preparation and characterization of Fe3O4 magnetic nanoparticles coated with carboxymethyl chitosan grafted sodium methacrylate

N-sodium acrylate-O-carboxymethyl chitosan [CMCH-g-PAA(Na)] bound Fe3O4 nanoparticles were developed as a novel magnetic nanoparticles with ionic structure that can be potentially used in many fields. CMCH-g-PAA (Na) was obtained by grafting of sodium polyacrylate on O-carboxymethyl chitosan which is an amphiphilic, polyelectrolyte with the property of biocompatibility ,biodegradability and functional carboxyl groups. It was used as a stabilizer to prepare a well dispersed suspension of magnetic nanoparticle. The carboxyl group of modified chitosan can adsorb onto the surface of Fe3O4 nanoparticles. X-ray diffraction (XRD), demonstrated that our magnetic nanoparticles were Fe3O4 with spinel structure and coating process of polymer did not change theirs structure,also we used dynamic light scattering (DLS) apparatus, fourier transform infrared spectroscopy (FT-IR) , thermal gravimetry analysis (TGA),scanning electron microscopy (SEM) and vibration sample magnetometer (VSM) analysis to prove that our experiment , consist of coating CMCH-g-PAA(Na) on the magnetic nanoparticles was performed efficiently

کلیدواژه ها:

Fe3O4 magnetic nanoparticles ، Carboxymethyl chitosan ، sodium methacrylate ، grafted