SiO_2表面包覆对Fe_3O_4磁性微球性能的影响  

Effects of SiO_2 Surface Coating on the Performance of Magnetic Fe_3O_4 Microspheres

作　　者：林霞[1,2] 陈培丰[1,2] 黄风华[1,2] 许金访[1] 

机构地区：[1]福建师范大学化学与材料学院,福建福州350007 [2]福建师范大学福建省高分子材料重点实验室,福建福州350007

出　　处：《合成化学》2010年第4期507-510,共4页Chinese Journal of Synthetic Chemistry

基　　金：福建省自然科学基金资助资助项目(2009J01022);福建省教育厅基金资助项目(JBO7O75);医学光电科学与技术教育部重点实验室(福建师范大学)测试基金资助项目(JYG0813);福建省高分子材料重点实验室测试基金资助项目(FJKL-POLY2010-16)

摘　　要：采用化学共沉淀法制备Fe3O4磁性纳米粒子;用柠檬酸钠进行表面修饰得到在水相中稳定分散的Fe3O4溶胶。以Fe3O4磁性纳米粒子为种子,用碱催化正硅酸四乙酯水解、缩合制备了粒径和磁性可控的核壳结构的Fe3O4@SiO2复合微球。通过FT-IR,XRD,TEM,VSM和古埃磁天平对Fe3O4@SiO2复合微球进行表征。研究了SiO2包覆对Fe3O4@SiO2复合微球性能的影响。Magnetic Fe3O4 nanoparticles were prepared by chemical coprecipitation and then were stabilized by citrate sodium,and a stable aqueous-base Fe3O4 colloid was obtained.Core-shell structural Fe3O4@SiO2 composite microspheres with adjustable diameter and magnetism were prepared by hydrolysis and condensation of tetraethyl orthosilicate using Fe3O4 nanoparticles as seeds.XRD,TEM,FT-IR,VSM and the Gouy magnetic balance were applied to characterize the Fe3O4@SiO2 composite microspheres.The effects of SiO2 coating on the performance of Fe3O4@SiO2 composite microspheres were investigated.

关 键 词：SiO2包覆 FE3O4 磁性微球 制备 磁性能 

分 类 号：O614.81[理学—无机化学]