摘要
利用两步法制备端羟基聚丁二烯(HTPB)基聚氨酯(HTPB-PU)渗透汽化膜,采用DSC和TGA表征HTPB-PU的微相结构和热性能,研究了该膜从水中回收乙酸甲酯(MA)的渗透汽化性能.从DSC结果可以看出,HTPB-PU膜有两个玻璃化转变温度,说明HTPB-PU膜具有微相分离结构.TGA结果表明,该膜具有很好的耐热性能.对于乙酸甲酯水溶液,该膜表现出良好的优先透乙酸甲酯性能,通过考察操作温度、料液中乙酸甲酯浓度等对HTPB-PU膜渗透汽化性能的影响发现:随着操作温度的增加,渗透通量增加、分离因子下降;当料液中乙酸甲酯质量分数为20%时,分离因子和渗透通量分别达到430和1 495 g/(m2.h).
A hydroxyterminated polybutadiene （HTPB） - based polyurethaneurea （PU）, HTPB - PU, was synthesized by two- step polymerization and was firstly used as membrane materials to recover aroma, methyl acetate （MA） from aqueous solution by pervaporation （PV）. The DSC results show that there are two transition temperatures in the HTPB - PU membrane, which mean the HTPB - PU membrane has micro - phase separa- tion structure. The TGA results show that the HTPB - PU membrane has a good heat - resistance. The mem- branes demonstrated high MA permselectivity as well as high MA flux. The effects of MA in feed, operating temperature on the PV performance of HTPB- PU membranes were investigated.
出处
《膜科学与技术》
CAS
CSCD
北大核心
2009年第5期88-93,共6页
Membrane Science and Technology
基金
"863"科技计划项目(2006AA020101)
关键词
聚氨酯
渗透汽化
乙酸甲酯
微相分离
polyurethaneurea
pervaporation
methyl acetate
micro-phase separation
