高饱和磁化强度氟醚油基磁性液体制备及性能  

Preparation and performance of PFPE-oil based ferrofluid with high saturation magnetization

作　　者：雷建波 颜招强 陈芳[3,2] LEI Jan-bo;YAN Zhao-qiang;CHEN Fang(Navy Chongqing Bureau,Chongqing 500000,China;School of Materials Science and Engineering,Sichuan University,Chengdu 610065,China;Zigong Zhaoqiang Seal Product Limited Company,Zigong 643030,China)

机构地区：[1]海军重庆局,重庆500000 [2]自贡兆强密封制品实业有限公司,四川自贡643030 [3]四川大学材料科学与工程学院,四川成都610065

出　　处：《磁性材料及器件》2019年第3期33-38,共6页Journal of Magnetic Materials and Devices

摘　　要：采用化学共沉淀法,通过调控锌掺杂比例制备高饱和磁化强度锌铁氧体纳米颗粒,用氟醚酸包覆颗粒,并将其分散到特异性氟醚油中制备磁性液体。对颗粒进行XRD、EDS、TEM、FTIR、TGA表征,对磁性液体进行耐腐蚀性、分散稳定性测试。结果表明,改变锌配比不影响颗粒的尖晶石结构,样品的饱和磁化强度随锌配比的增加先增大后减小;氟醚酸通过羧基官能团化学吸附于纳米颗粒表层;制备的磁性液体具有良好的沉降稳定性和耐腐蚀性能。高饱和磁化强度、耐腐蚀氟醚油基磁性液体将拓宽其应用范围,尤其是腐蚀性气、液体的密封。High saturation magnetization zinc ferrite nanoparticles were prepared through chemical coprecipitation by controlling the zinc doping ratio.The particles were coated by PFPE-acids and then were dispersed in PFPE-oil for high performance ferrofluid.XRD,EDS,TEM,FTIR,and TGA were used to investigate the property of the nanoparticles.The corrosion resistance and stability of the ferrofluids were also characterized.Results show that the adjustment of zinc doping ratio didn't change the spinel structure of the nanoparticles.The saturation magnetization of the particles firstly increases and then decreases with increasing zinc doping ratio.PFPE-acid is chemically adsorbed on the nanoparticles by the COOH functional group.The prepared ferrofluids have superior sedimentation stability and corrosion resistance.The high saturation magnetization and corrosion resistance PFPE-oil ferrofluids will broaden the range of application,especially,in seal of corrosive gas and liquid.

关 键 词：磁性液体 纳米磁性颗粒 耐腐蚀性 锌铁氧体 

分 类 号：TM271[一般工业技术—材料科学与工程] TB383[电气工程—电工理论与新技术]