中文摘要：

通过微管道流动试验，探讨疏水纳米SiO2的降压增注机理。在微尺度流动中，由于表面积／体积非常大，液固界面性质对流动有很大影响。在不同管壁界面条件下，用超纯水在内径约为25μm的毛细管内进行流动特性试验。结果表明：相同压力下，经过油基疏水纳米SiO2试剂处理后，水在微管中的流量有了较明显地提高；疏水纳米SiO2吸附能够使微管管壁具有超疏水性，从而产生水流滑移效应，达到减阻增流效果。

英文摘要：

The mechanism of decompression and augmented injection with hydrophobic nanoparticles SiO2 adsorbing method was studied based, on microchannel flow experiments. Due to the large ratio of surface area and volume in microscale flow, the property of liquid-solid interface has a considerable effect on the flow. The flow characteristics experiment was done using ultrapure water through a capillary with inner diameter of near 25 μm under the different boundary conditions of the micro-channel wall. The results show that the flow rate of water was increased considerably due to the reduction of flowing resistance under the same pressure in the microchannel absorbed by oil based hydrophobic nanoparticles SiO2. The wettability of micro-channel wall was transformed from hydrophilicity into stronger hydrophobicity, then the slip effect appears and the flow resistence was reduced.