基于增强型FEP中空纤维膜表面及界面微尺度梯度调控机理研究

本项目面向废油（润滑油和煤油、柴油、汽油以及苯类、卤代烃等油性化合物）再生（除杂脱水）和环保需求，从高分子加工原理出发，根据热力学相容性理论和化学纤维皮/芯复合纺丝原理，以增强界面层分离膜理论为基础，发挥碳吸附与膜分离协同作用，研究集高强度和高分离精度于一体的增强型FEP中空纤维膜，重点构筑疏水、耐热、耐油污、耐化学试剂的多尺度微纳结构表面分离层，建立从增强体到外表面多级微孔结构的梯度分布，阐明成膜体系组成、增强体结构、复合成形、操作温度和压力等对膜结构与性能影响；建立油品传质与分离模型关系以及高效膜油污染清洗方法；实现中空纤维膜平均孔径0.01～2.0μm范围可控，除水除杂率大于99.99%以上目标，为规模开发面向废油再生的新一代增强型中空纤维膜提供科学依据和技术支撑。

This project is aiming at the regeneration (impurity removal and dehydration) of used oil (lubricating oil, kerosene, diesel oil, gasoline and oily compounds like benzene, halogenated hydrocarbons) and environmental protection. Based on the principles of polymer processing, thermal dynamic theory and shear-core spinning , the reinforced FEP hollow fiber membrane with high-strength and separation accuracy would be designed by the synergistic effect of carbon adsorption and membrane separation. The project focuses on designing a micro-nano structure surface separation layer that is hydrophobic, thermal-resistance, oil-resistance, and chemical-resistance etc., in order to establish a gradient distribution of multi-level microporous structure. The influences of membrane composition, support structure, forming technology, operating temperature and pressure on the membrane structure and performance are evaluated in detail. The relationship between oil mass transfer and separation model, and the efficient and low-cost cleaning method of membrane oil pollution were established, respectively.The average pore diameter of hollow fiber membrane will be controllable in the range of 0.01 ~ 2.0μm, and the water and impurity removal rate will be more than 99.99%. The project will provide a scientific basis for the large-scale development of novel reinforced perfluorinated polymer hollow fiber membrane for used oil regeneration.