熔纺聚氨酯系中空纤维膜的结构与性能  

Structure and Property of Melt-Spinning Polyurethane Based Hollow Fiber Membrane

作　　者：梁海先[1] 肖长发[1] 胡晓宇[1] 安树林[1] 

机构地区：[1]天津工业大学中空纤维膜材料与膜过程教育部重点实验室,天津300160

出　　处：《功能高分子学报》2007年第4期380-385,共6页Journal of Functional Polymers

基　　金：国家重点基础研究发展计划(973计划)课题(2006CB708600);教育部高等学校博士学科点专项科研基金项目(20040058002)

摘　　要：将聚氨酯/聚偏氟乙烯/聚乙二醇(PU/PVDF/PEG)熔融共混纺丝制得中空纤维膜,对纤维膜的微孔结构与性能进行研究,分析影响其水通量衰减的因素。结果表明:所得纤维膜具有界面及非界面微孔结构;随着水通量工作环境的变化,膜孔结构发生相应变化,表现出压力及温度响应性能;而经热处理后,所得膜部分微孔闭合,水通量下降;随测试时间延长,膜结构趋于致密化,水通量衰减。The hollow fiber membranes were prepared by melt-blending the ternary systems of polyurethane, polyvinylidene fluoride and polyethylene glycol. The microstructure and properties of the membrane were studied. The water flux of hollow fiber membrane declined was also analyzed. The experimental results show that the hollow fiber membranes possess interracial and non-interfacial micro-void. With the changing of work conditions, the structure of micro-void change accordingly, the membranes exhibite pressure and temperature-responsibility. After heating treatment, the micro-voids of the membranes are closed, and the water flux of hollow fiber membrane decline. Extending the working time, the membranes tend to compact, which also induce the water flux to decline.

关 键 词：熔体纺丝 聚氨酯 聚偏氟乙烯 中空纤维膜 

分 类 号：TQ028.8[化学工程]