Synthesis of multi-functional magnetic composite microspheres and study on its ultrasound performance
WANG Jiaojiao, SHI Guojiao, Feng Feilong, WANG Gongzheng*
(School of Physics and Information Technology, Shaanxi Normal University, Xi′an 710119, Shaanxi, China)
Abstract:
A novel submicron magnetic composite microsphere was designed and prepared, and the ultrasonic absorption effect of the microsphere was tested. Submicron Fe3O4 template microspheres were obtained by hydrothermal synthesis method. Furthermore, SiO2@Fe3O4 submicron magnetic microspheres were received by stber method, MPS chemical was chosen to modify SiO2@Fe3O4 submicron magnetic microspheres. Finally, PNIPAM@SiO2@Fe3O4 submicron magnetic composite microspheres were obtained by polymerization.The structures and properties of the resulting submicron magnetic composites were analysed.The ultrasonic properties of the composite material were also tested.The results show that the submicron composite materials exhibit spherical core-shell structure and good superparamagnetic properties.The composites has an obvious absorption effect on the ultrasonic wave, so the composite material can be used in the field of wave absorption, noise reduction and shock absorption.
KeyWords:
magnetic microspheres; Fe3O4 particles; composite absorbing material; ultrasonic attenuation coefficient
