研究了无水乙醇洗涤次数对油酸包覆的Fe3O4磁性纳米颗粒表面包覆结构的影响.采用FT-IR和TGA联合表征了油酸包覆的Fe3O4磁性纳米颗粒经过无水乙醇洗涤前后表面包覆结构的变化,采用TEM观察了油酸包覆后Fe3O4磁性纳米颗粒的形貌.实验结果表明经过无水乙醇5次洗涤后,油酸包覆的Fe3O4磁性颗粒为双层包覆结构;经过无水乙醇20次洗涤后,无水乙醇将双层油酸包覆结构中的物理吸附层洗掉,造成双层油酸包覆的Fe3O4磁性颗粒演变为单层包覆结构.
参考文献
| [1] | 李德才.磁性液体理论及应用[M].北京:科学出版社,2003 |
| [2] | Nianqiang Wu;Lei Fu;Ming Su;Mohammed Aslam;Ka Chun Wong;Vinayak P. Dravid .Interaction of Fatty Acid Monolayers with Cobalt Nanoparticles[J].Nano letters,2004(2):383-386. |
| [3] | Kataby G;Cojocaru M;Prozorov R et al.Coating carboxylic acids on amorphous iron nanoparticles[J].Langmuir,1999,15(05):1703-1708. |
| [4] | Doina Bica;L. Vekas;M. Rasa .Preparation and magnetic properties of concentrated magnetic fluids on alcohol and water carrier liquids[J].Journal of Magnetism and Magnetic Materials,2002(1/3):10-12. |
| [5] | Zheng WM;Gao F;Gu HC .Magnetic polymer nanospheres with high and uniform magnetite content[J].Journal of Magnetism and Magnetic Materials,2005(0):403-410. |
| [6] | Qiang Lan;Chao Liu;Fei Yang .Synthesis of bilayer oleic acid-coated Fe3O4 nanoparticles and their application in pH-responsive Pickering emulsions[J].Journal of Colloid and Interface Science,2007(1):260-269. |
| [7] | Shen L F;Laibinis P E;Hatton T A .Bilayer surfactant stabilized magnetic fluids:Synthesis and interactions at interfaces[J].Langmuir,1999,15(02):447-453. |
| [8] | Xiaoqiao Liu;Michael D. Kaminski;Yueping Guan .Preparation and characterization of hydrophobic superparamagnetic magnetite gel[J].Journal of Magnetism and Magnetic Materials,2006(2):248-253. |
| [9] | L. Shen;P.E. Laibinis .Aqueous magnetic fluids stabilized by surfactant bilayers[J].Journal of Magnetism and Magnetic Materials,1999(1/3):37-44. |
| [10] | Tao Y T .Structural comparison of self-assembled monolayers of n-alkanoic acids on the surfaces of silver,copper,and aluminum[J].Journal of the American Chemical Society,1993,1,20(10):4350-4358. |
| [11] | V.V.Korolev;A.G.Ramazanova;A.V.Blinov .Adsorption of surfactants on superfine magnetite[J].Russian Chemical Bulletin,2002(11):2044-2049. |
| [12] | Nianqiang Wu;Lei Fu;Ming Su;Mohammed Aslam;Ka Chun Wong;Vinayak P. Dravid .Interaction of Fatty Acid Monolayers with Cobalt Nanoparticles[J].Nano letters,2004(2):383-386. |
| [13] | Yanzhi Ren;Ken-ichi Iimura;Teiji Kato .Structure of Barium Stearate Films at the Air/Water Interface Investigated by Polariztion Modulation Infrared Spectroscopy and #pi#-4 Isotherms[J].Langmuir: The ACS Journal of Surfaces and Colloids,2001(9):2688-2693. |
| [14] | 赵国玺.表面活性剂物理化学[M].北京:北京大学出版社,1991 |
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%