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. 2021 Sep 22;13(19):3212.
doi: 10.3390/polym13193212.

Green Synthesis of Stable Nanocomposites Containing Copper Nanoparticles Incorporated in Poly-N-vinylimidazole

Alexander S Pozdnyakov  1 , Artem I Emel'yanov  1 , Svetlana A Korzhova  1 , Nadezhda P Kuznetsova  1 , Yuliya I Bolgova  1 , Olga M Trofimova  1 , Tatyana A Semenova  1 , Galina F Prozorova  1
Affiliations

Green Synthesis of Stable Nanocomposites Containing Copper Nanoparticles Incorporated in Poly-N-vinylimidazole

Alexander S Pozdnyakov et al. Polymers (Basel). .

Abstract

New stable nanocomposites with copper nanoparticles (CuNPs) in a polymer matrix have been synthesized by green chemistry. Non-toxic poly-N-vinylimidazole was used as a stabilizing polymer matrix and ascorbic acid was used as a reducing agent. The polymer CuNPs nanocomposites were characterized by Fourier transform infrared (FTIR) spectroscopy, ultraviolet-visible (UV) spectroscopy, transmission electron microscopy (TEM), scanning electron microscopy (SEM), atomic absorption spectroscopy (AAS), and thermogravimetric analysis (TGA). It was shown, using the dynamic light scattering (DLS) method, that the hydrodynamic diameters of nanocomposites depend on the CuNPs content and are in an associated state in an aqueous medium. The copper content in nanocomposites ranges from 1.8 to 12.3% wt. The obtained polymer nanocomposites consist of isolated copper nanoparticles with a diameter of 2 to 20 nm with a spherical shape.

Keywords: ascorbic acid; copper nanoparticles; poly-N-vinylimidazole; polymer nanocomposite.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Scheme 1
Scheme 1
Synthesis of poly-N-vinylimidazole.
Figure 1
Figure 1
GPC traces of PVI were used to obtain nanocomposites.
Figure 2
Figure 2
1H (a) and 13C (b) NMR spectra of PVI.
Scheme 2
Scheme 2
Formation and stabilization of copper nanoparticles.
Figure 3
Figure 3
FTIR spectra of PVI and polymer nanocomposites with CuNPs 1–4.
Figure 4
Figure 4
UV spectra of aqueous solutions of polymer nanocomposites 2 (a) and 4 (b).
Figure 5
Figure 5
Electron microphotographs (a,c,e,g) and diagrams of CuNPs size distribution (b,d,f,h) of polymer nanocomposites: 1 (a,b), 2 (c,d), 3 (e,f), and 4 (g,h).
Figure 5
Figure 5
Electron microphotographs (a,c,e,g) and diagrams of CuNPs size distribution (b,d,f,h) of polymer nanocomposites: 1 (a,b), 2 (c,d), 3 (e,f), and 4 (g,h).
Figure 6
Figure 6
Histogram of the distribution of scattering particles over hydrodynamic diameters for PVI and nanocomposites 1–4 in an aqueous-salt solution (a) and in water (b).
Figure 7
Figure 7
Stabilization of CuNPs by PVI (a) and association of nanocomposites by hydrogen bonds (b).
Figure 8
Figure 8
Electron microphotographs of polymer nanocomposite 3.
Figure 9
Figure 9
SEM (a,c) and EDS (b,d) of PVI (a,b) and nanocomposite 4 (c,d).
Figure 10
Figure 10
TGA (1) and DSC (2) curve for the initial poly-N-vinylimidazole (a) and copper nanocomposite 2 (b).
Figure 11
Figure 11
Mass spectra of copper nanocomposite 2.
See this image and copyright information in PMC

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