scholarly journals Tribological Properties of Polyester Composites: Effect of Vegetable Oils and Polymer Fibers

Polyester ◽  
10.5772/39230 ◽  
2012 ◽  
Author(s):  
Ibrahim Refaay ◽  
Ali Waheed
Keyword(s):  
Vegetable Oils ◽  
Tribological Properties ◽  
Polymer Fibers ◽  
Polyester Composites

Study of Tribological Properties of Nano-Sized Red Mud Particle-Reinforced Polyester Composites

2019 ◽  
Vol 72 (9) ◽  
pp. 2417-2431 ◽  
Author(s):  
S. Richard ◽  
J. SelwinRajadurai ◽  
V. Manikandan ◽  
M. Chithambara Thanu ◽  
V. Arumugaprabu ◽  
...  
Keyword(s):  
Tribological Properties ◽  
Red Mud ◽  
Polyester Composites

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.

Tribological properties of hydrogen free DLC in self-mated contacts against ZDDP-added oil

2017 ◽  
Vol 69 (6) ◽  
pp. 938-944 ◽  
Author(s):  
Abdul Mannan ◽  
Mohd Faizul Mohd Sabri ◽  
M.A. Kalam ◽  
H.H. Masjuki
Keyword(s):  
Vegetable Oils ◽  
Tribological Properties ◽  
Corn Oil ◽  
Wear Properties ◽  
Low Friction ◽  
Viscosity Change ◽  
Content Type ◽  
Base Oil ◽  
Band Area ◽  
Low Wear

Purpose The purpose of this study is to investigate the tribological properties of tetrahedral diamond-like carbon (DLC) films in self-mated contacts in the presence of additivated and non-additivated vegetable oils. DLC films have high practical value due to low friction and low wear properties. On the other hand, vegetable oils are considered to be lubricants for future due to its resource renewability and biodegradability. Sometimes different chemical agents are added to vegetable oils to further improve its tribological properties. Thus, the tribological study of DLC films against additivated oils becomes important. Design/methodology/approach The tribology tests were conducted in a four ball tribo-meter under the boundary lubricated conditions. Findings Ta-C DLC exhibited 80 per cent lower wear rate under Zinc dialkyldithiophosphates (ZDDP)-added oil compared to that of base oil. In contrast, the friction coefficient under additivated oil was slightly higher than the base oil lubricated case. Moreover, the carbonyl band area as well as the viscosity change of ZDDP-added oil was much smaller than that of base oil. Therefore, ZDDP reduced the wear of DLC film and prevented the oxidation of base oil during tribotests. Originality/value This is the first work on the tribological properties of ta-C DLC lubricated with corn oil with and without anti-wear additives.

Evaluation of physicochemical and tribological properties of chaulmoogra (Hydnocarpus wightianus) oil as green lubricant base stock

2020 ◽  
pp. 135065011989952 ◽  
Author(s):  
S Salaji ◽  
NH Jayadas
Keyword(s):  
Fatty Acids ◽  
Vegetable Oils ◽  
Tribological Properties ◽  
Pour Point ◽  
Edible Oil ◽  
Base Stock ◽  
Resonance Spectroscopy ◽  
Natural Oils ◽  
Lubricant Base Stock ◽  
Cyclic Fatty Acids

Due to environmental concerns, natural oils are increasingly being used as an alternative to mineral oil-based products such as lubricants. However, the use of edible oil for industrial application adversely affects their availability for edible purposes. Chaulmoogra oil is a non-edible oil obtained from the seeds of chaulmoogra tree that grows in wastelands. The fatty acid constituents of vegetable oils determine their properties. Presence of long-chain cyclic fatty acids like chaulmoogric acid, hydnocarpic acid and gorlic acid distinguishes chaulmoogra oil from other oils. Research on how cyclic fatty acids influence the properties of vegetable oils and affect their efficacy as base oils for lubricants is scarce in the literature. This paper presents a preliminary evaluation of the physicochemical, viscometric, oxidative and tribological properties of chaulmoogra oil as a lubricant base stock. Gas chromatography–mass spectroscopy, Fourier transform infrared spectroscopy and nuclear magnetic resonance spectroscopy methods were used for structure elucidation. The viscometric analysis was conducted by using Brookfield viscometer. The tribological performance was evaluated by a four-ball apparatus as per ASTM D4172-94. Thermal and oxidative stabilities were evaluated by thermogravimetric/differential thermal analysis in nitrogen and oxygen environments. Pour point was assessed by ASTM D97 method and differential scanning calorimetry. Chaulmoogra oil has a viscosity of 9.2 cSt at 100 ℃ and a viscosity index of 166. Though the coefficient of friction was better than a commercial lubricant of similar viscosity range (SAE 20W40), the wear scar diameter was comparatively higher. Addition of antiwear additive zinc dialkyl dithiophosphate showed considerable improvement in the wear performance of chaulmoogra oil. Chaulmoogra oil showed a high pour point value around 15 ℃ which needs to be improved by appropriate pour point depressants. Environmental advantage, coupled with non-edible nature of chaulmoogra oil, makes it an excellent base stock for lubricants.

Tribological properties of Cissus quandrangularis stem fiber reinforced isophthalic polyester composites

2020 ◽  
Author(s):  
Santosh Madeva Naik ◽  
Vinod Moger ◽  
Veeranna Gedigeri ◽  
Ajith Kumar ◽  
M. Sreeramulu
Keyword(s):  
Tribological Properties ◽  
Fiber Reinforced ◽  
Polyester Composites

Evaluation of tribological properties of sesame oil as biolubricant with SiO2 nanoparticles and imidazolium-based ionic liquid as hybrid additives

2019 ◽  
Vol 233 (9) ◽  
pp. 1306-1317 ◽  
Author(s):  
S Sabarinath ◽  
PK Rajendrakumar ◽  
K Prabhakaran Nair
Keyword(s):  
Ionic Liquid ◽  
Vegetable Oils ◽  
Tribological Properties ◽  
Density Functional ◽  
Sio2 Nanoparticles ◽  
Intermolecular Forces ◽  
Industrial Applications ◽  
Sesame Oil ◽  
Antiwear Additives ◽  
Copper Strip

The renewability and ecofriendly nature of vegetable oils make them a competitive candidate to replace depleting petroleum-based mineral oils. However, the poor antiwear properties of vegetable oils restrict them from many industrial applications as lubricants. In the present work, the synergic effect of SiO2 nanoparticles with ionic liquids 1-butyl-3- methylimidazolium tetrafluoroborate and 1-hexyl-3-methylimidazolium tetrafluoroborate as hybrid antiwear additives in enhancing the tribological properties of sesame oil is studied for steel on steel contacts. Morphologies of the worn surfaces and possibilities of tribofilm formation are examined using a field-emission scanning electron microscope and energy-dispersive spectroscopy analysis. A density functional theory analysis is performed to study the existence of intermolecular forces of attraction between ionic liquid and triglyceride molecules. Rheological properties of the blends are evaluated using Anton Paar MCR10 rheometer. Corrosive properties of the oil blends are studied using copper strip corrosion test (ASTM D130).

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