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.

scholarly journals Tribological Behavior of Hydraulic Oils Under Different Motion Modes

2021 ◽  
Vol 233 ◽  
pp. 04021
Author(s):  
An Haizhen ◽  
Chen Li ◽  
Zhen Penghou ◽  
Liu Min
Keyword(s):  
Tribological Properties ◽  
Hydraulic System ◽  
Tribological Behavior ◽  
Test Methods ◽  
Lubricating Oil ◽  
Extreme Pressure ◽  
Wear Performance ◽  
Motion Modes ◽  
Test Parameters ◽  
Selection Of

In order to study the tribological properties of different hydraulic oils under different motion modes, four-ball tester and block-on-ring tester were used to optimize the test parameters and evaluate performance of commercial hydraulic oils. The results showed that the optimized test methods under the form of point and line motion modes can better evaluate the extreme pressure and anti-wear performance of hydraulic oi. There was a negatively correlation between extreme pressure and anti-wear performance; this method can provide a basis for the reasonable selection of lubricating oil in hydraulic system.

scholarly journals INFLUENCE OF MANUFACTURING METHODS ON THE TRIBOLOGICAL PROPERTIES OF RAPESEED OIL LUBRICANTS

Transport ◽  
2015 ◽  
Vol 31 (1) ◽  
pp. 56-62 ◽  
Author(s):  
Juozas Padgurskas ◽  
Raimundas Rukuiža ◽  
Algirdas Meškinis ◽  
Raimondas Kreivaitis ◽  
Bronislovas Spruogis
Keyword(s):  
Wear Resistance ◽  
Chemical Analysis ◽  
Tribological Properties ◽  
Rapeseed Oil ◽  
Efficient Operation ◽  
Refined Oil ◽  
Tribological Tests ◽  
Manufacturing Methods ◽  
Oil Refinement ◽  
Oil Modification

Tribological properties of rapeseed oils manufactured and processed by different methods and modified by the anti-wear additives were analysed. Tribological tests presented that unrefined rapeseed oil has better wear resistance compared to refined oil. Modification of rapeseed oil with 2% of special biological anti-wear additives has the greatest influence on refined rapeseed oil. Chemical analysis shows that refinement removes acids from oil. Refinement and lower acidity allows more efficient operation of special biological anti-wear additives.

scholarly journals Heating of Plant Oils-Fatty Acid Reactions versus Tocopherols Degradation

2009 ◽  
Vol 27 (Special Issue 1) ◽  
pp. S185-S187 ◽  
Author(s):  
Z. Réblová ◽  
D. Tichovská ◽  
M. Doležal
Keyword(s):  
Fatty Acid ◽  
Soybean Oil ◽  
Olive Oil ◽  
Vegetable Oils ◽  
Sunflower Oil ◽  
Rapeseed Oil ◽  
Degradation Rate ◽  
Plant Oils ◽  
Oil Sunflower ◽  
High Degradation Rate

Relationship between polymerised triacylglycerols formation and tocopherols degradation was studied during heating of four commercially accessible vegetable oils (rapeseed oil, classical sunflower oil, soybean oil and olive oil) on the heating plate with temperature 180°C. The content of polymerised triacylglycerols 6% (i.e. half of maximum acceptable content) was achieved after 5.3, 4.2, 4.1, and 2.6 hours of heating for olive oil, soybean oil, rapeseed oil and sunflower oil, respectively, while decrease in content of total tocopherols to 50% of the original content was achieved after 3.4, 1.6, 1.3, and 0.5 hours of heating for soybean oil, rapeseed oil, sunflower oil and olive oil, respectively. Because of the high degradation rate of tocopherols, decrease in content of total tocopherols to 50% of the original content was achieved at content of polymerised triacylglycerols 0.6%, 1.9%, 2.8% and 4.9% for olive oil, rapeseed oil, sunflower oil and soybean oil, respectively, i.e. markedly previous to the frying oil should be replaced.

scholarly journals The tribological properties of Al-brasses in various environments

2017 ◽  
Vol 61 (3) ◽  
pp. 91-94
Author(s):  
M. Lovíšek ◽  
T. Liptáková ◽  
J. Bronček ◽  
S. Dundeková
Keyword(s):  
Tribological Properties ◽  
Room Temperature ◽  
Tribological Behavior ◽  
Cold Drawing ◽  
Operating Conditions ◽  
Air Cooling ◽  
Normal Loading ◽  
Dry Air ◽  
Similar Chemical ◽  
Made In

