压力作用下稳定超亲水-水下超疏油表面设计及润湿转变抑制机理研究

Superhydrophilic-underwater superoleophobic membrane is a kind of functional separation membranes based on special wettability, has a fairly bright application prospect in oil/water separation. The stability of the material is the key factor in its performance. This item will be oriented towards the aim of stable membrane with superhydrophilicity-underwater superoleophobicity design, start with molecular brush structure regulation and anisotropic structure construction. We will suppress the wetting transition by the oil penetration suppression of stable hydration shell on vertical direction and oil directional transmission of anisotropic structure on horizontal direction, reveal the relationships among molecular brush structure, anisotropic structure and wettability in three phase system of oil-water-solid, illustrate the nature of science of wetting transition and transition suppression, establish eventually the design model and stable mechanism of superhydrophilic-underwater superoleophobic surface under pressure in multiple phase system.

超亲水-水下超疏油分离膜是一种基于特殊润湿性的功能分离膜，在油水分离中具有非常好的应用前景。超亲水-水下超疏油特殊润湿性材料的稳定性是其性能发挥的关键因素。本项目以压力环境下稳定超亲水-水下超疏油分离膜设计为导向目标，从分子刷结构调控、表面各向异性结构构筑入手，基于稳定水化层纵向抗油穿透和各向异性结构横向对油定向转移的作用，实现多层次协同抑制润湿性转变，揭示油-水-固三相体系下分子刷结构和各向异性结构与静、动态润湿性能间的关系规律，阐明多相体系压力环境下分子刷结构及各向异性结构对超亲水-水下超疏油润湿性转变及抑制过程的科学本质，最终建立多相体系压力环境下超亲水-水下超疏油多层次设计和稳定理论。

超亲水-水下超疏油分离膜是一种基于特殊润湿性的功能分离膜，在油水分离中具有非常好的应用前景。超亲水-水下超疏油特殊润湿性材料的稳定性是其性能发挥的关键因素。本项目通过水热法原位构筑具有微纳米多级结构的二氧化钛针状阵列及不同官能团的超亲水涂层，系统研究了微结构及化学组成对水化层稳定性的影响，揭示油-水-固三相体系下分子刷结构和针状阵列结构与静、动态润湿性能间的关系规律，阐明多相体系压力环境下分子刷结构及微结构对超亲水-水下超疏油润湿性转变及抑制过程的科学本质，最终建立多相体系压力环境下超亲水-水下超疏油多层次设计和稳定理论。