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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。
In this study, Fe3O4 magnetic nanoparticles were prepared by pyrolysis method and surface modified to make them disperse in ethanol to form magnetic fluid. The magnetic fluids and deionized water were simultaneously injected into the Y-shaped microchannels. The mixing of the two liquids under low Reynolds number (Re = 1.0) was observed and analyzed by CCD with and without magnetic field respectively . Experimental results show that under the conditions of a magnetic field strength of about 300Gs, the two liquids are fully mixed at 1.2mm, and the mixing distance of the liquid is significantly shortened.