使用单孔喷丝头通过NIPS结合气体生成制备中空纤维膜

发布时间：2018-05-25 19:01

本文选题：中空纤维膜 + 非溶剂致相分离　；参考：《天津工业大学》2017年硕士论文

【摘要】：传统非溶剂致相分离法(NIPS)制备中空纤维膜需要设计和制造同轴喷丝头,在一定速度下提供平行并连续的聚合物溶液和孔液,这些因素限制了传统技术制备中空纤维膜的多样性。制备小直径中空纤维膜有很大发展空间,因为其可以使中空纤维膜组件更紧凑装填密度更高,并且分离纯化效果更好。本课题介绍了一种将含有气体生成剂(硼氢化钠)的聚砜溶液使用单孔喷丝头(不锈钢针头)通过传统NIPS结合气体生成直接制备中空纤维膜的方法,研究高分子浓度、凝固浴温度和pH对通过此方法制备中空纤维膜结构和性能的影响。当盐酸水溶液与NaBH4水解生成氢气和聚合物溶液相分离之间相互协同,则可以制备出中空结构良好和高度多孔的中空纤维膜。相反,当氢气的生成速率超过或者滞后于聚合物溶液相分离,则无法制备出中空结构的膜。易于调控的制备中空纤维膜过程,可以对聚砜中空纤维膜结构和性能进行调节,并且在染料分离方面拥有有广泛的应用前景。
[Abstract]:The preparation of hollow fiber membrane by traditional non-solvent phase separation method (NIPS) requires the design and manufacture of coaxial spinneret and the supply of parallel and continuous polymer solution and pore liquid at a certain speed. These factors limit the diversity of hollow fiber membrane prepared by traditional technology. The preparation of small diameter hollow fiber membrane has great space for development, because it can make the hollow fiber membrane module more compact filling density, and the separation and purification effect is better. In this paper, we introduce a method of preparing hollow fiber membrane directly by using single hole spinneret (stainless steel needle), which contains gas generator (sodium borohydride), to form hollow fiber membrane directly by conventional NIPS, and to study the concentration of polymer. Effects of coagulation bath temperature and pH on the structure and properties of hollow fiber membranes prepared by this method. When the hydrochloric acid aqueous solution is separated from NaBH4 to form hydrogen and polymer solution, a hollow fiber membrane with good hollow structure and highly porous structure can be prepared. On the contrary, when the formation rate of hydrogen exceeds or lags behind the phase separation of polymer solution, the hollow membrane can not be prepared. The process of preparing hollow fiber membrane is easy to control, which can adjust the structure and properties of polysulfone hollow fiber membrane, and has a wide application prospect in dye separation.
【学位授予单位】：天津工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TQ051.893

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