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Оценка агрегативной устойчивости ÐºÐ¾Ð»Ð»Ð¾Ð¸Ð´Ð½Ñ‹Ñ Ñ€Ð°ÑÑ‚Ð²Ð¾Ñ€Ð¾Ð² методом электрофоретического светорассеяния

выпускная квалификационная работа магистра

Оценка агрегативной устойчивости ÐºÐ¾Ð»Ð»Ð¾Ð¸Ð´Ð½Ñ‹Ñ Ñ€Ð°ÑÑ‚Ð²Ð¾Ñ€Ð¾Ð² методом электрофоретического светорассеяния

Abstract

Данная работа посвящена оценке агрегационной устойчивости коллоидных растворов на разработанной лабораторном прототипе анализатора дзета-потенциала, в основе которого лежит метод электрофоретического светорассеяния. Проведен краткий анализ методов получения дзета-потенциала коллоидных частиц обосновывающий выбор метод электрофоретического рассеяния света. Поскольку коммерческие приборы, предназначенные для этой задачи, имеют свои недостатки, задача разработки и совершенствования лабораторного аналога является актуальной. Разработанный измерительный комплекс использует более доступные по стоимости комплектующие и не уступает коммерческой версии по уровню погрешностей. На разработанном приборе проведены тестовые исследования на латексных микросферах разного размера, для проверки работы прибора в случае различных значений функции Генри. Результаты тестовых измерений сравниваются со значениями, полученными для коммерческого прибора Zetasizer Nano. В ходе исследований коллоидных систем различного типа рассчитаны электрофоретическая подвижность и дзета-потенциал, на основе полученных значений последнего сделан вывод об устойчивости исследуемых систем.

This work is devoted to the assessment of the aggregation stability of colloidal solutions on the developed laboratory prototype of the zeta potential analyzer, which is based on the method of electrophoretic light scattering. After a brief analysis of the shortcomings of methods for obtaining the zeta potential of colloidal particles, it is explained why the electrophoretic light scattering method was chosen for this work. Since commercial devices designed for this task also have their drawbacks, the task of developing and improving a laboratory analogue is relevant. For the developed measuring complex, options for improving the signal-to-noise ratio, optimizing the operation of the device, and minimizing errors are proposed. On the developed device, test studies were carried out on differentsized latex microspheres to test the operation of the device in the case of different values of the Henry function. The results of the test measurements are compared with the values obtained for the commercial Zetasizer Nano device. This is necessary to evaluate the measurement accuracy of the created analyzer. For the studied colloidal systems, the electrophoretic mobility and zeta potential are calculated according to the formulas given in the theoretical part, based on the obtained values of the latter, a conclusion is made about the stability of the studied systems.

Keywords

zeta potential, Коллоиды, дзета-потенциал, электрофоретическая подвижность, electrophoretic mobility, Свет, Дисперсные системы

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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