Syntheses of Silver Nanoparticles in the Matrices of Block and Graft Copolymers and Polymer‐Inorganic Hybrid in Aqueous Solutions

Fedorchuk, Sergey; Zheltonozhskaya, Tatyana; Gomza, Yu. P.; Nessin, S. D.; Kunitskaya, L. R.; Demchenko, Olga

doi:10.1002/masy.201100098

Macromolecular Symposia

2012

DOI: 10.1002/masy.201100098

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Syntheses of Silver Nanoparticles in the Matrices of Block and Graft Copolymers and Polymer‐Inorganic Hybrid in Aqueous Solutions

Sergey Fedorchuk

Tatyana Zheltonozhskaya

Yu. P. Gomza

et al.

Abstract: In the present work we have synthesized two-component block-and graft copolymers MOPEO-b-PAAm, PAAm-b-PEO-b-PAAm and PVA-g-PAAm comprised methoxypoly(ethylene oxide), poly(ethylene oxide) or poly(vinyl alcohol) and chemically complementary polyacrylamide and also the grafted polymer-inorganic hybrid SiO 2 -g-PAAm based on monodispersed silica nanoparticles. These copolymers we used as special matrices in the process of borohydride reduction of Agþ ions. It was established the influence of chemical nature, mole… Show more

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“…2) [52]. The high affinity of the nitrogen heterocycles in poly(4VP) [52] and the amide groups in polyacrylamide (poly(AAm)) [53] toward silver provides for efficient immobilization of the SN, formed upon the reduction of the Ag + ions in the polymer layer, on the surface of highly-dispersed SiO 2 . Hybrid composites with bactericidal properties may also be obtained upon the hybridization of SN stabilized by polystyrenesulfonic acid with CaCO 3 microparticles [54].…”

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Preparation, Structure, and Properties of Hybrid Polymer Composites Containing Silver Clusters and Nanoparticles

Tolstov

2015

Theor Exp Chem

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The major methods for the preparation of silver-containing polymer composite nanosystems and the formation of their hybrid structure are examined. Special attention is focused on a new class of silver-containing hybrid systems, namely, organic-inorganic coordination polymers, obtained by the self-assembly of silver complexes. The effect of intercomponent interaction on the structure and properties of these hybrid composites was examined.The creation of new improved materials is an important goal of modern chemistry and materials science. Polymer composites with hybrid structure are among such materials and hold interest since they display a combination of properties characteristic for each of the inorganic and organic components [1-3] and, in some cases, unique properties related to the specific nature of their structure [4]. From a modern viewpoint, hybrid organic-inorganic materials are formed by the combination of components, differing in their chemical nature, on a molecular or nano level through formation of chemical bonds ((non)covalent bonds, hydrogen bonding, and donor-acceptor bonds) or weaker physical bonds (van der Waals and electrostatic interactions) [5]. Special attention is given to the stability of the nanodispersed components due to interaction between the nanophase and various stabilizers [6]. The interest in silver-containing hybrid polymer composite materials, including nanocomposites, which, by their very nature, are a priori hybrid systems, is attributed to a set of properties of the matrix itself, which often possesses hybrid structure, properties of silver in ionic and nanodispersed forms, and new properties related to the appearance of hybrid silver-polymer structures [7,8]. Special interest is presently found in bionanocomposites derived from biopolymers and silver nanoparticles (SN), which display specific physicochemical properties, in particular, electrochemical, photochemical, and catalytic properties highly dependent on the dimensions and polydispersion of the nanophase [9, 10] as well as biological activity due to the ionization of the metal atoms in the presence of H 2 O/O 2 and the interaction between the SN surface and functional groups of the various biomolecules [11].In light of the important role of the polymer matrix in formation of the major structural characteristics and properties of silver-containing hybrid systems, we should classify these materials according to their chemical structure.Composites with Silver Nanoparticles (SN) Dispersed in a Polymer Matrix with Hybrid Structure. The major distinguishing feature of such materials is the prior synthesis of the hybrid polymer matrix obtained due to the formation of chemical bonds between the organic and inorganic components with subsequent introduction of SN into the system. The synthesis of the SN may be either in situ or ex situ. 740040-5760/15/5102-0074

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Preparation, Structure, and Properties of Hybrid Polymer Composites Containing Silver Clusters and Nanoparticles

Tolstov

2015

Theor Exp Chem

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The process of nickel nanoparticle formation in hydrophilic polymer/inorganic matrices

Zheltonozhskaya

Permyakova

Fomenko

et al. 2021

Molecular Crystals and Liquid Crystals

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Formation of Nickel Nanoparticles in Solutions of a Hydrophilic Graft Copolymer

Zheltonozhskaya¹,

Permyakova²,

Fomenko³

et al. 2021

Polim. z.

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A graft copolymer of poly(vinyl alcohol) and polyacrylamide (PVA-g-PAAm) with interacting main and grafted chains was synthesized by radical matrix polymerization of PAAm from the PVA backbone in an aqueous medium. Its basic molecular parameters including the number and length (molecular weight) of grafts were determined using elemental analysis, DTGA and viscometry. The copolymer macromolecules formed special monomolecular micelles of elipsoidal shape and length ~18-64 nm in aqueous solutions due to the formation of intramolecular polycomplexes between the main and grafted chains. This copolymer was used as a hydrophilic matrix for the in situ synthesis of nickel nanoparticles (NiNPs) in aqueous solutions.On the basis of UV-Vis spectroscopy, an original and simple method for monitoring the kinetics of the formation and yield of metal nanoparticles in systems in which a surface plasmon resonance band does not appear has been proposed and implemented. Using this approach, the kinetics of borohydride reduction of Ni-salt to NiNPs in pure water and PVA-g-PAAm solutions was studied depending on the concentrations of Ni-salt and copolymer matrices. An increase in the initial rate of accumulation and yield of NiNPs with an increase in the concentration of Ni-salt and a decrease in both parameters in copolymer solutions in comparison with pure water was established. At the same time, the accumulation rate and NiNP yield in a complex way was depended on the matrix concentration that was determined by the ratio of such factors as a decrease in the diffusion rate of NaBH4 molecules in copolymer solutions and the accumulation of Ni2+-ions in matrix particles due to complexation with active chemical groups at the first stage of reduction process. The morphology and main structural elements of the NiNPs/PVA-g-PAAm composition were revealed using TEM. It was shown that the in situ synthesis of NiNPs in copolymer matrices was accompanied by the “detachment” of PAAm grafts from the main PVA chains and led to the appearance of two new structures, such as “hairy coils” and “hairy rods”, containing small spherical NiNPs (d~0,5–12,0 nm) in isolated and chain states, respectively. The appearance of the latter structures was explained by the formation of coordination complexes of Ni2+-ions with active groups of both PVA and PAAm chains at the first stage of the reduction reaction.

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Syntheses of Silver Nanoparticles in the Matrices of Block and Graft Copolymers and Polymer‐Inorganic Hybrid in Aqueous Solutions

Cited by 5 publications

References 36 publications

Preparation, Structure, and Properties of Hybrid Polymer Composites Containing Silver Clusters and Nanoparticles

Preparation, Structure, and Properties of Hybrid Polymer Composites Containing Silver Clusters and Nanoparticles

The process of nickel nanoparticle formation in hydrophilic polymer/inorganic matrices

Formation of Nickel Nanoparticles in Solutions of a Hydrophilic Graft Copolymer

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