Controllable synthesis of 0D, 1D, and 2D nano lanthanum borates and their dispersion stabilities and tribological properties in rapeseed oil

2022 ◽  
pp. 1-10
Author(s):  
Kecheng Gu ◽  
Qiaoyu Gan ◽  
Wang Lin ◽  
Xiuli Zuo ◽  
Junyu Liu ◽  
...  
Keyword(s):  
Tribological Properties ◽  
Rapeseed Oil ◽  
Controllable Synthesis

THE TRIBOLOGICAL PROPERTIES OF LUBRICATING GREASES BASED ON RENEWABLE OILS

Tribologia ◽  
2016 ◽  
Vol 266 (2) ◽  
pp. 61-72
Author(s):  
Rafał KOZDRACH
Keyword(s):  
Disperse Phase ◽  
Vegetable Oils ◽  
Tribological Properties ◽  
Castor Oil ◽  
Rapeseed Oil ◽  
Modified Silica ◽  
Limiting Load ◽  
Antiwear Properties ◽  
Lubricating Properties ◽  
Limiting Pressure

The paper discusses the influence of vegetable oil basis on lubricating properties of their selected compositions. Four vegetable oils were used for production of lubricating greases: rapeseed, sunflower, soybean, and castor, all thickened with modified silica of Aerosil® type. The tribological properties of lubricating greases based on vegetable oils were investigated. On their basis, the most beneficial compositions were selected. The tribological properties of greases were estimated via measurements of limiting load of wear (Goz/40), welding load (Pz), scuffing load (Pt), limiting load of scuffing (Poz), and the limiting pressure of seizure (Poz). Based on the obtained results, it may be concluded that the best antiwear properties were shown by the lubricating compositions based on rapeseed oil, whereas the best antiscuffing properties have compositions using castor oil as a disperse phase.

scholarly journals Alternative rapeseed based oil fluid for hydraulic systems of tractors

2021 ◽  
Vol 37 ◽  
pp. 00030
Author(s):  
Alexander P. Bychenin ◽  
Oleg S. Volodko ◽  
Denis N. Bazhutov
Keyword(s):  
Vegetable Oils ◽  
Tribological Properties ◽  
Rapeseed Oil ◽  
Alternative Fuels ◽  
Working Fluid ◽  
Hydraulic Systems ◽  
Agricultural Machinery ◽  
Laboratory Findings ◽  
Hydraulic Oil ◽  
Mineral Oils

The paper analyzes the main applications of alternative fuels and lubricants in automotive vehicles, considers the possibility of using vegetable oils as a working fluid for hydraulic systems of agricultural machinery. Based on the laboratory findings, it states the ways to improve a lubrication formula based on rapeseed oil. The formula is proven to be optimal if it includes 88.9% rapeseed oil + 3.7% D-11 + 3.2% EFO + 4.197% graphite + 0.003% MS-200A, which is superior in tribological properties to MGE-46V hydraulic oil, and can be recommended for use in hydraulic systems of agricultural machinery as an alternative to mineral oils.

THE EFFECT OF THE BIOCARBON TYPE ON THE TRIBOLOGICAL CHARACTERISTICS OF GREASES MANUFACTURED WITH VEGETABLE AND SYNTHETIC BASE OILS

Tribologia ◽  
2021 ◽  
Vol 294 (6) ◽  
pp. 57-63
Author(s):  
Zbigniew Pawelec ◽  
Jarosław Molenda ◽  
Bernadetta Kaźmierczak
Keyword(s):  
Wheat Straw ◽  
Tribological Properties ◽  
Rapeseed Oil ◽  
Tribological Characteristics ◽  
Synthetic Ester ◽  
Base Oils ◽  
Functional Additives ◽  
Plant Waste ◽  
Flax Straw

The article presents the tribological characteristics of plastic greases in which the dispersing phase was vegetable (rapeseed) oil or synthetic ester oil (Priolube). The lithium stearate was used as a thickener in an amount sufficient to obtain a composition in the second consistency class, and the functional additives were biocarbon produced in the process of pyrolysis of the following plant waste: flax straw, wheat straw, corn leaves and stalks, and cherry stones. The compositions containing 5% m/m of biocarbon were prepared and the influence of the type of biocarbon on the tribological properties of the obtained plastic greases was assessed. The tribological characteristics of the grease compositions were determined using the T-02 tester in accordance with the requirements of the relevant standards. The influence of the applied biocarbon on the anti-wear (Goz) and anti-seize (Pt, poz) properties of plastic greases made with vegetable and synthetic basis was determined. It was found that some of the biocarbon, especially those derived from the pyrolysis of corn waste, significantly improve the tribological properties of plastic greases, both those based on plant and synthetic sources.

scholarly journals RAPESEED OIL VERSUS SOYBEAN OIL – RHEOLOGICAL AND TRIBOLOGICAL PROPERTIES

