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Assessment of tribological properties of native oil obtained from chokeberry seeds with sorbitan trioleate composition as alternative lubricating substance




Key words:

base oils, motion resistances, wear, chokeberry seed oil, oils obtained under supercritical CO2 conditions


The paper presents an assesment of tribological properties of the alternative lubricating composition based on waste chokeberry seed oil obtained by extraction with the presence of supercritical carbon dioxide and sorbitan trioleate as active addition. Lubricating compositions containing concentrations: 1, 2, 3, 4, 5% wt. of the additive on the basis of current literature and own research were prepared. The effects of sorbitan trioleate concentration on movement resistance and wear and anti-seizure properties of the obtained lubricants were analyzed. Two types of tests: seizure tests, with linear load increment and at constant load (T02 four-ball-tester device) were carried out. The obtained test results were related to the results obtained for the rapeseed oil. After tribological tests, the topography of steel ball surfaces subjected to friction was analyzed using an optical profilometer with a 3D matrix. It was shown that in constant load tests, the proposed plant bases are characterized by greater ability to reduce movement resistance and wear than in the case of base chokeberry seed oil and rapeseed oil. On the other hand, it was shown that the compositions containing 4 and 5 %wt. of sorbitan trioleate addition were characterized by the most beneficial anti-seizure properties.



Kazimierz Pulaski University of Technology and Humanities in Radom Faculty of Chemical Engineering and Commodity Science Department of  Commodity Science and Quality Sciences




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