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中文摘要：
本文以纳米冷冻油为研究对象,通过沉降观察和分光透射比实验对几种非离子表面分散剂进行了优选,研究发现,当分散剂的亲水亲油平衡值在3～6范围时效果最佳。分散剂浓度对纳米冷冻油的稳定性影响较大,随着分散剂浓度的增加,纳米冷冻油的分散越稳定。在小配比分散剂浓度下,分散剂的加入对纳米冷冻油的黏度影响很小。利用TiO2纳米冷冻油的黏度实验数据,比较了几种纳米流体黏度模型,并拟合了TiO2纳米冷冻油的黏度公式,通过黏度公式预测TiO2纳米颗粒团聚体的直径为原始颗粒的14.4倍。
英文摘要：
In this paper,several non-ionic surfactants were optimized and selected through sedimentation observation and the light transmittance ratio method in the experimental investigation on the nano-lubricant.The results show that,when the hydrophile-lipophile balance（HLB） value of dispersant is from 3 to 6,the effect of dispersion is the best.Dispersant concentrations impact the stability of nano-lubricant greatly.With the increase of the dispersant concentrations,the dispersion of nano-lubricant becomes more stable.For TiO_2 nano-lubricant,the minimum dispersant concentration is 0.3%mass fraction.In a small proportion of dispersant concentration,the addition of dispersant has little effect on the nano-lubricant viscosity.Using TiO_2 nano-lubricant viscosity experimental data,several kinds of nanofluid viscosity models were compared.An experimental viscosity formula was fitted,through which TiO_2 nanoparticle aggregates was predicted to be 14.4 times of that of the original particle.
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