油基TiO_(2)纳米流体的制备及流变性研究  

Preparation and rheological properties of oil-based TiO_(2) nanofluids

作　　者：侯献军[1] 苏达 王友恒 叶心雨 江华 HOU Xianjun;SU Da;WANG Youheng;YE Xinyu;JIANG Hua(School of Automotive Engineering,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]武汉理工大学汽车工程学院,武汉430070

出　　处：《功能材料》2022年第9期9147-9153,共7页Journal of Functional Materials

基　　金：国家自然科学基金项目(51875423)。

摘　　要：采用“两步法”制备了稳定性良好的油基TiO_(2)纳米流体,并使用旋转黏度计对纳米流体黏度和剪切应力进行了测量,探究了黏度计剪切速率、纳米颗粒浓度以及温度对纳米流体黏度的影响。结果表明,纳米TiO_(2)流体具有剪切变稀的特性,随温度升高该特性逐渐减弱,同时其黏度随浓度的增加而增大,随温度的上升以指数形式迅速减小。通过对实验数据的分析,并结合传统指数型粘温关系式,提出了涉及温度和颗粒浓度的油基TiO_(2)纳米流体黏度计算经验公式。Oil-based TiO_(2) nanofluids with good stability were prepared by the two-step method.The rheological properties of nanofluids were studied by rotational viscometer,and the effects of shear rate,nanoparticle concentration and temperature on the viscosity of nanofluids were investigated.The results show that the viscosity of TiO_(2) nanofluid increases with the increase of concentration,and decreases exponentially with the increase of temperature.Combined with the experimental data,an empirical formula for calculating the viscosity of oil-based TiO_(2) nanofluid was developed.

关 键 词：纳米流体 流变性 黏度 温度 

分 类 号：TK124[动力工程及工程热物理—工程热物理]