多功能磁性复合微球的制备及超声特性研究  

Synthesis of multi-functional magnetic composite microspheres and study on its ultrasound performance

作　　者：王娇娇[1] 石国娇 凤飞龙[1] 王公正[1] WANG Jiaojiao;SHI Guojiao;Feng Feilong;WANG Gongzheng(School of Physics and Information Technology,Shaanxi Normal University,Xi＇an 710119,Shaanxi,China)

机构地区：[1]陕西师范大学物理学与信息技术学院,陕西西安710119

出　　处：《陕西师范大学学报（自然科学版）》2018年第5期45-50,55,共7页Journal of Shaanxi Normal University：Natural Science Edition

基　　金：国家自然科学基金(11774212;11274216)

摘　　要：设计并制备了一种新的亚微米级磁性复合微球,检测了该微球对超声的吸收作用。采用水热法制备亚微米级Fe_3O_4模板微球,通过改进的St9ber方法对磁性Fe_3O_4粒子进行SiO_2包覆,并用MPS化学试剂修饰所得复合微球,通过聚合反应得到PNIPAM@SiO_2@Fe_3O_4磁性复合材料。对所获亚微米级磁性复合材料的结构和性能进行了表征,检测了该复合材料的超声波性能。结果表明:该亚微米级复合材料呈现球状核壳结构,具有良好的超顺磁性,且对超声波具有较好的吸收作用,因此该复合材料可以应用于吸波、降噪、减震等领域。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 st9 ber 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.

关 键 词：磁性微球 Fe3O4粒子 复合吸波材料 超声衰减系数 

分 类 号：O482.54[一般工业技术—材料科学与工程]