以甲氧基聚乙二醇同时作为溶剂、还原剂及修饰剂,在高温下分解乙酰丙酮铁,制备了纳米Fe3O4粒子,采用透射电子显微镜和X射线衍射分析表征材料的形貌和相组成,傅里叶变换红外光谱仪表征材料的表面修饰物,超导量子干涉仪测试合成的纳米粒子的磁性能,纳米粒度与zeta电势分析仪测试磁性纳米粒子在水中的zeta电势.结果表明,纳米Fe3O4粒子的大小为(10.1±1.6) nm,粒度均一,单分散性好,在300 K下具有超顺磁性,饱和磁化强度为45 A·m2/kg.红外结果表明,-COO -共价结合在粒子表面.zeta电势为- 25 mV.其在水中的稳定性与以三甘醇为反应介质、高温分解法制备的纳米Fe3O4粒子作比较,表现出长时间(60d以上)的良好分散性.静电作用及空间位阻效应是其高稳定分散性的原因.
参考文献
| [1] | Hu F Q,Wei L,Zhou Z,et al.Preparation of Biocompatible Magnetite Nanocrystals for in vivo Magnetic Resonance Detection of Cancer[J].Adv Mater,2006,18:2553-2556. |
| [2] | Mejías R,Costo R,Roca A G,et al.Cytokine Adsorption/release on Uniform Magnetic Nanoparticlea for Localized Drug Delivery[J].J Contralled Release,2008,130:168-174. |
| [3] | Heymer A,Haddad D,Weber M,et al.Iron Oxide Labelling of Human Mesenchymal Stem Cells in Collagen Hydrogels for Articular Cartilage Repair,Biomatrials[J].Biomaterials,2008,29:1473-1483. |
| [4] | Li Z X,Kawashita M,Araki N,et al.Magnetite Nanoparticles with High Heating Efficiencies for Application in the Hyperthermia of Cancer[J].Mater Sci Eng,C,2010,30:990-996. |
| [5] | Chen X,Deng Z X,Li Y P,et al. Hydrothermal Synthesis and Superparamagnetic Behaviors of a Series of Ferrite Nanoparicles[J].Chinese J Inorg Chem,2002,18(5):460-464. |
| [6] | Kim E H,Lee H S,Kwak B K,et al.Synthesis of Ferrofluid with Magnetic Nanoparticles by Sonochemical Method for MRI Contrast Agent[J].J Magn Magn Mater,2005,289:328-330. |
| [7] | Cheon J,Kang N J,Lee S M,et al.Shape Evolution of Single-Crystalline Iron Oxide Nanocrystals[J].J Am Chem Soc,2003,126(7):1950-1951. |
| [8] | Chin A B,Yaacob I I.Synthesis and Characterization of Magnetic Iron Oxidnanoparticles via w/o Microemulsion and Massart's Procedure[J].J Mater Process Technol,2007,191:235-237. |
| [9] | Hyeon T,Lee S S,Park J,et al.Synthesis of Highly Crystalline and Monodisperse Maghemite Nanocrystallites without a Size-Selection Process[J].J Am Chem Soc,2001,123 (51):12798-12801. |
| [10] | Sun S H,Zeng H,Robinson D B,et al.Monodisperse MFe2O4 (M =Fe,Co,Mn) Nanoparticles[J].J Am Chem Soc,2004,127(1):273-279. |
| [11] | Xu Z C,Shen C M,Hou Y L,et al.Oleylamine as Both Reducing Agent and Stabilizer in a Facile Synthesis of Magnetite Nanoparticles Oleylamine as Both Reducing Agent and Stabilizer in a Facile Synthesis of Magnetite Nanoparticles[J].Chem Mater,2009,21 (9):1778-1780. |
| [12] | Maity D,Kale S N,Kaul-Ghanekar R,et al.Studies of Magnetite Nanoparticles Synthesized by Thermal Decomposition of Iron (Ⅲ) Acetylacetonate in Tri (ethylene glycol)[J].J Magn Magn Mater,2009,321:3093-3098. |
| [13] | Liu Q X,Xu Z H.Self-Assembled Monolayer Coatings on Nanosized Magnetic Particles using 16-Mercaptohexadecanoic Acid[J].Langmuir,1995,11:4617-4622. |
| [14] | Goncalves R H,Cardoso C A,Leite E R.Synthesis of Colloidal Magnetite Nanocrystals Using High Molecular Weight Solvent[J].J Mater Chem,2010,20:1167-1172. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%