摘要
采用均匀设计法对利用两步法制备的氧化铝纳米流体进行了稳定分析。将悬浮液的zeta电位作为氧化铝纳米流体稳定性的衡量指标。在实验中,选择了四个因素,分别为纳米流体的浓度、分散剂的浓度、pH值、超声震荡时间,并对这四个因素都取了12个水平,这样的实验设计可以系统地反映出各个因素如何影响氧化铝纳米流体的稳定性。随后通过对实验结果进行回归分析,得到了关于这四个因素与纳米流体zeta电位的方程式,并分析得出悬浮液的pH值和超声震荡时间对纳米流体稳定性起着非常重要的作用。最后找到了在实验范围中的最佳纳米流体溶液的配方,并按此配方配制纳米流体,测得实际zeta电位值与预测值吻合较好。
The stability of Al2O3 nano-fluid prepared by two-step method with the uniform design method was investigated.The zeta potential of suspension was treated as the index of the stability of Al2O3 nano-fluid.In the experiment,four factors were chosen,which were the concentration of Al2O3 nano-fluids,concentration of the dispersant,pH values of Al2O3 nano-fluids,ultrasonic vibration time and each factor took 12 levels.This experimental design can systematically reflect how each factor affects the stability of Al2O3 nano-fluids.Subsequently the equation about the relation of these four factors and the zeta potential of suspension was obtained through the regression analysis on the experimental results.The pH value of suspension and ultrasonic vibration time played a very important role in the stability of Al2O3 nano-fluid by analyzing the equation.Finally,the best compound mode of these four factors in the experimental range was found,and the actual zeta potential values perfectly matched with the expected zeta potential values of the suspension prepared by this compound mode.
出处
《能源工程》
2010年第2期11-14,19,共5页
Energy Engineering
基金
国家"863"资助项目(2007AA05Z254)
