Synthesis, characterization and magnetorheological study of 3-aminopropyltriethoxysilane-modified Fe3O4 nanoparticles

被引:54
作者
Wang, Guangshuo [1 ]
Ma, Yingying [1 ]
Tong, Yu [2 ]
Dong, Xufeng [2 ]
机构
[1] Hebei Univ Engn, Coll Equipment Mfg, Handan 056038, Peoples R China
[2] Dalian Univ Technol, Sch Mat Sci & Engn, Dalian 116024, Peoples R China
关键词
Fe3O4; nanoparticles; 3-aminopropyltriethoxysilane; sonochemical; magnetorheological properties; IRON-OXIDE NANOPARTICLES; SUSPENSIONS; BEHAVIOR;
D O I
10.1088/0964-1726/25/3/035028
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
In this study, monodisperse Fe3O4 nanoparticles were synthesized successfully using a sonochemical method in the presence of 3-aminopropyltriethoxysilane (APTES). The morphology, microstructure and magnetic properties of the bare Fe3O4 and APTES-coated Fe3O4 were investigated in detail by TEM, XRD, FTIR and SQUID. It was found that APTES-coated Fe3O4 showed relatively good. dispersion with a. narrow size distribution of 8.4 +/- 2.1 nm. diameter. The functionalization of Fe3O4 was proved to be covalent linking between Fe3O4 and APTES. The field-dependent magnetization curve indicated superparamagnetic behavior of Fe3O4-APTES with a saturation magnetization (Ms) of 70.5 emu g(-1) at room temperature. A. magnetorheological (MR) fluid was prepared using the obtained Fe3O4-APTES nanoparticles with 25 wt% particles, and its MR properties were. tested using. a Physica MCR301 rheometer fitted with an MRmodule. The results showed that the as-prepared APTES-coated Fe3O4 nanoparticle-based MR fluid exhibited typical MR effects, with increasing viscosity, shear stress and yield stress depending on the applied magnetic field strength.
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页数:7
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