摘要
将金属骨架化合物(MOFs)——Cu3(BTC)2填充到聚二甲基硅氧烷中,制备聚二甲基硅氧烷/聚醚酰亚胺(PDMS/PEI)非对称平板复合膜,进行了4种气体O2、N2、CO2及CH4的渗透过程研究,考察了Cu3(BTC)2填充量及操作条件对膜分离性能的影响.结果表明,随Cu3(BTC)2填充量的增加,4种气体的渗透通量及O2/N2、CO2/N2和CO2/CH4的分离系数较未改性的复合膜均有所提高,其中填充量为25%的改性复合膜获得了较优的效果;随操作压力的升高,气体的渗透通量增大而分离系数略有上升;随操作温度的升高,气体的渗透通量增大,CO2/N2和O2/N2的分离系数有所下降,而CO2/CH4的分离系数略有增加.
Asymmetric polydimethylsiloxane（PDMS）/polyetherimide（PEI） composite flat membranes filled with metal organic frameworks（MOFs）--Cu3 （BTC）2 were prepared. The permeation flux and separation factors of O2 ,N2 ,CO2 and CH4 were measured. It was shown that with increasing Cu3 （BTC）2 loadings, gas permeation flux and Oz/N2, CO2/N2 and CO2/CH2 separation factors are higher than those of unmodified composite membranes with increasing Cu3 （BTC）2 loadings, particularly for the modified composite membrane with 25 % filler loadings. Both of permeation flux and separation factors increase with increasing pressure. Permeation flux slightly increases with the increase of temperature. The similar results could be observed in CO2/CH4 separation factor; oppositely, the separation factors of CO2/N2and O2/N2 decrease slightly.
出处
《膜科学与技术》
CAS
CSCD
北大核心
2012年第6期64-68,共5页
Membrane Science and Technology
基金
国家"973"计划(2003CD61570)
作者简介
周伟（1987－），男，江苏人，硕士生，从事膜分离研究．
通讯联系人，（liuly@mail．buct．edu．cn）
