离子液体中合成Fe_3O_4/PANI复合纳米颗粒  

Preparing Fe_3O_4/PANI Nanocomposite Particles in Ionic Liquid

作　　者：李伟[1] 孟洪[2] 毋伟[1] 王倩[1] 陈建峰[1,3] 

机构地区：[1]北京化工大学纳米材料先进制备技术与应用科学教育部重点实验室 [2]北京化工大学化学工程学院,北京100029 [3]北京化工大学教育部超重力工程研究中心

出　　处：《高校化学工程学报》2009年第5期835-839,共5页Journal of Chemical Engineering of Chinese Universities

摘　　要：以FeCl3.6H2O和FeCl2.4H2O为原料,以水为介质,利用化学共沉淀法,常温下反应合成了Fe3O4纳米粒子,并进一步以Fe3O4纳米粒子为原料,采用原位聚合法分别在H2O和氯代1-丁基-3-甲基咪唑([BMIM]Cl)离子液体中合成了Fe3O4/聚苯胺(PANI)纳米复合粒子,用透射电子显微镜(TEM)、X射线衍射仪(XRD)、热分析仪(TG)、电导率仪、多功能振动样品磁强计对样品的形貌、结构和电磁性能进行了表征。结果表明:在这两种介质中都可以得到核壳型复合颗粒,但离子液体中合成的复合颗粒粒度小、分散性好且聚苯胺的结晶程度高。在离子液体中制备的复合材料与水中相同条件下制得的复合材料相比,电导率及磁性能均有提高。在离子液体中制备磁性导电复合材料是一种绿色高效的工艺。Using FeCl3.6H2O,FeCl2.4H2O and NaOH as raw materials and via chemical precipitation,the nano Fe3O4magnetic particles with diameters of 8～10 nm were synthesized at room temperature. Then the Fe3O4 nanoparticles were encapsulated with polyaniline （PANI） by in situ polymerization method in two kinds of solvents：water and 1-butyl-3-metylimidazolium （[Bmim]Cl） ionic liquid. X-Ray Diffraction （XRD）,Transmission Electron Microscope （TEM）,Thermogravimetic Analyzer （TG）,Conductivity Meter and Vibrating Sample Magnetism （VSM） were used to characterize the structure,morphology and electromagnetic properties of the prepared Fe3O4/PANI composite nanoparticles. The results indicate that the Fe3O4/PANI composite particles can be synthesized in both water and （[Bmim]Cl） ionic liquid,and the composite particles synthesized have the shell / core structure. The composite particles prepared in [Bmim]Cl ionic liquid have smaller size,better dispersibility and higher crystal degree of PANI. Moreover,their electrical conductivity is higher than that of the particles prepared in water with the same preparation process. It was found that preparing electromagnetic composite materials in ionic liquid is a green process with high efficiency.

关 键 词：离子液体 纳米复合颗粒 导电性 磁性 

分 类 号：TB383[一般工业技术—材料科学与工程]