Preparation, characterization and application of bilayer surfactant-stabilized ferrofluids

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	Preparation, characterization and application of bilayer surfactant-stabilized ferrofluids
	Hong, R. Y.; Zhang, S. Z.; Han, Y. P.; Li, H. Z.; Ding, J.; Zheng, Y.
刊名	POWDER TECHNOLOGY
	2006-11-30
卷号	170 期号:1 页码:1-11
关键词	Fe3O4 magnetic nanoparticles (MNPs) ferrofluids (FFs) magnetic fluids (MFs) bilayer surfactant rheology
ISSN号	0032-5910
其他题名	Powder Technol.
中文摘要	Fe3O4 magnetic nanoparticles (MNPs) were prepared by the coprecipitation of Fe2+ and Fe3+ using ammonium hydroxide (NH4OH) as precipitating agent. Transmission electronic microscopy (TEM) showed that the particle-size is around 10 nm. X-ray powder diffraction (XRD) indicated the sole existence of inverse cubic spinel phase of Fe3O4. The surface of MNPs was coated with oleate sodium as the primary layer and polyethylene glycol 4000 (PEG-4000) as the secondary layer to improve the stability of water-based ferrofluids (FFs). The dosages of oleate sodium and PEG-4000 were found to have an important effect on increasing the solid content. Gouy magnetic balance showed that the saturation magnetization could be as high as 1.44 x 10(5) A/m. Laser particle-size analyzer determined the aggregate size in FFs. The Fe3O4 MNPs did not change through the preparation of FFs. Differential scanning calorimetry-thermogravimetry (DSC-TG) and Fourier transform infrared spectroscopy (FT-IR) analysis showed existence of two distinct surfactants on the particle surface. The concentrated and diluted FFs were characterized by UV-vis spectrophotometer and excellent stability was found. The rheological measurements indicated that viscosity increased with the increase of solid content and applied magnetic field, but decreased with the increase of temperature. The FFs showed the non-Newtonian behavior of shear-thinning when the solid content was high. The mechanical properties of polyvinylalcohol (PVA) thin film can be greatly improved by adding Us. (c) 2006 Elsevier B.V. All rights reserved.
英文摘要	Fe3O4 magnetic nanoparticles (MNPs) were prepared by the coprecipitation of Fe2+ and Fe3+ using ammonium hydroxide (NH4OH) as precipitating agent. Transmission electronic microscopy (TEM) showed that the particle-size is around 10 nm. X-ray powder diffraction (XRD) indicated the sole existence of inverse cubic spinel phase of Fe3O4. The surface of MNPs was coated with oleate sodium as the primary layer and polyethylene glycol 4000 (PEG-4000) as the secondary layer to improve the stability of water-based ferrofluids (FFs). The dosages of oleate sodium and PEG-4000 were found to have an important effect on increasing the solid content. Gouy magnetic balance showed that the saturation magnetization could be as high as 1.44 x 10(5) A/m. Laser particle-size analyzer determined the aggregate size in FFs. The Fe3O4 MNPs did not change through the preparation of FFs. Differential scanning calorimetry-thermogravimetry (DSC-TG) and Fourier transform infrared spectroscopy (FT-IR) analysis showed existence of two distinct surfactants on the particle surface. The concentrated and diluted FFs were characterized by UV-vis spectrophotometer and excellent stability was found. The rheological measurements indicated that viscosity increased with the increase of solid content and applied magnetic field, but decreased with the increase of temperature. The FFs showed the non-Newtonian behavior of shear-thinning when the solid content was high. The mechanical properties of polyvinylalcohol (PVA) thin film can be greatly improved by adding Us. (c) 2006 Elsevier B.V. All rights reserved.
WOS标题词	Science & Technology ; Technology
类目[WOS]	Engineering, Chemical
研究领域[WOS]	Engineering
关键词[WOS]	MAGNETIC FLUIDS ; FE3O4 NANOPARTICLES ; SIZE ; OPTIMIZATION ; PARTICLES
收录类别	SCI
原文出处	://WOS:000242635500001
语种	英语
WOS记录号	WOS:000242635500001
公开日期	2013-10-24
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.ipe.ac.cn/handle/122111/4054]
专题	过程工程研究所_研究所（批量导入）
作者单位	1.Soochow Univ, Dept Chem Engn, Suzhou 215123, Peoples R China 2.Soochow Univ, Key Lab Organ Synthesis, Suzhou 215123, Peoples R China 3.Chinese Acad Sci, State Key Lab Multiphase React, Inst Proc Engn, Beijing 100080, Peoples R China 4.MSC Software Corp, Santa Ana, CA 92707 USA 5.Univ New Brunswick, Dept Chem Engn, Fredericton, NB E3B 5A3, Canada
推荐引用方式 GB/T 7714	Hong, R. Y.,Zhang, S. Z.,Han, Y. P.,et al. Preparation, characterization and application of bilayer surfactant-stabilized ferrofluids[J]. POWDER TECHNOLOGY,2006,170(1):1-11.
APA	Hong, R. Y.,Zhang, S. Z.,Han, Y. P.,Li, H. Z.,Ding, J.,&Zheng, Y..(2006).Preparation, characterization and application of bilayer surfactant-stabilized ferrofluids.POWDER TECHNOLOGY,170(1),1-11.
MLA	Hong, R. Y.,et al."Preparation, characterization and application of bilayer surfactant-stabilized ferrofluids".POWDER TECHNOLOGY 170.1(2006):1-11.