Expansion of the arsenal of physical research methods of liquid dielectric examples exotic types of vegetable oils
Research topic: the applicability of an external feature — electret-thermal analysis — to the study of liquid dielectrics, which are exotic types of edible vegetable oils.
The purpose of scientific research: to establish the relationship of the current response with heating of oil samples with their fatty acid composition.
Description of the research methodology: for the analysis of samples of vegetable oils (pumpkin, walnuts, black cumin), the method of electret-thermal analysis, that is widely used in condensed matter physics, was applied. When this method is implemented, during the heating of samples, a current response to the physicochemical changes occurring in them is recorded, which is compared with the fatty acid oils composition.
The main results, conclusions of the research work: based on the existence of a non-zero current response, a hypothesis is put forward that thermally stimulated and accompanied by the flow of current destruction of unstable supramolecular formations — associates of fatty acid triglycerides — occur in the samples. It has been established that the spectrum type of the thermally stimulated current is in obvious accordance with the fact which triglycerides of which specific fatty acids prevail in the composition of a particular oil. A change in the current spectrum in comparison with the characteristic spectrum for this oil type can be considered a marker of damage or falsification.