
Fatty Acid ◽  
Ambient Temperature ◽  
Vegetable Oil ◽  
Solid Lubricant ◽  
Lubricant Additive ◽  
Adsorption Effect ◽  
Engine Oils ◽  
Graphite Particles ◽  
Antiwear Properties ◽  
Moringa Oil

Many researches are focused on the tribological performances of pure vegetable oil in order to replace the conventional mineral engine oils. This work investigates the influence of local moringa oil (noted VO) on the performances of lubricants formed from a blend of dodecane and graphite particles at ambient temperature. In a first part, a reduction of about 50% of friction properties of dodecane is observed when adding small amounts of moringa oil (VO), which is intended to be used as a bio-base performance additive in lubricant formulations. The friction properties of their blends with graphite, generally employed as solid lubricant additive, showed an adsorption effect of fatty acid molecules. The more promising results were obtained for the blend containing 2 w% of VO. Physicochemical characterizations of the tribofilms evidence the good antiwear properties of the lubricant.

Production of sustainable two-stroke engine biolubricant ester base oil from palm fatty acid distillate

2022 ◽  
Vol 175 ◽  
pp. 114224
Author(s):  
Brandon Ywe Soong Ng ◽  
Hwai Chyuan Ong ◽  
Harrison Lik Nang Lau ◽  
Nor Shafizah Ishak ◽  
Ashraf Elfasakhany ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Base Oil ◽  
Palm Fatty Acid Distillate ◽  
Stroke Engine ◽  
Ester Base ◽  
Fatty Acid Distillate

scholarly journals Tribological behavior of oils additised with a phosphonium-derived ionic liquid compared to a commercial oil

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Marlene Bartolomé Sáez ◽  
Antolin E. Hernández Battez ◽  
Jorge Espina Casado ◽  
José L. Viesca Rodríguez ◽  
Alfonso Fernández-González ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Peer Review ◽  
Formation Rate ◽  
Antiwear Additives ◽  
Stribeck Curve ◽  
Content Type ◽  
Base Oil ◽  
Base Oils ◽  
Antiwear Properties ◽  
Commercial Oil

Purpose The purpose of this paper is to study the antifriction, antiwear and tribolayer formation properties of the trihexyltetradecylphosphonium bis(2,4,4-trimethylpentyl) phosphinate ionic liquid (IL) as additive at 1 wt.% in two base oils and their mixtures, comparing the results with those of a commercial oil. Design/methodology/approach The mixture of the base oils used in the formulation of the commercial oil SAE 0W20 plus the IL was tested under rolling/sliding and reciprocating conditions to determine the so-called Stribeck curve, the tribolayer formation and the antifriction and antiwear behaviors. Findings The use of this IL as additive in these oils does not change their viscosity; improves the antifriction and antiwear properties of the base oils, making equal or outperforming these properties of the SAE 0W20; and the thickness and formation rate of the tribolayer resulting from the IL-surface interaction is highly dependent on the type of base oil and influence on the friction and wear results. Originality/value The use of this IL allows to replace partial or totally commercial antifriction and antiwear additives. Peer review The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-05-2020-0179/

Study on Tribological Properties of Cadmium Dialkyl-Dithiophosphyl-ldithiophosphate Additive

Tribology ◽  
2005 ◽  
Author(s):  
Jianqiang Hu ◽  
Zhanhe Du ◽  
Junbing Yao
Keyword(s):  
Depth Profile ◽  
Tribological Properties ◽  
Auger Electron ◽  
Energy Dispersive ◽  
Electron Spectrometer ◽  
Base Oil ◽  
X Ray ◽  
Load Carrying ◽  
Antiwear Properties ◽  
Analytical Tools

