微通道电渗流在微流控芯片等新兴技术领域有重要应用。随着应用中以高分子水溶液作为电渗流工质的趋势日益明显，认清微通道内高分子水溶液电渗流的机理变得尤为重要。当前国内外研究忽略了受限空间对流变特性、高分子对双电层特性的影响，从而无法获得对高分子水溶液电渗流机理的深入认识。本项目拟通过理论建模和实验测量相结合的手段对微通道内高分子水溶液电渗流进行研究。通过关注受限空间内高分子水溶液的流变特性和高分子存在时的双电层特性，构建描述相应特性的理论模型，进而建立微通道内高分子水溶液电渗流的理论模型；通过将高分子种类、浓度等诸因素作为可控变量，开展系统的微通道内高分子水溶液电渗流的实验研究，揭示其流动规律；通过比较分析理论预测和实验测量结果，深入阐明微通道内高分子水溶液电渗流的机理，并实现对电渗流理论模型的验证。本项目将深化对高分子水溶液电渗流的认识，并为相关应用提供理论指导，具有重要的学术和工程价值。

Electroosmotic flows in microchannels have important applications in emerging technologies such as microfluidic chips. With the trend of the use of aqueous polymer solutions as the working fluids for electroosmotic flows in relevant applications becoming increasingly apparent, it becomes particularly important to acquire a clear understanding of the mechanism of electroosmotic flow of aqueous polymer solutions in microchannels. The present studies at home and abroad neglect the effects of the confined space and polymer on the rheology and electric double layer respectively, and thus cannot lead to an in-depth understanding of the mechanism of electroosmotic flow of aqueous polymer solutions. This project aims to investigate the electroosmotic flow of aqueous polymer solutions in microchannels with a combined approach of theoretical modelling and experimental measurements. By focusing on the characteristics of the rheology of an aqueous polymer solution in the confined space and the electric double layer with the presence of polymer, we will construct the theoretical models corresponding to the two characteristics, and finally, establish a theoretical model for the electroosmotic flow of aqueous polymer solutions in microchannels. By setting the type and concentration of polymer and many other factors as the control variables, we perform a systematic experimental investigation of the electroosmotic flow of aqueous polymer solutions in microchannels, and uncover the law of electroosmotic flow. By doing comparative analyses of the data from both theoretical modelling and experimental measurements, we thoroughly clarify the mechanism of electroosmotic flow of aqueous polymer solutions in microchannels, and achieve the validation of the theoretical model of electroosmotic flow as well. This project would deepen the understanding of the electroosmotic flow of aqueous polymer solutions and provide theoretical guidance for relevant applications, and thus is of great academic and engineering value.