Formation of Ordered Crystalline Microstructures of 4-Cyano-4-Octyloxydiphenyl in Borosiloxane Gels

Ermakova, M. V.; Mashchenko, V. I.; Chausova, O. V.; Solomatin, A. S.; Volosnikova, N. I.; Чаусов, Д. Н.

doi:10.18083/lcappl.2019.4.61

Cited by 14 publications

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“…Borosiloxane (BS) is a polymeric material with unique physical properties. It is a characteristics material with needed stickiness [22], self-repair [23,24] and crack resist ones [25]. Therefore, BS can be a used in development of composites with NPs.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of a Novel, Biocompatible and Bacteriostatic Borosiloxane Composition with Silver Oxide Nanoparticles

et al. 2022

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Microbial antibiotic resistance is an important global world health problem. Recently, an interest in nanoparticles (NPs) of silver oxides as compounds with antibacterial potential has significantly increased. From a practical point of view, composites of silver oxide NPs and biocompatible material are of interest. A borosiloxane (BS) can be used as one such material. A composite material combining BS and silver oxide NPs has been synthesized. Composites containing BS have adjustable viscoelastic properties. The silver oxide NPs synthesized by laser ablation have a size of ~65 nm (half-width 60 nm) and an elemental composition of Ag2O. The synthesized material exhibits strong bacteriostatic properties against E. coli at a concentration of nanoparticles of silver oxide more than 0.01%. The bacteriostatic effect depends on the silver oxide NPs concentration in the matrix. The BS/silver oxide NPs have no cytotoxic effect on a eukaryotic cell culture when the concentration of nanoparticles of silver oxide is less than 0.1%. The use of the resulting composite based on BS and silver oxide NPs as a reusable dry disinfectant is due to its low toxicity and bacteriostatic activity and its characteristics are not inferior to the medical alloy nitinol.

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Section: Introductionmentioning

confidence: 99%

Synthesis of a Novel, Biocompatible and Bacteriostatic Borosiloxane Composition with Silver Oxide Nanoparticles

et al. 2022

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“…This assumption is supported by the similarity of the behavior of BS with dilatant dispersions called shear thickening fluids (STFs). Most researchers of STF materials believe that they thicken due to the formation of so-called hydroclusters [32][33][34], which are connected by hydrogen bonds. A number of researchers of BS also associate its dilatant properties with hydrogen bonds [35].…”

Section: Introductionmentioning

confidence: 99%

Novel Biocompatible with Animal Cells Composite Material Based on Organosilicon Polymers and Fullerenes with Light-Induced Bacteriostatic Properties

et al. 2021

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A technology for producing a nanocomposite based on the borsiloxane polymer and chemically unmodified fullerenes has been developed. Nanocomposites containing 0.001, 0.01, and 0.1 wt% fullerene molecules have been created. It has been shown that the nanocomposite with any content of fullerene molecules did not lose the main rheological properties of borsiloxane and is capable of structural self-healing. The resulting nanomaterial is capable of generating reactive oxygen species (ROS) such as hydrogen peroxide and hydroxyl radicals in light. The rate of ROS generation increases with an increase in the concentration of fullerene molecules. In the absence of light, the nanocomposite exhibits antioxidant properties. The severity of antioxidant properties is also associated with the concentration of fullerene molecules in the polymer. It has been shown that the nanocomposite upon exposure to visible light leads to the formation of long-lived reactive protein species, and is also the reason for the appearance of such a key biomarker of oxidative stress as 8-oxoguanine in DNA. The intensity of the process increases with an increase in the concentration of fullerene molecules. In the dark, the polymer exhibits weak protective properties. It was found that under the action of light, the nanocomposite exhibits significant bacteriostatic properties, and the severity of these properties depends on the concentration of fullerene molecules. Moreover, it was found that bacterial cells adhere to the surfaces of the nanocomposite, and the nanocomposite can detach bacterial cells not only from the surfaces, but also from wetted substrates. The ability to capture bacterial cells is primarily associated with the properties of the polymer; they are weakly affected by both visible light and fullerene molecules. The nanocomposite is non-toxic to eukaryotic cells, the surface of the nanocomposite is suitable for eukaryotic cells for colonization. Due to the combination of self-healing properties, low cytotoxicity, and the presence of bacteriostatic properties, the nanocomposite can be used as a reusable dry disinfectant, as well as a material used in prosthetics.

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“…В работе [4] для получения спиральной микроструктуры из одностенных углеродных нанотрубок в центр капли помещали стеклянный шарик. Микроструктурирование соединений, обладающих жидкокристаллическими свойствами, является важной задачей современного материаловедения [14][15][16], поэтому целью данной работы стало исследование формирования спиральных кристаллических микроструктур из 4,4-азоксианизолана и математическое моделирование происходящих процессов.…”

Section: Introductionunclassified

Specific Features of Crystallization Process of 4,4'-Azoxyanisole in the Form of Multiple «Coffee Rings»

Vasilchikova¹,

Konstantinov²,

Mashchenko³

et al. 2020

Liq. Cryst. and their Appl.

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Методами поляризационной оптической микроскопии и гравиметрии исследована кристаллизация 4,4-азоксианизола (Н-4) при испарении растворителя с поверхности капли, расположенной на стеклянной подложке. Показано, что, размещение в центре капли металлического шарика приводит к образованию множественных «кофейных колец», состоящих из микрокристаллов Н-4. Предполагается, что шарик изменяет геометрию исходной капли, что и обусловливает увеличение количества «кофейных колец». Предложена геометрическая модель данного явления, которая хорошо соотносится с экспериментальными данными. Разработанный новый подход к формированию микроструктуры функциональных материалов, обладающих термотропной жидкокристаллической фазой, на стеклянной подложке может найти применение при создании устройств нано-и микроэлектроники, и оптической техники. Ключевые слова: эффект «кофейного кольца», 4,4-азоксианизол, кристаллизация, микроструктурирование.

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Formation of Ordered Crystalline Microstructures of 4-Cyano-4-Octyloxydiphenyl in Borosiloxane Gels

Cited by 14 publications

References 0 publications

Synthesis of a Novel, Biocompatible and Bacteriostatic Borosiloxane Composition with Silver Oxide Nanoparticles

Synthesis of a Novel, Biocompatible and Bacteriostatic Borosiloxane Composition with Silver Oxide Nanoparticles

Novel Biocompatible with Animal Cells Composite Material Based on Organosilicon Polymers and Fullerenes with Light-Induced Bacteriostatic Properties

Specific Features of Crystallization Process of 4,4'-Azoxyanisole in the Form of Multiple «Coffee Rings»

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