Nanocomposites based on interpolyelectrolyte complex and Cu/Cu2O core–shell nanoparticles: Structure, thermomechanical and electric properties

Demchenko, V.; Shtompel, V. І.; Riabov, S.V.

doi:10.1016/j.eurpolymj.2016.01.004

Cited by 27 publications

(6 citation statements)

References 18 publications

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“…Within the last decades, interest in studying of nanodimensional particles of various metals is constantly grown 1,2 . First of all, it is explained by their unique optical, electronic, catalytic and other properties, which sharply distinguish them from their analogs -microscale objects.…”

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confidence: 99%

Effect of the type of reducing agents of silver ions in interpolyelectrolyte-metal complexes on the structure, morphology and properties of silver-containing nanocomposites

Demchenko

Riabov

Kobylinskyi

et al. 2020

Sci Rep

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The objective of this work is to study the peculiarities of structural organization, morphology, thermomechanical, electrical and antimicrobial properties of nanocomposites based on pectinpolyethyleneimine interpolyelectrolyte complexes and silver nanoparticles in dependence on the type of reducing agent being applied for chemical reduction of silver ions in the interpolyelectrolyte-metal complexes. The average size of Ag nanoparticles is shown to be increased with decreasing of the activity of reducing agent (E 0 ) and equals to 3.8 nm, 4.3 nm, and 15.8 nm, respectively, when engaging sodium borohydride (-1.24 V), hydrazine (-1.15 V) and ascorbic acid (-0.35 V). Moreover, it was found that the crystallite size of Ag nanoparticles also had the smallest value for nanocomposites obtained involving NaBH 4 as reducing agent. Ag-containing nanocomposites prepared by reduction of silver ions in interpolyelectrolyte-metal complexes while applying a range of reducing agents are characterized by different electrical properties and polymer matrix' glass transition temperature. The influence of silver nanoparticles' size incorporated in the polymer matrix on the antimicrobial activity of nanocomposites has been established. The inhibition zone diameter of Staphylococcus aureus and Escherichia coli was higher for nanocomposites obtained using sodium borohydride and hydrazine compared to nanocomposites where ascorbic acid was used as the reducing agent.

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confidence: 99%

Effect of the type of reducing agents of silver ions in interpolyelectrolyte-metal complexes on the structure, morphology and properties of silver-containing nanocomposites

Demchenko

Riabov

Kobylinskyi

et al. 2020

Sci Rep

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“…2 , curve 2) in the presence of a low-intensity amorphous halo, which, unlike that for the IPEC, has an angular position at 2 θ m ~21.4°. This diffraction maximum, according to [ 1 ], characterizes the existence of interpolyelectrolyte–metal complexes between the ions (Ag + ) and ligands. Taking into account the angular position of this diffraction peak on the X-ray diffractogram of the IMC, average Bragg distance d between the macromolecular chains of polyelectrolytes coordinated with Ag + ions is found to be 8.0 Å.…”

Section: Resultsmentioning

confidence: 99%

“…During the last decades, the interest in studying of nanosize particles of different metals and their oxides has constantly grown up [ 1 – 4 ]. Primarily, it is due to their unique characteristics, dramatically differing from their analogs—micro-scale size objects.…”

Section: Introductionmentioning

confidence: 99%

X-ray Study of Structural Formation and Thermomechanical Properties of Silver-Containing Polymer Nanocomposites

2017

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The structural organization and thermomechanical properties of nanocomposites prepared from interpolyelectrolyte–metal complex (IMC) involving anionic polyelectrolyte, pectin and AgNO3, and cationic polyelectrolyte, poly(4-vinylpyridine), have been investigated using the methods of wide- and small-angle X-ray scattering and thermomechanical analysis. It is established that chemical reduction of Ag+ ions in the IMC by sodium borohydride results in formation of the nanocomposite based on the “pectin–poly(4-vinylpyridine)” interpolyelectrolyte complex (IPEC) and Ag0 nanoparticles as well. At the same time, the level of nanocomposites’ structural heterogeneity is substantially enhancing, while effective size of the heterogeneity regions decreases. The nanocomposites IPEC–Ag0 prepared are shown much bigger T g value and enhanced ability for deformation than those for IMC.

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“…1, б) присутня велика кількість дифракційних максимумів на фоні уявного аморфного гало з вершиною при 2 m 22,6, які вказують на аморфно-кристалічну структуру цього олігомеру. Проведена оцінка відносного ступеня кристалічности (Х кр ) поліетиленгліколю за методою Метьюза [16]: X кр  Q кр (Q кр Q ам ) -1 100%, де Q крплоща дифракційних максимумів, які характеризують кристалічну структуру полімеру; Q кр Q ам -площа всієї дифрактограми в інтервалі кутів розсіяння (2 1 -2 2 ), в якому проявляється аморфно-кристалічна структура олігомеру, показала, що він становить близько 85%.…”

Section: результати досліджень та їх обговоренняunclassified

Structure and Thermophysical Properties of Polymer Composites Based on Oligomers of Various Molecular Weight

2018

Nanosist. Nanomater. Nanotehnol.

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 2018 ІМÔ (Інститут металофізики ім. Г. В. Êурдюмова ÍÀÍ Óкраїни) Íадруковано в Óкраїні. Ôотокопіювання дозволено тільки відповідно до ліцензії Ключові слова: полімерний композит, епоксидний олігомер, поліетиленгліколь, гетерогенна структура, ступінь кристалічности.

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Nanocomposites based on interpolyelectrolyte complex and Cu/Cu2O core–shell nanoparticles: Structure, thermomechanical and electric properties

Cited by 27 publications

References 18 publications

Effect of the type of reducing agents of silver ions in interpolyelectrolyte-metal complexes on the structure, morphology and properties of silver-containing nanocomposites

Effect of the type of reducing agents of silver ions in interpolyelectrolyte-metal complexes on the structure, morphology and properties of silver-containing nanocomposites

X-ray Study of Structural Formation and Thermomechanical Properties of Silver-Containing Polymer Nanocomposites

Structure and Thermophysical Properties of Polymer Composites Based on Oligomers of Various Molecular Weight

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