Spectroscopic Methods in the Evaluation of Modified Vegetable Base Oils from Crambe abyssinica

Szmatoła, Michał; Chrobak, Justyna; Grabowski, Rafał; Iłowska, Jolanta; Woch, Julia; Szwach, I.; Семенюк, І.; Drabik, J.; Wrona, M.; Kozdrach, R.; Orlińska, Beata; Grymel, Mirosława

doi:10.3390/molecules23123243

Cited by 19 publications

(15 citation statements)

References 37 publications

(36 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The lubricating compositions were developed using nontoxic components to constitute the dispersion and dispersed phases. As a dispersion phase, vegetable oils and mixtures of vegetable and mineral oils with the best tribological and physicochemical properties were used (Drabik et al, 2018b;Iłowska et al, 2018;Szmatoła et al, 2018;Kozdrach, 2020). Abyssinian oil was used as a vegetable oil because it is an inedible oil and has very good physicochemical, tribological, and rheological properties.…”

Section: Materials and Research Methodologymentioning

confidence: 99%

The influence of base oil type on the rheological properties of ecological lubricating greases

Kozdrach¹

2021

Self Cite

View full text Add to dashboard Cite

The article presents the results of research on the influence the type of base oil in lubricating compositions has on the rheological parameters of selected lubricants. Vegetable, mineral, and synthetic dispersion phases were used to produce lubricating greases. The modified amorphous silica was used as the dispersed phase. However, as a modifying additive was used a substance containing the antioxidants, corrosion inhibitors, and EP/AW additives. The experiments on rheological properties were carried out using a Physica MCR 101 rotational rheometer (manufactured by Anton Paar), equipped with a diffusion air bearing and connected to a pneumatic supply – an oil-free Jun-Air compressor and air drying block. The device is equipped with a Peltier system for temperature control in the range of –20°C to 200°C and an external thermostatic VISCOTHERM V2 system, working in the temperature range of –20°C to 200°C. The rheometer control and measurement data analysis were performed using Rheoplus software. The tests were carried out using a cone-plate measuring system with a shear rate range of 0.01–100 s-1 at 20°C for lubricating compositions prepared on various oil bases. To evaluate the value of rheological parameters, the results of tests of the dependence between shear stress and shear rate (flow curves) were used. For the theoretical determined on the flow curves, the following rheological models were used: Bingham, Herschel–Bulkley, Casson, and Tscheuschner. The values of the shear stress (yield point) in depending on the type of dispersion phase has changed. This proves that the use of a base oil with the appropriate functional properties does not weaken, but reinforces the spatial structure of a lubricating grease. It has an important meaning when selecting construction parameters when designing a central lubrication system with grease made from a vegetable oil base (Abyssinian oil). The rheological properties of the lubricating grease are influenced by the type of base oil and thickener, any additives in the grease, the production technology of the grease, and the conditions in which it is used. The tests revealed an important influence of the base oil on the rheological parameters that describe the behaviour of lubricating compositions subjected to stresses and strains in a lubricating system.

show abstract

Section: Materials and Research Methodologymentioning

confidence: 99%

The influence of base oil type on the rheological properties of ecological lubricating greases

Kozdrach¹

2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…The sharper and large peak centered at 1450 cm −1 corresponds to the C=O stretching vibration mode, and the peak at 1610 cm −1 is due to an aromatic C=C stretching mode. In the higher wave-number side, the large peak at the 2700-3100 cm −1 region shows a C-H stretching mode which is indicative of the presence of compounds (CH, CH 2 and CH 3 group) [21,22]. Figure 22 focuses on the first-order (1100-1800 cm −1 ) and the second-order region (2200-3400 cm −1 ) of Raman spectrum measurements.…”

Section: Raman Structural Informationmentioning

confidence: 99%

Optimum Electrical and Dielectric Performance of Multi-Walled Carbon Nanotubes Doped Disposed Transformer Oil

et al. 2020

View full text Add to dashboard Cite

This paper intends to prepare a nanofluid sample by suspending Multi-walled Carbon Nanotubes (MWCNTs) at 0.005g/L concentration and analyze the behavior of electrical and dielectric properties based on the International Electrotechnical Commision test method. In order to validate the effectiveness of MWCNT nanofluid, alternating current breakdown voltage (BDV), negative polarity lightning impulse (LI), dielectric permittivity, dissipation factor (DF), DC resistivity and Raman structural measurement are executed accordingly. In the following, an analysis of the statistical distribution using the two-parameter Weibull distribution law of BDV and LI are evaluated at four experimental conditions to predict the probability of breakdown occurring at different percentages. Based on the observation, the MWCNT filler has a substantial effect in improving the BDV and LI characteristics of disposed mineral oil. The permittivity, DF and resistivity performance of MWCNT nanofluid from 25 °C to 90 °C also produces comparable and reliable performance as a fresh transformer oil. As for Raman structure, the revolution of transformer oil by doping MWCNT does not disrupt the original chemical structure of mineral oil. Hence, this study proves the improvement of the electrical and the behavior of dielectric properties and chemical structure of nanofluid, providing a huge contribution towards the development of insulating materials for transformer application.

show abstract

“…The lubricating grease used in the test was based on a vegetable base oil (Kozdrach, 2016a(Kozdrach, , 2016bDrabik et al, 2018aDrabik et al, , 2018bDrabik et al, , 2018cIłowska et al, 2018;Skowroński, 2018a, 2018b;Szmatoła et al 2018). Lithium stearate was used as a thickener for the lubricating grease.…”

Section: The Characteristics Of the Test Materialsmentioning

confidence: 99%

The influence of montmorillonite content on change the physicochemical properties of lubricating greases produced from vegetable base oil

Kozdrach¹

2020

Self Cite

View full text Add to dashboard Cite

The publication presents the results of investigations into the influence of different amounts of a modifying additive on the physicochemical properties of selected lubricating compositions. Montmorillonite, as a representative of stratified silicates, was used to modify lubricating grease produced from a vegetable base oil, and lithium stearate was used to thicken it. Investigations of the physicochemical properties of the base lubricating grease were carried out and compared with the results obtained for lubricating greases containing the modifying additive. The selected parameters were penetration, penetration after prolonged kneading, dropping point, emission of oil from grease, anticorrosive properties by dynamic method, and mechanical stability-an attempt to roll out and oxidize the lubricant with a PetroOxy apparatus. Based on the results of physicochemical tests, it was determined that the applied modifying additive causes an increase in the dropping point, which limits the applicability of lubricating greases, as well as a decrease in oil emission, which was responsible for the lubricating effectiveness of the tested lubricants. It had a positive effect on mechanical stability and the tested lubricants were not disqualified from use in established applications, reducing the degree of corrosion on ball bearings working in the presence of the lubricating greases during testing. This had a positive effect on the condition of machines and devices where the lubricating greases are used and increased the oxidative stability when its content in the lubricating grease was at least 5%. This figure represents the upper limit of the modifying additive content in the lubricating greases.

show abstract

Spectroscopic Methods in the Evaluation of Modified Vegetable Base Oils from Crambe abyssinica

Cited by 19 publications

References 37 publications

The influence of base oil type on the rheological properties of ecological lubricating greases

The influence of base oil type on the rheological properties of ecological lubricating greases

Optimum Electrical and Dielectric Performance of Multi-Walled Carbon Nanotubes Doped Disposed Transformer Oil

The influence of montmorillonite content on change the physicochemical properties of lubricating greases produced from vegetable base oil

Contact Info

Product

Resources

About