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Диэлектрические свойства Ð¸Ð¾Ð½Ð½Ñ‹Ñ Ð¶Ð¸Ð´ÐºÐ¾ÑÑ‚ÐµÐ¹ в нанотрубкаÑ

выпускная квалификационная работа бакалавра

Диэлектрические свойства Ð¸Ð¾Ð½Ð½Ñ‹Ñ Ð¶Ð¸Ð´ÐºÐ¾ÑÑ‚ÐµÐ¹ в нанотрубкаÑ

Abstract

Были получены нанокомпозитные материалы (НКМ) на основе ионных жидкостей BMIMTFSI, BMIMOTF и BMIMDCA, внедренных в нанотрубки галлуазита и хризотил-асбеста различной длины. Полученные наногели на основе нанотрубок, заполненных ионными жидкостями, обладают высокой ионной проводимостью, что делает такие материалы перспективным для применения в сфере электрохимической энергетики. Исследованы диэлектрические свойства НКМ в температурном диапазоне от 300 K до 420 K на измерительных частотах от 0.1 Гц до 3 МГц. Показано, что увеличение длины нанотрубок приводит к уменьшению диэлектрической проницаемости и проводимости НКМ. Уменьшение объема аниона ИЖ приводит к увеличению диэлектрической проницаемости и проводимости НКМ. Для нелинейной аппроксимации частотных спектров использована прикладная программа ProFit. В результате анализа диэлектрического отклика выявлено три релаксационных процесса в исследованных температурном и частотном диапазонах. Два из них характеризуют релаксационные свойства ИЖ, третий процесс связан с зарядовой поляризацией на границах. Выявлены температуры разложения для некоторых исследуемых НКМ. Проведено сравнение проводимости исследуемых НКМ с исходными ИЖ.

Nanocomposite materials based on ionic liquids: BMIMTFSI, BMIMOTF, BMIMDCA embedded in nanotubes of halloysite, and chrysotile asbestos of various lengths were obtained. Nanogels based on nanotubes filled with ionic liquids have high ionic conductivity, which makes such materials promising for use in the field of electrochemical energy. Dielectric was studied in the temperature range from 300 K to 420 K at frequencies 0.1 Hz to 3 MHz. An increase in the length of the nanotubes leads to a decrease in the permittivity and conductivity. A decrease in the volume of the anion leads to an increase in the permittivity and conductivity. The ProFit application program is used for nonlinear approximation of frequency spectra. As a result of the analysis of the dielectric response, three relaxation processes were revealed in the studied temperature and frequency ranges. Two of them characterize the relaxation properties of the IL, while the other is associated with electrodes polarization. Decomposition temperatures for some of the studied NCM have been revealed. A comparison of the conductivity of the studied NCM with the initial IL was carried out.

Keywords

нанокомпозитные материалы, ionic liquids, галлуазит, ионные жидкости, диэлектрическая проницаемость, nanocomposite materials, Ñ Ñ€Ð¸Ð·Ð¾Ñ‚Ð¸Ð»-асбест, halloysite, chrysotile asbestos, permittivity

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selected citations
These citations are derived from selected sources.
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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