Điều chế và đặc tính hóa của các nanocomposites fe3o4-chitosan superparamagnetic

• Ngôn ngữ: vie
• Ký hiệu phân loại: 620.5 Nanotechnology
• Thông tin xuất bản: Hóa học, 2014
• Mô tả vật lý: 246-250
• Bộ sưu tập: Metadata
• ID: 563523

Tóm tắt

In this study, superparamagnetic nanocomposite Fe3O4-chitosan has been prepared by two step method. The Fe3O4 nanoparticles were prepared by a co-precipitation process and subsequently coated with chitosan. The magnetite nanoparticles and chitosan coated magnetic nanoparticles were characterized by XRD, IR and TEM. The magnetic properties were measured with homemade vibrating sample magnetometer (VSM) and evaluated in terms of saturation magnetization and coercivity. The results revealed that typical iron oxide nanoparticles were Fe3O4 with a core diameter of 15-20 nm. Magnetie nanoparticles were formed inside the chitosan matrix through possible binding of iron ions to NH2 group of chitosan. The Fe3O4-chitosan nanoparticles with core-shell structure exhibit superparamagnetic properties and highly dispersed nano magnetite particles with diameters around 15 nm.