高密度煤油基磁性液体的制备及其性能表征  

Preparation and Characterization of High Density Kerosene Based Magnetic Fluid

作　　者：韩世达 崔红超[1] 张佳佳 李振坤 Han Shida;Cui Hongchao;Zhang Jiajia;Li Zhenkun(School of Mechanical,Electronic and Control Engineering,Beijing Jiaotong University,Beijing 100044,China)

机构地区：[1]北京交通大学机械与电子控制工程学院,北京100044

出　　处：《稀有金属材料与工程》2023年第3期1113-1119,共7页Rare Metal Materials and Engineering

基　　金：北京市自然科学基金(2222072);中央高校基本科研业务费(2022JBMC032);载运工具先进制造与测控技术教育部重点实验室(北京交通大学)开放课题基金(M21GY1300050)。

摘　　要：采用化学共沉淀法,通过改变Fe_(3)O_(4)纳米颗粒的生长温度、包覆环境pH、清洗、分散方式等工艺参数进行对比试验,得出Fe_(3)O_(4)纳米颗粒在生长阶段、包覆阶段、分散阶段的最佳参数条件,优化以往的制备工艺,使油酸包覆的磁性颗粒在煤油中的分散稳定性得到提高。通过XRD、TEM、VSM等对样品进行表征,并使用旋转流变仪对所制煤油基磁性液体的流变性能进行分析。结果表明,改性后的Fe_(3)O_(4)纳米颗粒平均粒径约为14nm,呈现较为规则的球形,饱和磁化强度为60(A·m^(2))·kg^(-1),可制备出质量分数可达60%的高密度煤油基磁性液体,与普通磁液相比,以此制备工艺得的高密度煤油基磁性液体在饱和磁化强度、抗氧化性等方面皆有较大提升,拥有更高的应用价值。Using the chemical coprecipitation method,the comparative experiments were carried out by changing the process parameters such as growth temperature,pH value of coating environment,cleaning and dispersion mode of Fe_(3)O_(4)nanoparticles.The best parameters and conditions of Fe_(3)O_(4)nanoparticles in growth stage,coating stage and dispersion stage were summarized and the previous preparation process was optimized to improve the dispersion stability of oleic acid coated magnetic particles in kerosene.Th e samples were characterized by XRD,TEM and VSM and the rheological properties of the kerosene based magnetic fluid were analyzed by rotati ng rheometer.The results show that the average particle size of the modified Fe_(3)O_(4)nanoparticles is about 14 nm,showing a regular sphere.The saturation magnetization of modified Fe_(3)O_(4)nanoparticle is 60(A·m^(2))·kg^(-1)and high-density kerosene based magnetic fluid with a mass fraction of 60%is prepared.Compared with ordinary magnetic fluid,the high-density kerosene based magnetic fluid obtained by this preparation process has a great improvement in saturation magnetization and oxidation resistance and has higher application v alue.

关 键 词：磁性液体 Fe_(3)O_(4)纳米颗粒 制备方法 磁饱和强度 

分 类 号：TB34[一般工业技术—材料科学与工程]