2017 ◽  
Author(s):  
I. Radulescu ◽  
A.V. Radulescu ◽  
C. Georgescu ◽  
L. Deleanu
Keyword(s):  
Shear Rate ◽  
Soybean Oil ◽  
Tribological Properties ◽  
Rapeseed Oil ◽  
Tribological Behavior ◽  
Test Type ◽  
Tribological Tests ◽  
Test Parameters ◽  
Plate Geometry

The purpose of this paper is a comparison between rapeseed oil and soybean oil, regarding their rheological and tribological properties. Tests were performed on a Brookfield viscometer with cone-plate geometry, having the following test parameters: test type – shear rate imposed, shear rate (100...2000 s–1), temperature values between 20 °C and 75 °C. In parallel, there were proceed tribological tests on a four ball machine, for three speeds (1200, 1500 and 1800 rpm). The results of the tests highlight the better rheologial and tribological behavior of the rapeseed oil, thus it could be recommended in tribological applications.

Study of the effect of overbased calcium or magnesium sulfonate combinated with thiazole derivatives in rapeseed oil on tribological properties

2018 ◽  
Vol 70 (7) ◽  
pp. 1258-1267
Author(s):  
Juan Tan ◽  
Yanfei Wang ◽  
Mouwu Liu ◽  
Jing Liu
Keyword(s):  
Iron Oxides ◽  
Tribological Properties ◽  
Rapeseed Oil ◽  
Single Agent ◽  
Lubricant Film ◽  
Thiazole Derivatives ◽  
Alkyl Benzene ◽  
Alkyl Benzene Sulfonate ◽  
Content Type ◽  
Worn Surfaces

Purpose The purpose of this paper is to study the tribological properties of a thiazole derivatives (T561), overbased alkyl benzene calcium sulfonate (T106A) compounded with T561 and overbased alkyl benzene magnesium sulfonate (T107) compounded with T561 in rapeseed oil (RSO). Design/methodology/approach A four-ball machine was used to evaluate the tribological properties of each compound and their combinations with T561 in RSO. Scanning electron microscopy, EDX and X-ray photoelectron spectroscopy were applied to analyze the tribofilm formed on the worn surfaces. Findings Results of tribotesting demonstrated that synergistic effects exist between the overbased sulfonates, T106A and T107, and the thiazole derivative, T561. The texts of tribofilm indicated that iron sulfide and iron oxides exist in T561 single agent lubricant film and two composite additives lubricant film, and no sulfates were detected. It suggested that the addition of alkyl benzene sulfonate did not hinder the formation of iron sulfides and iron oxides. Meanwhile, CaSO4 (MgSO4) and CaCO3 (MgCO3) were detected on the worn surface of the composite additives, which were not detected on the single agent friction surface. Originality/value A tribofilm mainly contains CaSO4 (MgSO4) and CaCO3 (MgCO3) formed on the worn surfaces, which is responsible for excellent extreme pressure and anti-wear properties of the compound agents because of their high melting point and high shear stress.

Hydrolytic stability and tribological properties of N-containing heterocyclic borate esters as lubricant additives in rapeseed oil

2014 ◽  
Vol 73 ◽  
pp. 101-107 ◽  
Author(s):  
Jianchang Li ◽  
Zhipeng Li ◽  
Tianhui Ren ◽  
Xiangqiong Zeng ◽  
Emeil van der Heide
Keyword(s):  
Tribological Properties ◽  
Rapeseed Oil ◽  
Hydrolytic Stability ◽  
Lubricant Additives ◽  
Borate Esters

Preparation and tribological properties of lanthanum-doped TiO2 nanoparticles in rapeseed oil

2013 ◽  
Vol 31 (6) ◽  
pp. 589-594 ◽  
Author(s):  
Kecheng GU ◽  
Boshui CHEN ◽  
Yong CHEN
Keyword(s):  
Tio2 Nanoparticles ◽  
Tribological Properties ◽  
Rapeseed Oil ◽  
Doped Tio2

Lubrication properties of modified lard and rapeseed oil greases with sodium and lithium thickeners

2015 ◽  
Vol 67 (6) ◽  
pp. 557-563 ◽  
Author(s):  
Juozas Padgurskas ◽  
Raimundas Rukuiža ◽  
Arturas Kupcinskas ◽  
Raimondas Kreivaitis
Keyword(s):  
Wear Resistance ◽  
Tribological Properties ◽  
Rapeseed Oil ◽  
Content Type ◽  
Lithium Soap ◽  
High Thermal Resistance ◽  
Degradable Materials ◽  
Wear Tests ◽  
Lubrication Properties ◽  
Selection Of

