当前燃油滤纸普遍存在孔径大、分离精度低的缺陷，无法高效去除燃油中的乳化水，易导致发动机锈蚀、喷油嘴堵塞等问题，难以满足发动机对高效燃油滤纸的迫切需求。本项目拟研究纳米蛛网堆叠膜的成型边界条件及其复合滤纸的可控构筑，明晰复合滤纸的孔道结构及润湿性的协同作用对乳化水分离性能的影响规律，从而获得具有高分离效率的燃油滤纸。近期申请者利用静电雾化液滴的相分离成网，初步获得了纳米蛛网复合滤纸，但其蛛网结构仍存在缺陷导致其乳化水分离性能未达到实际应用需求。本项目将开展纳米蛛网复合滤纸的可控构筑及其油/水乳液分离性能的优化研究，揭示纳米蛛网成型机制及其复合滤纸结构的调控规律，阐明复合滤纸微纳梯度孔道中的乳化水聚结破乳及油相渗流机制，明晰纳米蛛网复合滤纸的本体结构与应用性能间的内在关联，实现其高渗油通量（≥3000Lm-2h-1）条件下乳化水分离效率≥99.4%的目标，以满足其在燃油纯化领域的应用需求。

The current fuel paper with disadvantages of large pore size and low separation precision is incapable for the removing of emulsified water leading to serious engine corrosion, fuel nozzle blockage and other issues, which could not satisfy the requirements of the engine. Herein, we will investigate the boundary conditions of the formation of stacking nano-web membrane and the controllable construction of its composite filter paper, and reveal the influence of the synergistic effect of channels and wettability for the emulsified water separation performance, finally to obtain the fuel paper with high separation efficiency. Recently, we have preliminary prepared nano-web composite fuel paper via regulating the phase separation of electrostatic atomized droplets. However, its current performance can not fulfill the practical application requirements yet due to the defects of the nano-web. Consequently, we will study the controllable fabrication and oil/water emulsion separation performance optimization of the nano-web composite fuel paper, reveal the mechanism of the formation of the nano-web and structure regulation of fuel paper, as well as clarify the mechanism of emulsion coalescence-demulsification and oil percolation in the micro-nanoscaled gradient channels. Moreover, we will investigate the relationship between the bulk structure and application performance, achieving the target of separation efficiency ≥ 99.4% with a high flux ≥ 3000 L m-2 h-1, to fulfill the practical application in fuel purification.