Colloidal particles of silicon dioxide for the formation of opal-like structures

Масалов, В. М.; Сухинина, Н. С.; Емельченко, Г. А.

doi:10.1134/s1063783411060229

Cited by 35 publications

(9 citation statements)

References 5 publications

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“…The increase in ammonia concentration leads to the rise of SiO 2 NP size (Fig. 5) that is in agreement with literature data [15]. Evidently in the case of high concentration, ammonia which is the catalyst TEOS hydrolysis reaction simultaneously accelerates the process of of particle growth due to condensation reactions.…”

Section: Fig 2 Sem Micrographs Of Sio 2 Np Obtained In Presence Of supporting

confidence: 90%

Synthesis and Properties of Silica Nanoparticles With Functional Polymer Shell

Shevchuk¹,

Bukartyk²,

Nadashkevych³

et al. 2019

CTAS

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Silica nanoparticles with functional polymer shell based on reactive peroxide-containing copolymers were synthesized via sol-gel method. Unimodal nanoparticles of spherical shell with the size of 190-350 nm and low polydispersity index were obtained. The influence of copolymer nature and concentration, catalyst concentration, onto process kinetics and nanoparticle size was studied. The formation of functional polymeric shell on the surface of silica nanoparticles was proved using the methods of gas-liquid chromatography and complex thermal analysis.

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Section: Fig 2 Sem Micrographs Of Sio 2 Np Obtained In Presence Of supporting

confidence: 90%

Synthesis and Properties of Silica Nanoparticles With Functional Polymer Shell

Shevchuk¹,

Bukartyk²,

Nadashkevych³

et al. 2019

CTAS

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“…brand, as well as distilled water, is commonly accepted in studies of different authors and by means is a bottleneck in the technology. At the same time, the application of TEOS as a key component, and its quality instability, is the main object under consideration in the specialized literature [9]. Traditionally, an increase in the TEOS purity is achieved by its fractional distillation in a rectifying column at atmospheric pressure.…”

Section: Examining Quality Of Materials For the Synthesis Of Photonic mentioning

confidence: 99%

Examining quality of material for the synthesis of photonic crystals by the method of sedimentation analysis

Taranenko

Кayun

Mysov

2017

EEJET

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Досліджено проблему використання тетраетоксисилану різного терміну зберігання при виробництві фотонних кристалів. Синтезовані суспензії досліджені методом седиментационного аналізу. Встановлено, що граничний термін зберігання очищеного тетраетоксисилану становить 96 годин. Перевищення цього терміну призводить до утворення частинок з коефіцієнтом варіації їх діаметра більше 6 %. Останнє неприпустимо в виробництві фотонних кристалів Ключові слова: фотонний кристал, тетраетоксисилан, седиментація, торсіонні ваги, сферичні частинки, метод Штобера Исследована проблема использования тетраэтоксисилана различного срока хранения при производстве фотонных кристаллов. Синтезированные суспензии исследованы методом седиментационного анализа. Установлено, что граничный срок хранения очищенного тетраэтоксисилана составляет 96 часов. Превышение этого срока приводит к образованию частиц с коэффициентом вариации их диаметра более 6 %. Последнее недопустимо в производстве фотонных кристаллов Ключевые слова: фотонный кристалл, тетраэтоксисилан, седиментация, торсионные весы, сферические частицы, метод Штобера

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“…In most cases, the synthesis of silica fillers for composite systems is implemented by the sol-gel method with the use of a catalyst to accelerate the process [17][18][19]. In the process of silica filler production, the base catalyst is most often used due to the fact that it provides the necessary dynamics of the sol-gel system during tetraethoxysilane (TEOS) hydrolysis to form spherical structures of a regular shape [20,21]. In addition to the change in system viscosity (sol-gel transition), the resulting structure of the polycondensation reaction products significantly differs.…”

Section: Introductionmentioning

confidence: 99%

Effect of a Tetraethoxysilane Hydrolysis Reaction Catalyst on the Precipitation of Hydrolysis Products in the Pores of a Polyimide Track Membrane

et al. 2023

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This paper presents the results of obtaining a composite film based on polyimide track membranes filled with a silica filler, although the issue of the deposition of this filler in the pores of the given membranes remained unexplored. The filler was obtained by hydrolysis of tetraethoxysilane using an alkaline and acid catalyst. This paper presents the results of the effect of the tetraethoxysilane hydrolysis reaction catalyst on the precipitation of hydrolysis products in the pores of the polyimide track membrane. The factors influencing the formation of silicon oxide nanofibers within the matrix template (polyimide track membrane) are determined. It was found that the use of an acid catalyst provides the highest rates of filling, while when using an alkaline catalyst, the filling is practically not observed, and only single pores are filled. The properties of the composite film obtained were investigated. SEM images of the surface and chip of the composite while using alkaline and acid catalyst are presented. The spatial structure of composite films based on track membranes was investigated by FTIR spectroscopy. The hydrolysis of tetraethoxysilane in an acid medium significantly decreases the optical density index of the membranes and simultaneously increases their light transmission index. The greatest changes are observed in the range of 500–1000 nm, and there are no detectable changes in the range of 340–500 nm. When using an alkaline catalyst, there is not the same significant decrease in the relative optical density index D.

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Colloidal particles of silicon dioxide for the formation of opal-like structures

Cited by 35 publications

References 5 publications

Synthesis and Properties of Silica Nanoparticles With Functional Polymer Shell

Synthesis and Properties of Silica Nanoparticles With Functional Polymer Shell

Examining quality of material for the synthesis of photonic crystals by the method of sedimentation analysis

Effect of a Tetraethoxysilane Hydrolysis Reaction Catalyst on the Precipitation of Hydrolysis Products in the Pores of a Polyimide Track Membrane

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