Magneto-thermal Behavior of MnxFe3-xO4 PVA/PVP Magnetic Hydrogel and Its Application Potential
Muchlis Fajar Hidayat1, Samsul Hidayat1, Ahmad Taufiq1,2, and Sunaryono1,2,*
UM
Abstract
Composites material that composed of hydrogel polymers and magnetic nanoparticles commonly called magnetic hydrogels have been extensively developed with the focus of research on variations of the two main substances. The previous report, hydrogels have been successfully fabricated by using polyvinyl alcohol (PVA) polymers and combination of PVA and Polyvinylpyrrolidone (PVP) as the matrix of the polymer. In addition, magnetite has also been widely used as a filler in magnetic hydrogel fabrication due to its magnetic properties and magneto-thermal behavior. To improve the magneto-thermal behavior of magnetic hydrogels, the magnetic hydrogel has been successfully synthesized by using a PVP/PVA polymer as a matrix and magnetite with Mn-doped variations x = 0.3 and 0.6 as filler. Based on the XRD analysis, the particle size of MnxFe3-xO4 powder was 10.4 nm which corresponds to the TEM results which were 9.9 nm. In addition, the nanostructures of magnetic hydrogel samples were characterized by using SAXS instrument and successfully analyzed by using the Two-lognormal, Beaucage and Teubner-Strey functions. The primary and secondary particle sizes of MnxFe3-xO4 powder was 3.3 and 9.8 nm respectively, while the crystallite size and the distance between crystals from the PVP/PVA hydrogel was 8.8 and 39 nm respectively. Furthermore, the magneto-thermal Instrument was also carried out on samples and an average Specific Absorption Rate (SAR) value of 0.00372 W/gr was obtained. This result showed that the magnetic hydrogel has a potential candidate as hyperthermia therapy.
Keywords: magnetic hydrogels, SAXS, primary particle, polymer
Topic: Smart materials