本文采用液滴铺展法和Wilhelmy吊片法开展了不同浓度的PEG400+SiO2纳米颗粒的非牛顿流体在盖玻片上动态湿润特性的研究,这类纳米流体流变性复杂,随着剪切速率的增大,其黏度从弱剪切稀化到强剪切增稠再到强剪切稀化的特征.本文通过对比两种实验方法获得的θD-U实验数据,发现三相接触线形状对此类复杂流变流体的θD-U呈现一定影响.通过分析其流变性和动态湿润特性的变化规律,从理论上分析了三相接触线形状影响复杂流体动态湿润的原因,并从微观上分析了角区控制动态湿润过程的关键.“,”This work study the dynamic wetting behavior of three PEG400+SiO2 nanofluids by both sessile drop method and Wilhelmy plate method.The rheology of the test fluids are complex and the shape of the three phase contact line are different for the two experiment method.The θD-U curves got by the two different methods are compared each other.It is found that the shape of the contact line plays an important role on the dynamic wetting process for the test fluids with complex rheology,which is different for Newtonian fluids.In this work,the mechanism of the influence is analyzed by compare the rheology and θD-U relationship.