用正交试验制备的高饱和磁化强度氟醚酸包覆Fe_3O_4纳米颗粒  

Synthesis of high saturation magnetization Fe_3O_4 nanoparticles coated by PFPE-acids based on orthogonal test

作　　者：颜琦 陈芳[2,3] 钱坤[2] 周倩如[2] 高君正 颜招强 YAN Qi;CHEN Fang;QIAN Kun;ZHOU Qian-ru;GAO Jun-zheng;YAN Zhao-qiang(Zigong Special Equipment Surveillance and Contronl Station, Zigong 643000, China;College of Material Science and Engineering, SiChuan University, Chengdu 610065, China;Zigong Zhaoqiang sealing products Industrial Co, Ltd, Zigong 643000, China)

机构地区：[1]自贡市特种设备监督检验所,四川自贡643000 [2]四川大学材料科学与工程学院,四川成都610065 [3]自贡兆强密封制品实业有限公司,四川自贡643000

出　　处：《磁性材料及器件》2017年第4期10-14,共5页Journal of Magnetic Materials and Devices

摘　　要：采用化学共沉淀法制备氟醚酸包覆的Fe_3O_4纳米颗粒,通过正交实验研究影响Fe_3O_4纳米颗粒饱和磁化强度的四个因素,得出其最优制备条件:Fe^(3+)与Fe^(2+)摩尔比为1.75:1,初始Fe^(3+)浓度为0.05 mol/L,初始pH值为9,共沉淀温度为65℃。按该优化条件制备的Fe_3O_4纳米颗粒的饱和磁化强度为55.80 A·m2/kg;该颗粒晶格类型与Fe_3O_4尖晶石结构相同,平均粒径大小约为11 nm;氟醚酸可通过化学吸附作用包覆于颗粒表层,且包覆量可达31.33%。To synthesize high-performance PFPE based ferrofluids,high saturation magnetization of Fe3O4nanoparticles coated by PFPE-acids was prepared first.Fe3O4nanoparticles were synthesized by using chemical precipitation.Four factors affecting the saturation magnetization were studied through orthogonal test,the optimal experimental parameters for preparation of PFPE-acids coated Fe3O4nanoparticles with high saturation magnetization were determined as Fe3+/Fe2+ratio of1.75/1,initial Fe3+concentration of0.05mol/L,initial hydrogen ion concentration(pH)of9,and co-precipitation temperature of65℃.According to the optimized condition,the Fe3O4nanoparticles with saturation magnetization of55.80A·m2/kg were obtained,higher than that of other samples in orthogonal test.The optimized sample has the inverse spine-type structure of iron oxides and their estimated crystallite sizes were about11nm.PFPE-acid can be chemically adsorbed on nanoparticles and the adsorbing capacity was up to31.33%.

关 键 词：Fe3O4纳米磁性颗粒 氟醚酸包覆 饱和磁化强度 正交试验 

分 类 号：TM277.1[一般工业技术—材料科学与工程]