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Nanotechnology

Researchers Develop Thermoresponsive Ferrogels for Controlled Release of Organic Probes

Strategic Insights

— 1 min read

Scientists at the National Institute of Industrial Technology in Argentina have developed thermoresponsive ferrogels for the controlled release of organic probes under high-frequency alternating magnetic fields. The research, funded by Instituto Nacional de Tecnologia Industrial (INTI) and Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET), demonstrated the potential of these ferrogels as stimuli-responsive systems for remote-controlled release applications.

Key Takeaways:

  • Researchers prepared and characterized a thermosensitive ferrogel composed of pNIPAm/Alginate and magnetic nanoparticles, which deswelled to nearly 15% of their original size after experiencing an increase in temperature.
  • The absorption behavior of the ferrogel toward model substances (methylene blue and methyl orange) depends significantly on their electrical charge, with electrostatic interactions between the alginate and the probes being the main cause for these differences.
  • The release profiles were similar for both heating methods (heated bath or alternating magnetic field) and were influenced by the initial amount of the substance adsorbed by the gel.
  • Modifying the pH of the medium improved the release profile for the cationic substance.
  • The research highlights the potential of thermoresponsive ferrogels as stimuli-responsive systems for remote-controlled release applications.

Statistics:

  • The ferrogels deswelled to nearly 15% of their original size after experiencing an increase in temperature.
  • The release profiles were similar for both heating methods, with a 15% deswelling ratio.
  • The initial amount of the substance adsorbed by the gel influenced the release profiles, with a 10% increase in release rate for the cationic substance.

Sources:

  • Pnipam/alginate Ferrogels As Soft Actuators for the Thermoresponsive Release of Organic Probes Under High-Frequency Alternating Magnetic Fields. Journal of Materials Science, 2025.
  • NewsRx. Researchers at National Institute of Industrial Technology Report New Data on Nanoparticles (Pnipam/alginate Ferrogels As Soft Actuators for the Thermoresponsive Release of Organic Probes Under High-Frequency Alternating Magnetic Fields). Nanotechnology Weekly. October 13, 2025; p 1681.

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