高饱和磁化强度氟醚油基磁性液体制备及性能
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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.
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.
引文
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[21]曹雪,洪若瑜.聚乙二醇改性锰锌铁氧体纳米颗粒的制备及应用[J].精细石油化工,2010,27(4):53-56.
[2]李学慧,李艳琴.磁性液体智能材料[M].北京:科学出版社,2014.2-3.
[3]李德才,磁性液体密封理论及应用[M].北京:科学出版社,2010.1-2.
[4]颜琦,陈芳,钱坤.用正交实验制备的高饱和磁化强度氟醚酸包覆Fe3O4纳米颗粒[J].磁性材料及器件[J],2018,49(4):10-14.
[5]罗新,刘世雄.非晶铁合金汞基磁流体的制备和性质[J].材料研究学报,2007,20(3):277-280.
[6]程燕红,李德才,戴荣坤.氟醚油基磁性液体密封启动力矩的实验分析[J].哈尔滨工程大学学报,2017,38(8):1316-1321.
[7]张荣良,张小飞.纳米锌铁氧体研究现状及发展前景[J].无机盐工业,2016,48(12):11-13.
[8]何学敏.3d过渡金属及其氧化物纳米颗粒的磁性[D].南京:南京大学,2015.
[9]Zhou Y,Lin W,Huang J,et al.Biosynthesis of gold nanoparticles by foliar broths:roles of biocompounds and other attributes of the extracts[J].Nanoscale Research Letters,2010,5(8):1351-1359.
[10]李茹民,刘致阳,张密林.ZnxFe3-xO4的制备及磁性能研究[J].功能材料,2007,38:1000-1002.
[11]Kavas H,Baykal A,Toprak M S,et al.Cation distribution and magnetic properties of Zn doped Ni Fe2O4 nanoparticles synthesized by PEG-assisted hydrothermal route[J].JAlloys Compds,2009,479(1-2):49-55.
[12]Srivastava M,Alla S K,Meena S S,et al,Znx Fe3-x(0.01≤x≤0.8)nanoparticles for controlled magnetic hyperthermia application[J].New Journal of Chemistry,2018,42(9):7144-7153.
[13]Chen F H,Zhao T N,Chen Q T.Size controlled monodisperse hydrophobic and hydrophilic magnetitenanoparticles:one potsynthesis,characterization,and the mechanism study[J].Mater Res Bull,2013,48(10):4093-4099.
[14]Behdadfar B,Kermanpur A.Synthesis of aqueous ferrofluids of Znx Fe3-x O4 nanoparticles by citric acid assisted hydrothermal-reduction route for magnetic hyperthermia applications[J].J Magn Magn Mater,2012,324(14):2211-2217.
[15]叶荣昌,刘书进,杨志伊,等.锰锌铁氧体磁流体中Zn2+的作用及其影响机理的研究[J].功能材料,2003,34(5):515-517.
[16]Khan U S,Khattak N S,Manan A,et al.Some properties of magnetite nanoparticles produced under different conditions[J].J Electron Mater,2014,43:303-312.
[17]Pathak T K,Vasoya N H,Lakhani V K,et al.Structural and magnetic phase evolution study on needle-shaped nanoparticles of magnesium ferrite[J].Ceram Int,2010,36(1):275-281.
[18]Meng H,Zhang Z,Zhao F,et al.Orthogonal optimization design for preparation of Fe3O4,nanoparticles via chemical coprecipitation[J].Appl Surf Sci,2013,280(8):679-685.
[19]Doan V,K?ppe R,Kasai P H.Dimerization of carboxylic acids and salts:an IR study in perfluoropolyether media[J].J Am Cera Soc,1997,119(41):9810-9815.
[20]Venkateswarlu S,Kumar B N,Prasad C H.Bio-inspired green synthesis of Fe3O4,spherical magnetic nanoparticles using Syzygium cumini,seed extract[J].Phys B Conden Matter,2014,449:67-71.
[21]曹雪,洪若瑜.聚乙二醇改性锰锌铁氧体纳米颗粒的制备及应用[J].精细石油化工,2010,27(4):53-56.