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Synthesis of Gadolinium-Loaded Poly(N-vinyl-2-pyrrolidone) Nanogels Using Pulsed Electron Beam Ionizing Irradiation

  • 0Centre de Recherche Scientifique et Technique en Analyses Physico-Chimiques (CRAPC), Tipaza 42000, Algeria.
Polymers +

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August 14, 2025

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August 14, 2025

View abstract on PubMed

Summary

This summary is machine-generated.

Researchers synthesized Poly(N-vinyl-2-pyrrolidone) (PVP) nanogels loaded with gadolinium nitrate for MRI applications. Nanogel size and stability depend on factors like PVP molecular weight, concentration, temperature, and gadolinium introduction timing.

Area Of Science

  • Materials Science
  • Polymer Chemistry
  • Nanotechnology

Background

  • Poly(N-vinyl-2-pyrrolidone) (PVP) is a versatile polymer with potential applications in biomedical fields.
  • Gadolinium (Gd) compounds are essential contrast agents for Magnetic Resonance Imaging (MRI).
  • Developing stable and efficient Gd-loaded nanocarriers is crucial for advanced MRI contrast agents.

Purpose Of The Study

  • To synthesize Poly(N-vinyl-2-pyrrolidone) (PVP) nanogels loaded with gadolinium nitrate (Gd(NO3)3·6H2O) using ionizing irradiation.
  • To investigate the complexation between PVP and Gd ions and its effect on nanogel formation.
  • To explore the factors influencing the size and stability of Gd-loaded PVP nanogels for potential MRI applications.

Main Methods

  • Synthesis of PVP nanogels via ionizing irradiation.
  • Characterization of PVP and Gd aqueous solutions using various analytical techniques.
  • Quantification of free Gd ions to assess loading efficiency and stability.
  • Analysis of factors affecting nanogel size: PVP molecular weight, concentration, temperature, and Gd introduction timing.

Main Results

  • Complexation between PVP and Gd ions was observed prior to irradiation.
  • Nanogel size demonstrated a significant dependence on PVP molecular weight, concentration, temperature, and the timing of Gd introduction.
  • The VP/Gd ratio and the sequence of Gd addition (before or after irradiation) impacted the concentration of free Gd ions.
  • Optimized synthesis conditions are crucial for controlling nanogel properties.

Conclusions

  • Ionizing irradiation is an effective method for synthesizing Gd-loaded PVP nanogels.
  • Controlling synthesis parameters is key to tailoring nanogel size, stability, and Gd loading for MRI applications.
  • These Gd-loaded PVP nanogels show promise as novel contrast agents for enhanced MRI.

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