Main Subjects : Nano-physics
Study and Characterization of Super Paramagnetic Nanoparticles Coated with Chitosan Polymer (SPIONs-CS)
Kirkuk University Journal-Scientific Studies,
2022, Volume 17, Issue 3, Pages 29-38
Preparation of iron salts Fe + 3 Fe+2 This study aims to prepare super-magnetic nanoparticles coated with chitosan-CS SPIONs in an easy and inexpensive chemical way, which is the method of co-precipitation mediated in aqueous solution and mixing it with a solution of chitosan CS dissolved in dilute citric acid 1 % and precipitation of this mixture in a solution of NaOH and sodium citrate acid as a surfactant inside a closed system using an inert atmosphere for nitrogen gas N2 and a packaging method during the preparation. These particles were diagnosed by (XRD), and it was found that the particles coated with chitosan SPIONs-CS contain the crystal structure of iron oxide and that the polymer shell did not affect its crystal phase. It has a super magnetic property that decreases with increasing concentrations of the chitosan polymer encapsulating the particles, but it is sufficient to respond to the magnetic field. It was found from the diagnostic results that the prepared secondary particles were within the nanoscale 20 nm according to in TEM, which is Converging with the obtained size of 22.8 nm XRD technique, Zeta potential analysis results showed that the SPIONs-CS had a negative surface charge after encapsulation with a zeta voltage of -28.4mv at 0.125 chitosan concentration.g CS . (SEM) diagnosis results showed that the particles are spherical in shape and spaced according to the CS chitosan concentrations used for encapsulation with an average diameter of (27.58nm, 20.023nm and 35.127nm) for three concentrations (0.100g, 0.125g, 0.150g), respectively.