An cadmium dialkyl-dithiophosphyl-dithiophosphate additive was synthesized. A four-ball tester was used to evaluate the tribological performance of the additive in mineral base oil under different loads, compared with commercial additives. The results show that it exhibits excellent antiwear and load-carrying capacities and better than these additives. The surface analytical tools such as Auger Electron Spectrometer (AES), Scanning Electron Microscopy (SEM) with Energy Dispersive X-ray (EDX) were used to investigate the topography, the contents and the depth profile of some typical elements on the rubbing surface of worn scar. Smooth and light topography of worn scar further confirms that the additive showed good antiwear capacities, the results of Auger electron spectrometer and energy dispersive X-ray analysis indicate that tribochemically protective films consists of cadmium compouds, sulfides, sulphates and phosphates were formed on the rubbing surface, which contribute to improving the tribological properties of lubricants. Particularly, the results from depth profile indicate that a large amounts of cadmium are rich in outer layer of surface, which play an important role in improving antiwear properties of oils. Finally, the antiwear mechanism of the additive were proposed.

Enhanced performances in primary lithium batteries of fluorinated carbon nanofibers through static fluorination

2013 ◽  
Vol 114 ◽  
pp. 142-151 ◽  
Author(s):  
Yasser Ahmad ◽  
Katia Guérin ◽  
Marc Dubois ◽  
Wei Zhang ◽  
André Hamwi
Keyword(s):  
Carbon Nanofibers ◽  
Lithium Batteries ◽  
Fluorinated Carbon

Antiwear Properties of Bonded MoS2 Solid Lubricant Coating under Dual-Rotary Fretting Conditions

2016 ◽  
Vol 60 (2) ◽  
pp. 217-225 ◽  
Author(s):  
Ming-xue Shen ◽  
Zhen-bing Cai ◽  
Jin-fang Peng ◽  
Xu-dong Peng ◽  
Min-hao Zhu
Keyword(s):  
Solid Lubricant ◽  
Solid Lubricant Coating ◽  
Lubricant Coating ◽  
Antiwear Properties

Synthesis and oxidative stability of trimethylolpropane fatty acid triester as a biolubricant base oil from waste cooking oil

2014 ◽  
Vol 66 ◽  
pp. 371-378 ◽  
Author(s):  
Erpei Wang ◽  
Xiang Ma ◽  
Shuze Tang ◽  
Rian Yan ◽  
Yong Wang ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Oxidative Stability ◽  
Waste Cooking Oil ◽  
Base Oil ◽  
Cooking Oil

Fatty acid composition of ewe milk as affected by solar radiation and high ambient temperature

2002 ◽  
Vol 69 (2) ◽  
pp. 181-194 ◽  
Author(s):  
AGOSTINO SEVI ◽  
TADDEO ROTUNNO ◽  
ROBERTO DI CATERINA ◽  
ANTONIO MUSCIO
Keyword(s):  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Solar Radiation ◽  
Ambient Temperature ◽  
Acid Composition ◽  
Milk Fat ◽  
Saturated Fatty Acids ◽  
High Ambient Temperature ◽  
Short Chain ◽  
Feeding Time

Forty lactating Comisana ewes were either exposed to or protected from solar radiation and fed either in the morning or afternoon during summer in a Mediterranean climate. Individual milk samples were taken on days 7, 21 and 42 of the study period to determine fatty acid composition by gas chromatography. Exposure to solar radiation resulted in higher proportions of short-chain and saturated fatty acids in milk, primarily because of increased contents of caproic, capric, lauric, myristic and stearic acids (by 3–18%), and decreased contents of oleic, linoleic and linolenic acids (by 2–9%). As a consequence, the long to short chain and the unsaturated to saturated fatty acid ratios were significantly higher by 4 and 13% respectively in the milk of the protected ewes compared with that of the exposed animals. Provision of shade also led to an increase in the 18[ratio ]0+18[ratio ]1 to 16[ratio ]0 ratio, and to a decrease in the 12[ratio ]0+14[ratio ]0+16[ratio ]0 fatty acid group, which are regarded as reliable indexes of the nutritional property of dietary fat in reducing cholesterol levels in human plasma. Feeding time had little impact on milk fat. Our findings suggest that high ambient temperature may markedly modify the lipid composition of ewe milk and that provision of shade, but not feeding management, can improve the milk fatty acid profile in dairy sheep raised in hot climates.

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