项目名称: 基于离子液体的高分子溶液NIPS机理和微孔膜绿色成膜方法
项目编号: No.51303065
项目类型: 青年科学基金项目
立项/批准年度: 2014
项目学科: 一般工业技术
项目作者: 代正伟
作者单位: 嘉兴学院
项目金额: 25万元
中文摘要: "湿法成膜"技术中有机溶剂的挥发和排放所导致的大气及水体污染,是分离膜与合成革行业亟待解决的重大问题。为此本课题提出以低挥发性、高溶解能力的离子液体替代传统有机溶剂,建立绿色成膜方法。其核心理论问题为:针对基于离子液体的高分子溶液这一新的溶液系统,建立相平衡与相分离溶液理论,特别是离子液体/高分子体系NIPS(非溶剂致相分离)过程的理论模型。以聚氨酯为模型高分子,在分子层面,运用计算与实验手段相结合,研究离子液体基元与高分子链之间的相互作用;对NIPS过程,则针对相图与传质状况在热力学和动力学两方面对其相分离机制展开讨论,综合形成系统化NIPS理论模型。以此为基础,建立基于离子液体的绿色成膜方法,总结影响膜孔结构的控制因素。课题研究成果将是对离子液体理论和高分子溶液理论的进一步丰富。所建立的微孔膜绿色制备工艺,有望克服传统有机溶剂的环境污染问题,因而具有重要的经济社会价值。
中文关键词: 聚氨酯;微孔膜;离子液体;;
英文摘要: The immersion precipitation phase-inversion method in the membrane industry can lead to serious environmental pollution to the air and water, due to the large-amount emission of organic solvents. To solve this problem, we take the ionic liquids as a replacement of the traditional organic solvents, and present a new environmental-friendly membrane preparation method in this project. The basic theoretical challenge is to construct a new macromolecular solution theory that is applicable to the new solution system of ionic liquids and macromolecules, and to set up the theoretical modal for their NIPS (Nonsolvent Induced Phase Separation) process. Polyurethane is taken as the example polymer. In the molecular scale, the interactions among the chemical groups of ionic liquid and polymer chains are to be investigated by a combination of both simulation and experimental methods; while for the NIPS process, the mechanism is to be discussed by phase diagrams and mass transfer kinetics. Based on the theoretical modals, the membrane preparation method is to be optimized and the relationship between the membrane morphology and the preparation parameters as well as the material chemical structures is to be discussed. The achievement of this project will enrich the theories in the fields of both ionic liquid and macromolecula
英文关键词: PU;Microporous Membrane;Ion liquid;;