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Abstract <p>Using the hydrothermal synthesis method, cellulose nanofibers were decorated under soft conditions “in-situ” with metallic Cu nanoparticles. Synthesis was carried out in aqueous media without protecting agents or surfactants. For this purpose as a precursor was efficiently tested novel homometallic pentacopper 12-MC-4 metallacrown based on β-alanine hydroxamic acid. The synthesized water-soluble copper(II) β‑alanine hydroximate metallacrown {Cu(II)[12-MC<sub>Cu(II)β-Alaha</sub>-4](SO<sub>4</sub>)(H<sub>2</sub>O)<sub>3</sub>}<sub>2</sub>·7H<sub>2</sub>O was structurally characterized. An extended analysis of the structure and morphology of the synthesized hybrid nanomaterials based on cellulose nanofibers decorated with copper nanoparticles was carried out using X-ray diffraction, scanning electron microscopy and transmission electron microscopy including high-resolution one. The obtained nanomaterial can be described as the nanocellulose fibers with mainly metallic Cu nanoparticles coated to them. The nanoparticles have a spherical shape with a narrow normal distribution of diameters from 3 to 5&#xa0;nm. The phase composition of the hybrid nanomaterial has been determined. The main phases are: nanocellulose, metallic Cu and copper(I) oxide. At the same time, electron microscopy methods have established that the main phase of ultradispersed nanoparticles is metallic copper. The developed method for obtaining nanoparticles on nanocellulose is an effective method for creating such hybrid nanomaterials nanocellulose-copper for biomedical applications.</p>

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The Nondestructive Way Nanocellulose Modification with Copper Ultrananoparticles via Polynuclear 12-MC-4 Metallacrown Decomposition

  • 期刊论文

  • 发表日期：

    2025年7月1日

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  • I. V. Vilkov,
  • G. S. Zabrodina,
  • R. V. Rumyantcev,
  • A. M. Ob’edkova,
  • M. A. Katkova,
  • S. Yu. Ketkov

摘要

Abstract

Using the hydrothermal synthesis method, cellulose nanofibers were decorated under soft conditions “in-situ” with metallic Cu nanoparticles. Synthesis was carried out in aqueous media without protecting agents or surfactants. For this purpose as a precursor was efficiently tested novel homometallic pentacopper 12-MC-4 metallacrown based on β-alanine hydroxamic acid. The synthesized water-soluble copper(II) β‑alanine hydroximate metallacrown {Cu(II)[12-MCCu(II)β-Alaha-4](SO4)(H2O)3}2·7H2O was structurally characterized. An extended analysis of the structure and morphology of the synthesized hybrid nanomaterials based on cellulose nanofibers decorated with copper nanoparticles was carried out using X-ray diffraction, scanning electron microscopy and transmission electron microscopy including high-resolution one. The obtained nanomaterial can be described as the nanocellulose fibers with mainly metallic Cu nanoparticles coated to them. The nanoparticles have a spherical shape with a narrow normal distribution of diameters from 3 to 5 nm. The phase composition of the hybrid nanomaterial has been determined. The main phases are: nanocellulose, metallic Cu and copper(I) oxide. At the same time, electron microscopy methods have established that the main phase of ultradispersed nanoparticles is metallic copper. The developed method for obtaining nanoparticles on nanocellulose is an effective method for creating such hybrid nanomaterials nanocellulose-copper for biomedical applications.