【摘要】 本研究采用高温分解法制备Fe3O4磁性纳米粒子,并对其进行表面修饰,使其能够分散在乙醇中形成磁流体。将磁流体与去离子水同时注入Y型微通道中,分别在有/无磁场的情况下,利用CCD对两种液体在低雷诺数(Re=1.0)条件下的混合情况进行了观察和分析。实验结果表明在磁场强度约为300Gs的条件下,两种液体在1.2mm处即实现了充分混合,液体发生充分混合的距离显著缩短。更多还原

【Abstract】 Fe3O4 magnetic nanoparticles were prepared by thermal-decomposition method. After surface modification, the nanoparticles could be dispersed in ethanol and the mixture formed ferrofl uids. The ferrofl uids and water were injected in Y-shape microchannel simultaneously. Under the condition of low Reynolds number(Re=1.0), the mixing situation of two liquids in/without the magnetic fi eld was observed and analyzed using CCD. The results showed that in the condition of magnetic intensity around 300 Gs, two liquids fully mixed at 1.2mm. The mixing length is largely reduced in the magnetic fi eld.更多还原