Constant Electric and Magnetic Fields Effect on the Structuring and Thermomechanical and Thermophysical Properties of Nanocomposites Formed from Pectin-Cu(2+)-Polyethyleneimine Interpolyelectrolyte-Metal Complexes.

V. Shtompel’,E. Lysenkov,V. Demchenko,S. Riabov

doi:10.1186/s11671-015-1181-z

Abstract

Applying wide-angle X-ray scattering method, thermomechanical analysis, and differential scanning calorimetry, the structural organization and properties of nanocomposites formed by chemical reduction of Сu2+ cations in the interpolyelectrolyte–metal complex (pectin–Cu2+–polyethyleneimine) under the influence of a constant magnetic and electric fields have been studied. It has been found that the chemical reduction of Cu2+ cations in the interpolyelectrolyte–metal complex bulk under constant electric and magnetic fields leads to formation of nanocomposite consisting of interpolyelectrolyte complex, including pectin–polyethyleneimine and nanoparticles of the metal Cu phase, whereas nanocomposite with Cu/Cu2O nanoparticles is formed in original state (without any field). It was observed that, under constant field, nanocomposites obtained have higher structural glass-transition temperatures and thermal stability.

Highlights

In the last decade, considerable attention is paid to the scientific researches dealing with polymer nanocomposites, filled with nanoparticles of different metals or metal oxides [1–3].Metallo-containing compounds can provide polymer materials with special optical, electrical, magnetic, and mechanical properties as well as catalytic activity [4–8]
It was found that the chemical reduction of Cu2+ cations in the interpolyelectrolyte–metal complexes (IMC) bulk with the use of NaBH4 results in interpolyelectrolyte complexes (IPEC) and Cu/Cu2O nanocomposites, and, at the molar ratio BH4 −:Cu2+ = 6, the structure of the Cu metal phase manifests itself completely
Constant electric and magnetic fields impact the structural organization and thermomechanical and thermophysical properties of nanocomposites based on the pectin–polyethyleneimine interpolyelectrolyte complex, and Cu nanoparticles formed from pectin–Cu2+–polyethyleneimine interpolyelectrolyte–metal complexes, involving sodium boron hydride as reducing agent, have been studied

Summary

Introduction

Considerable attention is paid to the scientific researches dealing with polymer nanocomposites, filled with nanoparticles of different metals or metal oxides [1–3].Metallo-containing compounds can provide polymer materials with special optical, electrical, magnetic, and mechanical properties as well as catalytic activity [4–8]. Considerable attention is paid to the scientific researches dealing with polymer nanocomposites, filled with nanoparticles of different metals or metal oxides [1–3]. The current methods of preparing polymer–metal nanocomposites are mainly multistage, for example, the synthesis of metal or metal oxide nanoparticles followed by their introduction into the polymer bulk [2, 3, 18]. (Мen+) in interpolyelectrolyte–metal complexes formed via the introduction of metal salts into an interpolyelectrolyte complex based on two oppositely charged polyelectrolytes [8, 19, 20]. This method allows the preparation of nanocomposites with uniform distributions and controlled nanoparticle sizes in the polymer matrix

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Conclusion