摘要
制备了氧化铝R141b基纳米流体,通过粒度和沉降分析研究了合成条件对产物粒径及稳定性的影响。用响应曲面法及中心复合设计原理,建立超声振荡时间、磁力搅拌时间、氧化铝体积分数及三者间交互作用对氧化铝R141b基纳米流体稳定性影响的多元二次回归方程。结果表明:制备氧化铝R141b基纳米流体,以稳定时间最大为目标条件时,最佳选择性优化条件为超声振荡时间60min、磁力搅拌时间60min、氧化铝百分占比0.06%,最佳条件下预测稳定时间为17.667d。与验证实验中稳定时间平均值17.6d相比,二者偏差较小,表明模型准确,优化方案可信。
In this work,Al2O3-R141b nanofluidsis prepared for the study of the effect of synthesis condition on naaofluidsstabiiity by particle sizeanalysis andsettling analysis. We set up a multiple quadratic regression equation- based on the influence of stability of Al2O3-R141b nanofluidsby response surface method and the principleof central composite design. These influencing factors are composed of sonication ripening time,magnetic stirring time, nanopar- ticle loadingsand their combination. With the goal of maximizing the stable time condition, the best selective condition are as follows： sonication ripening time is 60 minutes, magnetic stirring time is 60 minutes, nanoparticle loadings is ac- counted for 0. 06%, the stable timewas 17. 667 days in the case of the best condition. Compared to the average time （17. 7 days） of confirmatory experiment, there is a small error, we can confirm the model is accurate and the optimiza- tion scheme is credible.
基金
国家自然科学基金(51566005
51064015)
