膜分离作为一种节能高效的油水分离技术，在含油废水处理中具有广阔应用前景。然而基于“多步分体化构筑”的油水分离膜存在涂层均匀性差、易脱落及制备工艺繁琐等弊端。本项目拟采用光固化3D打印策略，一步构筑具有微纳多级结构一体化的超亲水/水下超疏油膜，并探究其油水分离性能及机理。首先将壳聚糖(CS)分别通过酰化接枝和微波碳化-超声氧化/酯化接枝，可控转化为具有光致聚合性能的甲基丙烯酸化壳聚糖(CS-MA)和甲基丙烯酸化氧化石墨烯纳米粒子(nGO-MA)，将其复合后制备出可用于构筑膜表面微纳多级结构的生物基光敏树脂，探究二者双键接枝密度、粒径及组分配比对光敏树脂关键物性的作用机制；基于此，3D打印“一体化”膜，借助Wenzel和Cassie经典润湿模型揭示其油水分离机理，阐明膜微观结构对油水分离性能的影响规律。课题将为高性能油水分离膜的结构设计提供理论指导，为生物质原料的绿色高值化利用开辟新思路。

Membrane separation as an efficient and energy-saving oil/water separation technology, has shown great potentials in the treatment of waste oil contaminants. However, the traditional oil/water separation membrane prepared via the multiple step and split construction strategy have some problems, such as coating inhomogeneity and easily peeled off , and complex preparation process. Herein, this project aims to prepare the superhydrophilic/underwater superoleophobic membrane with integrative micro/-nano hierarchical structure through the one-step photocuring 3D printing technology. Also this project aims to explore its oil/water separation performance and the related mechanism. First, the hydrophilic chitosan (CS) will be transformed into the photopolymerizable methacrylated chitosan(CS-MA) and methacrylated nanographene oxide dots (nGO-MA) respectively via the acylation and the microwave-assisted carbonization-ultrasonic oxidation/esterification process. Then the above two products will be combined to prepare the biobased photosensitive nGO-MA/CS-MA resin, which is able to build the micro/-nano structure on the membrane surface. The influence of grafting density, particle size and component ratio towards the key properties of the resin will be discussed. Based on that, the integrative nGO-MA/CS-MA membrane will be developed by the photocurable 3D printing. The oil/water separation mechanism will be revealed by using the classical Wenzel and Cassie models. Also the influence of the microstructure towards the oil/water separation performance will be explored. The project will provide theoretical guidance for the structural design of high-performance oil/water separation membranes and open up new ideas for the green and high-value utilization of biomass raw materials.