The paper summarizes the experimental study on the physical properties such as surface tension and density of ethylene glycol based nanofluids containing titanium dioxide nanoparticles different in terms of phase: anatase phase, rutile phase and their mixture. The samples prepared using two-step method were in various mass fractions: 0.01, 0.02, 0.03, 0.04 and 0.05, without using any surfactants. During the experimental study the surface tension and mass density were measured in temperature range from 283.15 to 318.15 K. The findings exposed the effect of TiO₂ nanoparticles concentration as well as nanoparticles phase on these properties. The addition of nanoparticles to the ethylene glycol causes the increase in the value of the surface tension and density. Finally, the outcomes were compared to theoretical correlation proposed by Pak and Cho.

本文总结了含有不同相态的二氧化钛纳米粒子的乙二醇基纳米流体的表面张力和密度等物理性质的实验研究：锐钛矿相、金红石相及其混合物。使用两步法制备的样品具有不同的质量分数：0.01、0.02、0.03、0.04 和 0.05，不使用任何表面活性剂。在实验研究期间，在 283.15 至 318.15 K 的温度范围内测量了表面张力和质量密度。研究结果揭示了 TiO _2的影响纳米粒子浓度以及纳米粒子相位对这些特性的影响。将纳米颗粒添加到乙二醇中导致表面张力和密度值的增加。最后，将结果与 Pak 和 Cho 提出的理论相关性进行了比较。