绿色热致相熔融纺丝工艺制备PVDF中空纤维膜成膜机理研究

项目名称： 绿色热致相熔融纺丝工艺制备PVDF中空纤维膜成膜机理研究

项目编号： No.51273147

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 一般工业技术

项目作者： 刘振

作者单位： 天津工业大学

项目金额： 76万元

中文摘要： 聚偏氟乙烯（PVDF）中空纤维膜工业化生产中需要大量有机溶剂，环境污染和原材料浪费十分严重。本项目以PVDF为膜材料，使用离子液体替代有机溶剂作为稀释剂，采用热致相熔融纺丝工艺研制新型高性能PVDF中空纤维膜，并对热致相熔融纺丝工艺制备PVDF中空纤维膜成膜机理进行研究，探索制膜过程中膜微孔结构的设计、构建、重组及优化机制。离子液体价格昂贵，采用中空纤维纳滤膜对离子液体进行回收再利用，研究中空纤维纳滤膜微观结构、纺丝废水中离子液体浓度和组成、流体的流动状况等因素对传质性能的影响，在实验研究的基础上，建立描述离子液体通过中空纤维纳滤膜的传质模型，并探索中空纤维纳滤膜回收纺丝废水中离子液体传质机理。对以离子液体作为稀释剂的绿色热致相熔融纺丝工艺制备PVDF中空纤维膜成膜机理进行研究，可以为高性能高分子分离膜制备提供理论基础和技术支持。

中文关键词： 聚偏氟乙烯；离子液体；绿色热致相分离；熔融纺丝；中空纤维膜

英文摘要： Polyvinylidene fluoride (PVDF) hollow fiber membranes production process requires a large amount of organic solvent, environmental pollution and the waste of raw materials is very serious. PVDF hollow fiber membranes will be prepared by thermally induced phase melt spinning technology which takes PVDF as membrane material and uses ionic liquids to replace organic solvent as diluents in this study. The membrane formation mechanism of thermal induced phase melt spinning process for preparation of PVDF hollow fiber membrane will be researched, and the membrane microporous structure design, construction, reorganization and optimization mechanism will be explored in the membrane making process. Ionic liquids are expensive，so it will be recycled and reused with hollow fiber nanofiltration membrane. The influence of hollow fiber nanofiltration membrane microstructure, ionic liquid concentration and composition in the spinning waste water, liquid flow status and other factors on the mass transfer performance will be studied. The mass transfer model for the description of ionic liquids through the hollow fiber nanofiltration membrane will be established on the basis of experimental research, and the mass transfer mechanism of recycling ionic liquid in the spinning waste water by hollow fiber nanofiltration membrane will

英文关键词： Poly(vinylidene fluoride)；ionic liquids；green thermally induced phase separation；melt spinning；hollow fiber membrane