University of Bucharest, Romania
Scientific Tracks Abstracts: J Chromatogr Sep Tech
The main objective of a lubricant is to reduce frection an wear. But also, it is responsible for heat evacuation. Taking into account their nature, there are mineral, synthetical, vegetal or animal lubricants. Untill the XIX-th century, the manufacturing process of lubricants has been based on vegetal and animal recources. In southern country, the olive and corn poppyoils were used meanwhile in northern country the rapeseed oil was used. These oils have a high degree of biodegradability even today. But when the mankind has discovered that oil could be processed for having lubricants and fuels at acceptable costs, the importance of vegetal resources had been reduced, but these petroleum-based lubricants has a strogly negative impact on the environment. This proposes three relationships of dynamic viscosity temperature dependence for olive oil. The purpose of this study was to find a polynomial or exponential dependence between temperature and dynamic viscosity of olive oil, using the Andrade equation changes. Equation constants A, B, C and D were determined by fitting polynomial or exponential. Thousands of years, this oil was used for cooking, cosmetics and soap, but also as fuel for lamps. This proposes the relationship to describe the dependence of the dynamic viscosity of a olive oil, on the temperature. Experimental data for one type of olive oil were used to calculate the accuracy the proposed models. Equation constants were determined by exponential or polynomial beast curves obtained at different shear rates using the program Origin 6.0. The correlation coefficients thus obtained varied between 0.8754 and 0.9999.
Dr. Ioana Stanciu is a teacher of chemistry and physics in middle school. She graduated from the Faculty of Chemistry of the University of Bucharest in 1998. Studies Master they made in the same college and they have completed in 2001. She obtained a Ph.D. in chemistry in 2008 after 6 years of research stage, in which we obtained multi-grade oils based on synthetic polymers. Since 2005 has participated in numerous national and international conferences, has papers publishing in journals national and international for study multi-grade oils, canola oils and sunflower oil. She continued the research by studying oils and get new rheological models describing their behavior.