Zhu Huai-wu, Zhang Chao-ping
Department of Chemistry, Guizhou Normal University, Guiyang 550025, China.
Guang Pu Xue Yu Guang Pu Fen Xi. 2004 Jan;24(1):25-8.
The composite nanoparticles of Ni-ferrite with coated gelatin were prepared with the gel-microemulsion chemical tailoring method. The gelatin FeCl2 and NiCl2 were used to prepare gel, which was tailored to be particles in micellar of microemulsion, and the particles were reduced, compounded and nucleated. Surveying by XRD, TEM, IR and EDS showed that the particles formed were coated by gelatin protein and their mean sizes are in the range of 10-100 nm, and particle sizes are 3.3-4.6 nm. There are about 3-22 NiFe2O4 particles on each spheroid. The measurement of magnetic parameters indicated that the specific saturation magnetization was sigma(s) = 36.31 x 10(3)/4pi(A x m(-1) x g(-1)), coercivity was H(c) = 6750 A x m(-1), and residual magnetism B(r) = 4.39 x 10(3)/4pi(A x m(-1) x g(-1)).
采用凝胶微乳液化学剪裁法制备了明胶包覆的镍铁氧体复合纳米粒子。用明胶、氯化亚铁和氯化镍制备凝胶，将其剪裁成微乳液胶束中的颗粒，然后对颗粒进行还原、复合和成核。通过X射线衍射（XRD）、透射电子显微镜（TEM）、红外光谱（IR）和能谱分析（EDS）表明，形成的颗粒被明胶蛋白包覆，其平均尺寸在10 - 100nm范围内，粒径为3.3 - 4.6nm。每个球体上约有3 - 22个镍铁氧体颗粒。磁参数测量表明，比饱和磁化强度为σ(s) = 36.31×10(3)/4π(A×m(-1)×g(-1))，矫顽力为H(c) = 6750 A×m(-1)，剩余磁性B(r) = 4.39×10(3)/4π(A×m(-1)×g(-1))。
