Preparation of polyboronphenylsiloxanes by mechanochemical activation

Капустина, А. А.; Шапкин, Н. П.; Libanov, V. V.

doi:10.1134/s1070363214070123

Cited by 7 publications

(6 citation statements)

References 3 publications

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“…The research strategy is to obtain and isolate the maximum amount of polycalcium organylsiloxanes using the method of mechanochemical activation. The conditions of mechanochemical activation for obtaining different polycalcium organylsiloxanes are optimized and elaborated [ 42 , 43 , 44 , 45 , 46 ]. Due to the friable, permeable structure of the sea urchin skeleton, synthesis is much faster and yields higher yields than with crystalline CaCO 3 or CaO [ 39 ].…”

Section: Methodsmentioning

confidence: 99%

Silica-Containing Biomimetic Composites Based on Sea Urchin Skeleton and Polycalcium Organyl Silsesquioxane

Shapkin,

Khalchenko,

Drozdov

et al. 2023

Biomimetics

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The paper presents an original approach to the synthesis of polycalciumorganyl silsesquioxanes through the reaction of polyorganyl silsesquioxanes [RSiO1.5]n (where R is an ethyl and phenyl radical) with sea urchin skeleton under the conditions of mechanochemical activation. The novelty and practical significance of the present study lies in the use of an available natural raw source as a source of calcium ions to initiate the reaction of calcium silicate formation and create a matrix for the formation of a porous inorganic composite framework. The thermal stability of the introduced silicates, i.e., the ability to maintain a porous structure at high temperatures, is key to the production of an ordered porous material. The reaction scheme was proposed to be based on the interaction of calcium carbonate with the siloxane bond. FTIR, XRD, GPC, and TGA were used to study the composition and structure of the obtained materials. The cross-sectional area of the polymer chain and the volumes of the coherent scattering regions of the polymers obtained were calculated from the XRD data. To prepare the composites, the sea urchin skeleton was further modified with polycalciumorganyl silsesquioxanes in a toluene solution. To remove the sea urchin skeleton, the obtained biomimetic composites were treated with hydrochloric acid. The results of the morphological and surface composition studies are reported. The method proposed in the paper could be of fundamental importance for the possibility of obtaining structured porous composite materials for a wide range of practical applications, including for the purpose of creating a composite that may be a promising carrier for targeted delivery of chemotherapy agents.

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Section: Methodsmentioning

confidence: 99%

Silica-Containing Biomimetic Composites Based on Sea Urchin Skeleton and Polycalcium Organyl Silsesquioxane

Shapkin,

Khalchenko,

Drozdov

et al. 2023

Biomimetics

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“…Thermal analysis was performed using a DTG-60H (Shimadzu) derivatograph in air at the heating rate 10 deg/min (25-1000°С). Gel permea-Scattering intensity, imp/s 2θ, deg tion chromatography analysis was run as described in [17].…”

Section: Methodsmentioning

confidence: 99%

Interaction of polyphenylsiloxane with magnesium acetylacetonate

et al. 2015

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Interaction of polyphenylsiloxane with magnesium acetylacetonate in boiling toluene has been studied. The products isolated via extraction and fractional precipitation have been characterized with elemental analysis, IR spectroscopy, X-ray diffraction analysis, and thermal analysis. The reaction products are polymers containing acetylacetonate group at magnesium atom. Structure of the major product has been suggested.

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“…The obtained experimental data of positron annihilation spectroscopy are shown in Tables 7 and8. To determine the positron and positronium "traps" volume, the technique of [36][37][38] was used, along with the data of Tables 6 and 7.…”

Section: Fareastcon -Materials and Construction IIImentioning

confidence: 99%

Polychelates Based on Magnesium, Aluminum, Iron, Zirconium, and Vanadyl Acetylacetonates - Synthesis, Structure and Properties

Шапкин

Tokar

Gardionov

et al. 2021

KEM

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The formation of polymeric acetylacetonates of magnesium, aluminum, iron, zirconium, and vanadyl under conditions of mechanochemical activation with subsequent condensation in boiling toluene has been investigated. The obtained compounds have been studied by the methods of gel chromatography, X-ray diffractometry, and positron annihilation and IR spectroscopy. Aluminum chelates have been studied by means of NMR spectroscopy. It has been demonstrated that the mechanochemical activation with subsequent boiling in toluene results in the formation of polymeric chelates, mostly those of iron, zirconium and, to a smaller degree, chelates of aluminum, magnesium, and vanadyl. The molecular weight of soluble high-molecular fractions is in the range 3000–5000 Da. The layered polymer structure has been revealed. Cross-section areas of polymer chains and volumes of coherent scattering regions have been calculated from the diffractometry data. The morphology of polymers consisting of spherical particles of sizes in the range 100–700 nm has been investigated. Based on the data of positron annihilation spectroscopy (PAS), density, and nitrogen low-temperature adsorption, the dependence of the chelate stability on the specific polarizing potential has been determined. A fractal structure of solid-state polychelates has been revealed.

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Preparation of polyboronphenylsiloxanes by mechanochemical activation

Cited by 7 publications

References 3 publications

Silica-Containing Biomimetic Composites Based on Sea Urchin Skeleton and Polycalcium Organyl Silsesquioxane

Silica-Containing Biomimetic Composites Based on Sea Urchin Skeleton and Polycalcium Organyl Silsesquioxane

Interaction of polyphenylsiloxane with magnesium acetylacetonate

Polychelates Based on Magnesium, Aluminum, Iron, Zirconium, and Vanadyl Acetylacetonates - Synthesis, Structure and Properties

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