Purpose – The purpose of this paper is to conduct research on the possibility of improving the tribological and utilization properties of lard and rapeseed oil bio-based greases by mixing it with ethanol and selection of thickener and modification with special biological additives. Design/methodology/approach – Rapeseed oil- and lard-based greases with sodium and lithium soap thickeners were mixed with either water or ethanol and modified with a special biological anti-wear additive. Tribological properties of modified lubricants evaluated on a four-ball machine. Findings – Rapeseed oil- and lard-based greases suspended in ethanol and modified with bio-additive have the same wear resistance as the industrial non-biological lubrication grease and much higher wear resistance as bio-based reference grease. The tribological efficiency of the additives is higher in greases of rapeseed oil and less efficient in lard-based greases. Oxidation and wear tests show that investigated bio-based greases have comparatively stable tribological properties also after their aging. Modified greases have sufficient consistence according penetration measurements and high thermal resistance according drop-point temperature measurements. All produced experimental greases pass within the category of the easily degradable materials. Originality/value – The greases mixed with the ethanol make possible to form more homogeneous and stable grease mixture. Modified bio-based greases have significantly higher wear resistance as bio-based reference grease, their lubrication properties are stable also after the aging and are categorized as easily degradable materials.

scholarly journals THE INFLUENCE OF OXIDATION ON TRIBOLOGICAL PROPERTIES OF RAPESEED OIL / OKSIDACIJOS ĮTAKA RAPSŲ ALIEJAUS TRIBOLOGINĖMS SAVYBĖMS / ВЛИЯНИЕ ОКСИДАЦИИ РАПСОВОГО МАСЛА НА ЕГО ТРИБОЛОГИЧЕСКИЕ СВОЙСТВА

Transport ◽  
2011 ◽  
Vol 26 (2) ◽  
pp. 121-127 ◽  
Author(s):  
Raimondas Kreivaitis ◽  
Juozas Padgurskas ◽  
Milda Gumbytė ◽  
Violeta Makarevičienė ◽  
Bronislovas Spruogis
Keyword(s):  
Induction Period ◽  
Vegetable Oils ◽  
Tribological Properties ◽  
Rapeseed Oil ◽  
Structural Changes ◽  
Oxidation Stability ◽  
Environmentally Friendly ◽  
Negative Influence ◽  
Hydraulic Systems ◽  
Road Building

Approximately a half of all consumed lubricants, in one or another way, end up in the environment. Some countries put forward recommendations or even requirements for the use of environmentally friendly bio-lubricants the purpose of which is to reduce a negative influence of lubricants. The priority areas of using environmentally friendly lubricants cover water transport, hydraulic systems in forestry machinery, railway applications, road building machines etc. Particularly it is the case when an increased possibility of putting a lubricant in the environment occurs. Regarding good lubricity and excellent biodegradability, vegetable oils are widely used as environmentally friendly lubricants. The biggest disadvantage of vegetable oils as base stock for lubricants is pure oxidation stability. This article deals with the influence of thermal oxidation on tribological properties of rapeseed oil. The obtained results show that oxidation decreases lubrication ability due to structural changes in oil. The greatest negative influence of oxidation is obtained at the end of the induction period. Santrauka Gerai žinomas faktas, jog apie pusė visų šiuo metu naudojamų alyvų vienokiu ar kitokiu būdu patenka į aplinką. Siekiant sumažinti tepamųjų medžiagų neigiamą įtaką aplinkai, tam tikrose srityse rekomenduojama, o kai kuriose šalyse net reikalaujama naudoti aplinkai nekenkiančias biologines tepamąsias medžiagas. Susidaro didesnė galimybė šioms medžiagoms tiesiogiai patekti į aplinką ir prioritetinėmis šių medžiagų naudojimo sritimis yra laikomas vandens transportas, miškų ūkio mašinų hidraulinės sistemos, geležinkelio mechanizmai, kelių tiesimo mašinos ir kt. Dėl gerų tepamųjų savybių ir gero biologinio suirstamumo augaliniai aliejai yra gana plačiai naudojami gaminant aplinkai nekenkiančias alyvas. Didžiausias tokių bazinių tepamųjų medžiagų trūkumas yra palyginti mažas atsparumas oksidacijai. Šiame straipsnyje nagrinėjama rapsų aliejaus oksidacijos įtaka jo tribologinėms savybėms. Gauti rezultatai rodo, jog aliejaus oksidacija dėl jame vykstančių struktūrinių pokyčių padidina trinties nuostolius ir paviršių nusidėvėjimą, didžiausią įtaką šiems parametrams darydama pasibaigus alyvos oksidacijos indukciniam periodui. Резюме Хорошо известен факт, что около половины применяемого масла попадает в окружающую среду. С целью сократить вред, наносимый окружающей среде от этих выбросов, рекомендуется, а в некото рых странах и требуется применение в некоторых областях биологических смазочных материалов. Приоритетными областями для применения этих материалов являются водный транспорт, гидравлические системы машин лесного хозяйства, механизмы железной дороги, машины для строительства дорог и др., т. е. те, в которых имеется повышенная возможность попадания смазочных материалов в окружающую среду. Растительные масла из-за хороших смазочных свойств и быстрого биологического распада широко применяются при производстве биологических масел. Наибольшим недостатком таких базовых масел является их относительно небольшая стойкость к оксидации. В представляемой статье приведены результаты исследований влияния оксидации рапсового масла на его трибологические свойства. Полученные результаты показывают, что оксидация масла из-за происходящих в нем структурных изменений увеличивает потери на трение и изнашивание поверхности, наибольшее влияние проявляется при окончании индукционного периода оксидации масла.

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