Abstract Tribological properties of Al-brass pipes of various producers were studied in different environments. The tested brasses have very similar chemical composition, but they differ in microstructure due to mainly by heat treatment after cold drawing. Microstructure as well as roughness of surface influence chemical and mechanical properties which are important in operating conditions. The experiments of tribological behavior were made in various environments, dry air, cooling treated water and 3.5 % solution of NaCl at room temperature 21 ± 2°C. The tribological tests were carried out on the Linear Tribometer at normal loading 5 N by the method ball on plate for the duration of 5500 s. The measured friction coefficients were evaluated by the program DIAdem and the diagrams were created from signal generated by software NSignal Express

Effect of boron-nitrogen modified soybean oil additive on biodegradability, anti-oxidation property, and lubricity of rapeseed oil

2019 ◽  
Vol 234 (2) ◽  
pp. 282-291 ◽  
Author(s):  
Ping Liu ◽  
Xin Wang ◽  
Jiang Wu ◽  
Wang Lin ◽  
Yanhan Feng ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Soybean Oil ◽  
Rapeseed Oil ◽  
Energy Dispersive Spectrometer ◽  
Thermo Gravimetric Analysis ◽  
Gravimetric Analysis ◽  
Modified Soybean Oil ◽  
Wear And Friction ◽  
Friction Reducing ◽  
Boron Nitrogen

Two novel boron-nitrogen modified soybean oil additives with different length of chain structures (abbreviated as BNS1 and BNS2) were synthesized. The thermal stability of BNS1 and BNS2 was evaluated by thermo-gravimetric analysis. The effect of the as-synthesized additives on the biodegradability, anti-oxidation property, and lubricity in rapeseed oil was evaluated by respective standard method. Moreover, the morphology and tribochemical characteristics of the worn surfaces were examined by scanning electron microscope assembled with energy dispersive spectrometer. The results indicated that BNS1 and BNS2 both possess good thermal stability; BNS1 slightly impairs the biodegradability of rapeseed oil, but BNS2 facilitates the biodegradability of rapeseed oil. BNS1 and BNS2 could improve the anti-wear and friction-reducing performance of the rapeseed oil, but BNS1 exhibited better anti-wear ability as compared to that of BNS2, BNS2 exhibited better anti-wear ability in reducing friction coefficients as compared to that of BNS1. The enhanced anti-wear and friction-reducing abilities of rapeseed oil were ascribed to the formation of a composite boundary lubrication film due to the strong adsorption of BNS1 or BNS2 and rapeseed oil onto the lubricated surfaces and their tribochemical reactions with metal surfaces. BNS1 and BNS2 could both facilitate the anti-oxidation properties of the rapeseed oil.

scholarly journals Surface, Subsurface and Tribological Properties of Ti6Al4V Alloy Shot Peened under Different Parameters

Materials ◽  
2020 ◽  
Vol 13 (19) ◽  
pp. 4363
Author(s):  
Yasemin Yıldıran Avcu ◽  
Okan Yetik ◽  
Mert Guney ◽  
Eleftherios Iakovakis ◽  
Tamer Sınmazçelik ◽  
...  
Keyword(s):  
Tribological Properties ◽  
Biomedical Applications ◽  
Sliding Wear ◽  
Tribological Behavior ◽  
Ti6al4v Alloy ◽  
Dry Sliding Wear ◽  
Micro Cracks ◽  
The Coefficient Of Friction ◽  
Mechanical Surface ◽  
Wear Tests

Ti6Al4V alloy was shot peened by using stainless-steel shots with different sizes (0.09–0.14 mm (S10) and 0.7–1.0 mm (S60)) for two durations (5 and 15 min) using a custom-designed peening system. The shot size was the main parameter modifying the roughness (0.74 µm for S10 vs. 2.27 µm for S60), whereas a higher peening time slightly increased roughness. Hardness improved up to approximately 35% by peening with large shots, while peening time was insignificant in hardness improvement. However, longer peening duration with large shots led to an unwanted formation of micro-cracks and delamination on the peened surfaces. After dry sliding wear tests, the mass loss of peened samples (S60 for 15 min) was 25% higher than that of un-peened samples, while the coefficient of friction decreased by 12%. Plastically deformed regions and micro-scratches were observed on the worn surfaces, which corresponds to mostly adhesive and abrasive wear mechanisms. The present study sheds light on how surface, subsurface and tribological properties of Ti6Al4V vary with shot peening and peening parameters, which paves the way for the understanding of the mechanical, surface, and tribological behavior of shot peened Ti6Al4V used in both aerospace and biomedical applications.

scholarly journals Influence of ZnO concentration in rapeseed oil on tribological behavior

2020 ◽  
Vol 724 ◽  
pp. 012045
Author(s):  
T F Ionescu ◽  
D Guglea ◽  
C Georgescu ◽  
D Dima ◽  
L Deleanu
Keyword(s):  
Rapeseed Oil ◽  
Tribological Behavior

