表面上液滴欲移动时所表现出的滞后现象尚未在理论上得到完全解决,其中液滴所受到的滞后阻力的分析和计算是定量描述此滞后现象的关键问题之一。本文应用高速摄像,实验研究了亲/疏水表面上液滴的滞后阻力,并依据相应的实验数据对滞后阻力进行了分析和验证。结果表明：液滴在亲水和疏水表面上运动时所受到的滞后阻力分别与铺展功和黏附功相对应。滞后阻力反映了液滴在亲/疏水表面上出现滞后现象的本质,同时对于进一步研究接触角滞后提供了理论基础。%The hysteresis phenomenon of droplet moving on surfaces has not yet been fully explained theoretically,and the analysis and calculation of the hysteretic force of a droplet is one of the key points to quantitatively describe the hysteresis phenomenon.By means of high speed camera,the hysteretic force of a droplet on hydrophilic and hydrophobic surface was studied and further verified by experimental data.The results indicate that the hysteretic forces of droplets moving on hydrophilic and hydrophobic surfaces are corresponding to spreading and adhesion respectively.The hysteretic force can explain hysteresis phenomenon and provides a theory basis for furthering research on contact angle hysteresis（CAH）.
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