摘要
两步法制备了4A沸石填充的端羟基聚丁二烯基聚氨酯膜HTPB-PU/4A,并研究了CO2、H2、O2、N2的气体透过性能。结果表明:沸石与膜的相容性较好,添加4A沸石后,膜的热稳定性明显提高,O2渗透性及O2/N2选择性显著改善;随沸石添加时间的增加,膜对各种气体体系的选择性先增加后减小,而渗透性则先增加后趋于稳定;随硬段含量的增加,气体渗透性均下降,CO2/N2、O2/N2、H2/N2的选择性先升后降;随沸石添加量的增加,O2渗透性一直上升,而O2/N2的选择性先上升后下降,最大选择性达到7.11。
Zeolite 4A-filled hydroxyl terminated polybutadiene （HTPB） -based polyurethaneurea （PU） membranes, HTPB-PU/4A, are prepared by a two-step polymerization process to investigate the permeability of CO2, H2,O2 and N2. The results show that zeolite 4A particles are compatible with the PU segments and the incorporation of the zeolite 4A particles can apparently improve the thermal stability, permeability of O2 and selectivity of O2/N2 of the membranes. With the adding time of zeolite 4A increasing, the selectivity of the various gas systems increases initially and then decreases, while the permeability increases initially and then levels off. Increasing the content of hard segment in HTPB-PU, the permeability of various gas system in this study all decrease. However, the selectivity of CO2/N2. O2/N2 , H2/N2 increases initially and then decreases. As the amount of zeolite 4A increases, O2 permeability continuously increases while the selectivity of O2/N2 increases at first and descrease afterwards. The highest selectivity can reach 7. 11.
出处
《现代化工》
CAS
CSCD
北大核心
2011年第9期32-34,36,共4页
Modern Chemical Industry
基金
中央高校基本科研业务费专项资金(JUSRP21113)
关键词
有机-无机杂化膜
聚氨酯
4A沸石
气体分离性能
微相分离
organic-inorganic hybrid membranes
polyurethaneurea
Zeolite 4A
gas separation performance
microphase separation
