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利用共沉淀法合成Fe3O4磁性纳米粒子,并使用油酸改性生成了粒径均一的油性纳米粒子.使用3-(甲基丙烯酰氧)丙基三甲氧基硅烷,聚乙二醇甲基丙烯酸酯以及荧光可聚合配合物Eu(AA)3Phen为原材料合成了含有稀土金属Eu的两亲性的聚合物为配体,以油性Fe3O4为核,采用配体交换反应制备水性的磁性荧光微粒.并通过核磁共振波谱仪、傅里叶红外光谱仪、透射电子显微镜、动态光散射粒径测试仪、X射线衍射仪、振动样品磁强计、荧光分光光度计、热重分析仪对该微粒进行形貌、结构、超顺磁性以及荧光性能的测试表征.测试结果表明,两亲性聚合物良好有效地包覆在了磁性纳米粒子表面,制得的含稀土磁性荧光微粒在水相中具有良好的分散性,粒径均一,其平均粒径仅为45 nm,室温下的饱和磁化强度为2.3 A·m2/kg,研究过程中测得微粒中的稀土Eu3+在594 nm和619 nm有明显的特征发射光谱.
The co-precipitation method was used to synthesize Fe3O4 magnetic nanoparticles and oleic acid modified to produce oily nanoparticles with uniform particle size.Using 3- (methacryloyloxy) propyltrimethoxysilane, polyethylene glycolmethacrylic acid Ester and fluorescent polymerizable complex Eu (AA) 3Phen as raw materials, an amphiphilic polymer containing rare earth metal Eu was synthesized as a ligand, and aqueous magnetic fluorescent microparticles were prepared by ligand exchange reaction using oil-based Fe3O4 as a nucleus. The morphology of the particles was characterized by nuclear magnetic resonance spectroscopy, Fourier transform infrared spectroscopy, transmission electron microscopy, dynamic light scattering particle size analyzer, X-ray diffraction, vibrating sample magnetometer, fluorescence spectrophotometer and thermogravimetric analyzer , Structure, superparamagnetism and fluorescence properties of the magnetic nanoparticles.The results show that the amphiphilic polymer is well coated on the surface of the magnetic nanoparticles, and the prepared rare earth-containing magnetic fluorescent particles have good dispersion in the aqueous phase The average particle size is only 45 nm and the saturation magnetization is 2.3 A · m2 / kg at room temperature. The measured Eu3 + content of the rare earth particles at 594 nm and 619 nm has obvious characteristics Radio spectrum.