高等学校化学学报2012，Vol.33Issue(1)：206-209,4.DOI:10.3969/j.issn.0251-0790.2012.01.035
无溶剂Fe3O4纳米流体的制备及表征
Preparation and Characterization of Solvent-free Fe3O4 Nanofluids
摘要
Abstract
The surfactant was used to functionalize the nanoparticles to prepare solvent-free nanofluids. To prevent Fe3O4 nanoparticles from agglomerating and improve the dispersion of Fe3O4 nanoparticles, the solvent-free Fe3O4 nanofluids were synthesized through surface modification. Magnetic Fe3O4 nanoparticles were firstly prepared by chemical co-precipitation method. Then graft the quaternary ammonium salt (CH3O)3Si(CH2)3N+(CH3)2(C18Hj7)C1-, which has silanol groups, on Fe3O4 nanoparticles with hydroxyl groups. Finally, the chloridion was replaced with the anion C9H19-C6H4(OCH2CH2)200(0112)3503 through an ion-exchang process. An organic layer was formed on the surface of Fe3O4 nanoparticles, and made the Fe3O4 nanoparticles from black powder to brown fluid ( at room temperature). The solvent-free Fe3O4 nanofluids were characterized by X-ray diffraction, Fourier transform infrared spectrum, differential scanning calorimetry, thermogravimetric analysis, transmission electron microscopy and rheometer. The Fe3O4 nanoparticles were monodispersed in solvent-free nanofluids, and the content of Fe3O4 nanoparticles in the nanofluids proved to be about 12%. The loss shear modulus G" was higher than the storage shear modulus G1.关键词
无溶剂纳米流体/表面改性/Fe3O4纳米粒子Key words
Solvent-free nanofluid/ Surface modification/ Fe3O4 nanoparticles分类
化学化工引用本文复制引用
檀雨默,郑亚萍,兰岚..无溶剂Fe3O4纳米流体的制备及表征[J].高等学校化学学报,2012,33(1):206-209,4.基金项目
国家自然科学基金(批准号:51073129)、航空基金(批准号:2010ZF53060)及西北工业大学研究生创业种子基金(批准号:Z2011012)资助. （批准号:51073129）