THE INFLUENCE OF HIGH AND LOW ERUCIC ACID RAPESEED OILS ON THE PRODUCTIVE PERFORMANCE OF LAYING HENS AND ON THE LIPID FRACTION OF EGG YOLK

1974 ◽  
Vol 54 (3) ◽  
pp. 403-410 ◽  
Author(s):  
H. VOGTMANN ◽  
D. R. CLANDININ ◽  
R. T. HARDIN
Keyword(s):  
Fatty Acids ◽  
Fatty Acid ◽  
Soybean Oil ◽  
Erucic Acid ◽  
Rapeseed Oil ◽  
Fatty Acid Content ◽  
Egg Yolk ◽  
Productive Performance ◽  
Egg Weight ◽  
Low Erucic Acid

The effects of including 5 or 15% of high (regular) and low (Span) erucic acid rapeseed oils or soybean oil on productive performance, total lipid and fatty acid content of egg yolk, and distribution of fatty acids in egg yolk fat were studied. Feed intake varied according to the dietary energy content. However, 15% high erucic acid rapeseed oil decreased feed intake and egg production in comparison with 15% low erucic acid rapeseed oil or soybean oil. Hens receiving rations containing soybean oil produced larger eggs in the treatment than in the pre-treatment period. Five percent regular rapeseed oil in the diet led to a small increase in egg weight, whereas inclusion of 15% regular rapeseed oil in the diet led to a decrease in egg weight. Diets containing the Span oil gave intermediate results. Although the total lipid and total fatty acid content in egg yolk remained constant, the fatty acid composition changed significantly with the experimental diets. The concentration of saturated fatty acids in eggs produced by hens fed diets containing the regular rapeseed oil or low erucic acid rapeseed oil (Span oil) decreased only to a small extent and not in proportion to the amount of these fatty acids present in the diets; but the oleic acid concentration in eggs produced by the hens fed diets containing the rapeseed oil was high. Only 0.2% of erucic acid was found in eggs when 15% regular rapeseed oil was fed to laying hens. The laying hen seems to be able to maintain the level of saturated and monounsaturated fatty acids in yolk lipids in a physiological range. The results indicate that in the laying hen, a partial degradation of erucic acid to gadoleic acid and oleic acid takes place.

GROWTH, CARDIOPATHOLOGY AND CARDIAC FATTY ACIDS OF SWINE FED DIETS CONTAINING SOYBEAN OIL OR LOW ERUCIC ACID RAPESEED OIL

1975 ◽  
Vol 55 (1) ◽  
pp. 49-59 ◽  
Author(s):  
D. W. FRIEND ◽  
J. K. G. KRAMER ◽  
F. D. SAUER ◽  
A. H. CORNER ◽  
K. M. CHARLTON ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Soybean Oil ◽  
Erucic Acid ◽  
Rapeseed Oil ◽  
Mononuclear Cells ◽  
Body Weight Gain ◽  
Methyl Esters ◽  
Control Diet ◽  
Myocardial Necrosis ◽  
Gas Liquid Chromatography

One hundred and eighty weaner pigs were allotted to five dietary treatments comprising a control with no added oil and the control with either soybean oil or rapeseed oil (Brassica campestris cv. Span) each at 10 and 20% of the diet. Postmortem examinations were conducted on equal numbers of boars and gilts at the beginning of the experiment, as initial controls, and after 1, 4 and 16 wk on the experimental diets. When fed for 1 to 4 wk, the higher level of both oils reduced (P < 0.05) body weight gain but from 4 to 16 wk, differences were not significant for any of the diets. Consumption of the control diet exceeded (P < 0.05) that of any other diet, but pigs fed the oil diets showed improved (P < 0.01) feed efficiency. Minute focal interstitial infiltrations of mononuclear cells were present in the myocardium of some pigs in each dietary treatment and also in the initial controls. Foci of overt myocardial necrosis were not seen. Oil red 0 stained sections revealed traces of myocardial fat accumulation which occurred more frequently in pigs fed the high oil diets. In a second experiment, 24 weaner boar pigs were fed the control and the 10% Span oil diets. Two pigs from each treatment were killed on each of days 0, 4, 8, 12, 16 and 20. Total fat was extracted from the heart of each pig and methyl esters determined by gas–liquid chromatography. There was no significant (P = 0.05) difference in percent fat of dry matter between pigs fed the control and the 10% Span diet. The proportions of the major fatty acids were similar between diets. Erucic acid and linolenic acid were present in the cardiac lipid of all control pigs, but to a significantly (P < 0.01) lesser degree than for pigs fed the Span diet. The level of arachidonic acid, for both groups of pigs, declined (P < 0.05) progressively with the duration (days) of feeding.

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