Structure of Polyglycols Doped by Nanoparticles with Anisotropic Shape

Lysenkov, Е.А.; Melnyk, I.A.; Bulavin, L. A.; Klepko, V.V.; Lebovka, Nikolaï

doi:10.1007/978-3-319-20875-6_7

Cited by 15 publications

(12 citation statements)

References 65 publications

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“…It evidenced that CTAB can successfully penetrate into the Lap interlayer's. [2] The effects of competitive adsorption of PEO (M w = 400-20000)and CTAB on surface of Lap platelets on electrokinetic behavior have been also investigated. [124] The concentration of Lap was C Lap = 0.065 % and 2 %.…”

Section: Electrokinetic Propertiesmentioning

confidence: 99%

“…Different properties of individual Lap, PEO substances and Lap/PEO composites have been widely studied and reviewed. [1][2][3][4][5][6] These materials have many perspectives for practical applications in rechargeable batteries, fuel cells, and different engineering fields. Moreover, they have low cost, low toxicity, high biocompatibility and may be used in medicine, pharmacy, and drug-delivery systems.…”

Section: Introductionmentioning

confidence: 99%

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Physico‐Chemical Properties of Laponite®/Polyethylene‐oxide Based Composites

Lysenkov

Klepko

Bulavin

et al. 2023

The Chemical Record

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This review aims to provide a literature overview as well as the authors’ personal account to the studies of Laponite® (Lap)/Polyethylene‐oxide (PEO) based composite materials and their applications. These composites can be prepared over a wide range of their mutual concentrations, they are highly water soluble, and have many useful physico‐chemical properties. To the readers’ convenience, the contents are subdivided into different sections, related with consideration of PEO properties and its solubility in water, behavior of Lap systems(structure of Lap‐platelets, properties of aqueous dispersions of Lap and aging effects in them), analyzing ofproperties LAP/PEO systems, Lap platelets‐PEO interactions, adsorption mechanisms, aging effects, aggregation and electrokinetic properties. The different applications of Lap/PEO composites are reviewed. These applications include Lap/PEO based electrolytes for lithium polymer batteries, electrospun nanofibers, environmental, biomedical and biotechnology engineering. Both Lap and PEO are highly biocompatible with living systems and they are non‐toxic, non‐yellowing, and non‐inflammable. Medical applications of Lap/PEO composites in bio‐sensing, tissue engineering, drug delivery, cell proliferation, and wound dressings are also discussed.

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Section: Electrokinetic Propertiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Physico‐Chemical Properties of Laponite®/Polyethylene‐oxide Based Composites

Lysenkov

Klepko

Bulavin

et al. 2023

The Chemical Record

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“…Протягом останніх років нанокомпозитні матеріали на основі вуглецевих нанотрубок (ВНТ) привертають до себе велику увагу дослідників завдяки унікальним властивостям, а також широким перспективам їх практичного застосування [6][7]. Свої унікальні електричні та термодинамічні властивості дані нанокомпозити набувають завдяки утворенню перколяційних кластерів з ВНТ у діелектричному середовищі, причому у більшості випадках поріг перколяції спостерігалося вже при надзвичайно малих концентраціях ВНТ [8].…”

Section: вступunclassified

“…Багатошарові ВНТ виробництва «ТМ Спецмаш» (Україна) виготовлені методом CVD (хімічне о садження парів) при вмісті мінеральних домішок 0,1%. Питома поверхня -190 м 2 /г, зовнішній діаметр -20 нм, довжина (5÷10) мкм [7]. Питома електропровідність σ спресованих ВНТ (за тиску 15 ТПа) вздовж осі 4 вуглецевих нанотрубок.…”

Section: рис 2 реакція стадії зшивання форполімеру тмп з утвореннямunclassified

Piezoresistive Behavior of the Systems Based on Cross-Linked Polyurethanes and Carbon Nanotubes

Lysenkov¹,

Lobko²,

Gagolkina³

et al. 2016

SEMST

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Використовуючи метод імпедансної спектроскопії проведено дослідження особливостей електропровідності систем на основі сітчастих поліуретанів та вуглецевих нанотрубок в залежності від величини зовнішнього тиску. Встановлено, що залежність електропровідності від тиску проявляє перколяційну поведінку. Виявлено механізми нелінійної зміни електропровідності зі зростанням тиску. Показано, що досліджувані системи є перспективними п'єзорезистивними матеріалами для створення сенсорів тиску.

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“…Питома поверхня -190 м 2 /г, зовнішній діаметр -20 нм, довжина (5÷10) мкм, аспектне відношення L/d ≈ 250 ± 170 (рис. 1)[8]. Густина ВНТ дорівнює густині чистого графіту і становить ρ = 2045 кг/м 3 .…”

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Influence of Noncovalent Modification of Carbon Nanotubes by Polyethylene Glycol on Their Distribution in the Polymer Matrix

Lysenkov¹,

HYLKO²,

BILA³

2022

Proc. Shevchenko Sci. Soc. Chem. Sci.

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In polymer nanocomposites filled with carbon nanotubes, it is very difficult to ensure uniform distribution of nanotubes in the polymer matrix, as well as the stability of this dispersion over time. Therefore, in such systems, over time, due to the strong van der Waals forces of attraction between individual nanotubes, aggregation of filler particles takes place. It leads to a transition from the nano to the micro level of their structural organization. This transition significantly affects the complex of functional properties of polymer nanocomposites filled with carbon nanotubes (CNTs). Therefore, the development of new approaches to the stabilization of nanoparticles in order to prevent their aggregation to create nanocomposite materials with improved functional characteristics is an actual task. The work is devoted to the study of the influence of non-covalent modification of carbon nanotubes on the degree of their distribution in the polymer matrix of polyethylene glycol. The peculiarities of CNT distribution of two types were studied: unmodified and non-covalently modified nanotubes. It was found that unmodified CNTs contained hydroxyl, carboxyl and lactone groups on the surface. The presence of these groups on the surface of CNTs allowed for their noncovalent modification. The analysis of microscopic images revealed that the modified CNTs are more evenly distributed in the polymer matrix than the unmodified nanotubes, which can be explained by the different nature of the interaction between the polymer matrix and the CNT. It is shown that for systems containing modified CNTs, a higher value of fractal dimension is observed, which indicates the formation of more fluffy aggregates with CNTs, while unmodified CNTs tend to form denser aggregates. Modification of CNTs with PEG is a promising method to increase the degree of distribution of nanotubes in the polymer matrix, which will significantly improve the properties of such nanocomposite materials.

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Structure of Polyglycols Doped by Nanoparticles with Anisotropic Shape

Cited by 15 publications

References 65 publications

Physico‐Chemical Properties of Laponite®/Polyethylene‐oxide Based Composites

Physico‐Chemical Properties of Laponite®/Polyethylene‐oxide Based Composites

Piezoresistive Behavior of the Systems Based on Cross-Linked Polyurethanes and Carbon Nanotubes

Influence of Noncovalent Modification of Carbon Nanotubes by Polyethylene Glycol on Their Distribution in the Polymer Matrix

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