Preparation of Magnetic Film Using Kappa Carrageenan Biopolymer Matrix and Its Characterization

Abstract:

We report the preparation of the free-standing magnetic film using solution casting method with κ-carrageenan as the matrix and magnetite nanoparticles (Fe₃O₄NP) as the magnetic material. The obtained film has a black-brown color and good responsiveness when exposed to permanent magnet. Fe₃O₄NP are evenly distributed over the κ-carrageenan matrix and tend to form agglomerations when the number of nanoparticles is increased. The presence of Fe₃O₄NP capped by trisodium citrate was demonstrated by the FTIR results of Fe-O, symmetric carboxylate (-COO-), and antisymmetric carboxylate stretching vibrations, respectively at wavenumbers of 418.6 cm^-1, 1458.2 cm^-1, and 1654.9 cm^-1. Functional groups in κ-carrageenan also appeared indicating that Fe₃O₄NP attached to-carrageenan matrix. The M-H curve of the magnetic film shows the increase in Fe₃O₄NP content would increase the magnetization value. The small coercivity field of the magnetic film value shows that the magnetic film is a soft ferromagnetic material.

• Periodical: Materials Science Forum (Volume 1152)
• Pages: 83-90
• DOI: https://doi.org/10.4028/p-KUkVJ1
• Online since: June 2025
• Authors: Maria Artha Febriyanti Turnip*, Paula Santi Rudati, Ahmad Taufiq, Agustinus Agung Nugroho
• Keywords: Kappa-Carrageenan (KC), Magnetic Film, Magnetite Nanoparticles

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