X-ray study of structural formation, thermomechanical and antimicrobial properties of copper-containing polymer nanocomposites obtained by the thermal reduction method. (November 2017)

• Record Type: Journal Article
• Authors: Demchenko, V.; Riabov, S.; Rybalchenko, N.; Goncharenko, L.; Kobylinskyi, S.; Shtompel', V.
• Is Part Of: European polymer journal. Volume 96(2017)
• Page Start: 326
• Page End: 336
• Publication Date: 2017-11
• Subjects: Interpolyelectrolyte complexes -- Interpolyelectrolyte–metal complexes -- Nanocomposite -- Structure -- Thermomechanical properties -- Antimicrobial activity; Polymers -- Periodicals; Polymerization -- Periodicals; Polymères -- Périodiques; Polymérisation -- Périodiques; Polymerization; Polymers; Periodicals; Electronic journals; 547.705
• DOI: 10.1016/j.eurpolymj.2017.08.057
• Languages: English
• ISSNs: 0014-3057

Abstract

Graphical abstract: Highlights: With the use of wide- and small-angle X-ray scattering, it has been shown that temperature for preparing of nanocomposite based on pectin, polyethyleneimine and Cu nanoparticles, obtained by the thermal reduction of copper ions, proved to be 170 °C and higher temperatures. In its turn, thermal reduction of copper ions is found out to take place owing to polyethyleneimine (namely, due to electrons transfer from the nitrogen atoms of amino groups of polyethyleneimine to Cu 2+ ions). The antimicrobial investigations of the nanocomposites elaborated, revealed they possess a antimicrobial activity against S. aureus and E. coli strains. Abstract: Structural organization, morphology and thermomechanical properties of nanocomposites based on pectin, polyethyleneimine and Cu nanoparticles, formed by the thermal reduction method from interpolyelectrolyte–metal complexes (IMC) pectin–Cu 2+ –polyethyleneimine have been investigated using WAXS (wide-angle X-ray scattering), SAXS (small-angle X-ray scattering) methods as well as TEM (transmission electron microscopy) and thermomechanical analysis. It is defined that thermal reduction of Cu 2+ ions in IMC bulk (while films are heated to the temperature around 170 °C and higher temperatures) results in nanocomposites based on interpolyelectrolyte complexes "pectin–polyethyleneimine" and Cu nanoparticles being formed. In its turn, thermal reduction of copper ions is found out to take place owing to polyethyleneimine (namely, on account of electrons transfer from the amino groups' nitrogen atoms of polyethyleneimine to Cu 2+ ions). It has been shown by thermomechanical analysis that the optimal time for complete thermal reduction of Cu 2+ ions to metallic copper at T = 170 °C is 30 min. The antimicrobial investigations of the elaborated nanocomposites revealed they possess a high antimicrobial activity against S. aureus and E. coli strains.