Center for Green Chemistry and Catalysis, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, China.
Phys Chem Chem Phys. 2012 Apr 21;14(15):5132-8. doi: 10.1039/c2cp23675c. Epub 2012 Feb 27.
Ionic liquids (ILs)-stabilized iron oxide (Fe(2)O(3)) nanoparticles were synthesized by the ultrasonic decomposition of iron carbonyl precursors in [EMIm][BF(4)] without any stabilizing or capping agents. The Fe(2)O(3) nanoparticles were isolated and characterized by X-ray powder diffraction, transmission electron microscopy and susceptibility measurements. The physicochemical properties of ILs containing magnetic Fe(2)O(3) nanoparticles (denoted as Fe(2)O(3)@[EMIm][BF(4)]), including surface properties, density, viscosity and stability, were investigated in detail and compared with that of [EMIm][BF(4)]. The Fe(2)O(3)@[EMIm][BF(4)] can be directly used as magnetic ionic liquid marble by coating with hydrophobic and unreactive polytetrafluoroethylene (PTFE), for which the effective surface tension was determined by the puddle height method. The resulting magnetic ionic liquid marble can be transported under external magnetic actuation, without detachment of magnetic particles from the marble surface that is usually observed in water marble.
离子液体（ILs）稳定的氧化铁（Fe2O3）纳米粒子通过超声分解铁羰基前体在[EMIm][BF4]中合成，无需任何稳定剂或封端剂。Fe2O3 纳米粒子通过 X 射线粉末衍射、透射电子显微镜和磁化率测量进行分离和表征。详细研究了含有磁性 Fe2O3 纳米粒子的 IL（表示为 Fe2O3@[EMIm][BF4]）的物理化学性质，包括表面性质、密度、粘度和稳定性，并与[EMIm][BF4]进行了比较。通过用疏水性和非反应性聚四氟乙烯（PTFE）涂覆，Fe2O3@[EMIm][BF4]可直接用作磁性离子液体弹珠，其有效表面张力通过液滴高度法确定。在外磁场作用下，所得磁性离子液体弹珠可以输送，而不会像在水弹珠中那样观察到磁性粒子从弹珠表面脱落。
