中文摘要：

为了了解微纳米间隙中流体的流动特性,采用原子力显微镜对微纳米间隙中的固体和液体边界滑移进行了实验研究,主要研究了液体润滑剂的黏度对边界滑移的影响。实验中采用的固体样品为SiO2,液体样品为两种不同黏度的季戊四醇油酸酯,分子式为C77H140O8,黏度分别为32mm^2/s和150mm2/s。采用相对速度法对实验数据进行了处理,结果表明,不同黏度的季戊四醇油酸酯和SiO2表面作用时都会发生边界滑移,黏度大,产生的滑移大。其原因是,随着黏度升高,邻近固体表面的液体分子与和固体表面相接触的液体分子之间的剪切力增大,可更加容易地克服固液界面间的作用力,更加容易产生边界滑移。

英文摘要：

In order to study fluid flow characteristics of the micro-nano gap,the boundary slip in micro-nano gap was studied using atomic force microscope, mainly from the standpoint of liquid vis- cosity. The solid sample was SiO2 ,the liquid sample was pentarythriol oleate with different viscosity, their molecular formula are C77 H14008 ,their viscosity were 32 mm^2/s and 150 mm^2/s,respectively. U- sing the relative velocity method processed the test results, as the results shown,two different types of pentaerythritol oleate on the face of SiO2 both have boundary slip,the boundary slip increases with in- creasing of liquid viscosity. The reason is shown as follow, with the viscosity increasing, the shear force which will increase between nearing the solid surface liquid molecules and contacting with solid surface liquid molecules, so that solid-liquid force is easy to overcome, easy to generate boundary slip.