新型嵌段共聚物优先透醇膜材料及其渗透汽化性能研究

项目名称： 新型嵌段共聚物优先透醇膜材料及其渗透汽化性能研究

项目编号： No.20876003

项目类型： 面上项目

立项/批准年度： 2009

项目学科： 化学工业

项目作者： 纪树兰

作者单位： 北京工业大学

项目金额： 32万元

中文摘要： 渗透汽化膜技术为连续发酵生产乙醇提供了新途径，高通量、高选择性且稳定的优先透醇膜材料的开发是该领域的研究热点之一。本研究将橡胶态的PDMS与玻璃态的PPO嵌段共聚，得到主链上同时含有多个硅氧基和芳香环结构的一种新型优先透醇膜材料；采用溶剂挥发法制备均质膜，研究了乙醇和水分子在致密膜中的溶解和扩散性能的差异；采用溶胶凝胶法制备出高通量的非对称膜，借助现代分析手段，考察了膜的微观结构、形貌对乙醇/水分离性能的变化规律，并研究了溴取代基的PPO对膜结构及分离性能的影响；以平板和中空纤维聚砜超滤膜为支撑体制备出优先透醇渗透汽化复合膜。本研究将为新型嵌段共聚物膜材料结构的设计和调控提供理论指导。

中文关键词： 聚二甲基硅氧烷；聚苯醚；嵌段共聚物；渗透汽化；优先透醇膜

英文摘要： Pervaporation membrane technology provides new ways for continuous ethanol fermentation, the membrane material for ethanol-selective, which are high flux, high selectivity and stability, is one of the hot spots in the area. In this research, PDMS which are rubber state were copolymerized with of PPO which are glass state, a novel material, of which the main chains contains multiple Silicon oxygen base and aromatic ring structure were obtained and applied in the ethanol-selective membranes; A solvent evaporation method was used to prepared the homogenous membranes, and the difference of solubility and diffusion between ethanol and water in the membrane were studied; A high flux asymmetric membrane was prepared by a Sol-gel method, and the effect of micro-structure, morphology, conduct conditions, and the substituent on PPO to the separation performance were studied. The composite membranes were success prepared based on the plate and hollow fiber Polysulfone ultrafiltration membranes. This research would be the theory guide on the design of novel block copolymers, which used in the separation of alcohol/water.

英文关键词： polydimethylsiloxane; poly (2;6-dimethyl-1;4-phenylene oxide); block copolymers; pervaporation; ethanol-selective membrane