α-Fe_2O_3/水纳米流体分散稳定性研究  

Dispersion Stability Analysis of α-Fe_2O_3-Water-Based Nanofluid

作　　者：许强辉[1] 昝成[2] 江海峰[1] 史琳[1] 

机构地区：[1]清华大学热科学与动力工程教育部重点实验室,北京100084 [2]中国石油勘探开发研究院提高石油采收率国家重点实验室,北京100083

出　　处：《工程热物理学报》2013年第11期2006-2010,共5页Journal of Engineering Thermophysics

基　　金：教育部博士点基金项目(No.20110002110088)

摘　　要：本文针对α-Fe_2O_3/水纳米流体分散稳定性开展了实验研究和理论分析.根据不同分散机理,选择了两种分散剂:柠檬酸铵AC及阿拉伯树胶GA;通过两步法可控制备纳米流体;采用目视沉降法、紫外可见分光光度法、粒度分析以及Zeta电位分析对纳米流体分敞稳定性进行实验评价;并总结实验规律,研究了不同分散体系的特征及分散剂的作川机制,形成金属纳米流体分散稳定性理论分析体系.Experimental and theoretical studies were performed for the stability of nanofluid produced by dispersion of oz-Fe203 in water. Two kinds of dispersants based on different dispersion mechanism were selected, namely Ammonium citrate （AC） and Gum arabic （GA）. The nanofluid was prepared by two-step method. The stability of nanofluid was then investigated by Sediment photograph capturing, UV-Vis spectrophotometer, Dynamic light scattering and Zeta potential test. The results were analyzed by colloid theory to research the characteristic and mechanism of different dispersion system. Finally, a theoretical evaluation system was proposed to analyze the dispersion stability of metal nanofluid.

关 键 词：纳米催化剂 纳米流体 分散稳定性 分散剂 

分 类 号：TK123[动力工程及工程热物理—工程热物理]