聚醚共聚酰胺膜的制备与分离性能
冯世超;任吉中;李晖;花开胜;李新学;邓麦村
【期刊名称】《膜科学与技术》 【年(卷),期】2013(033)004
【摘要】Block copolymer poly (amide-12-b-ethylene oxide) (Pebax1074) is used to prepare the hydrophilic dense membrane by casting method.Due to the specific affinity of PEO segment to polar gas CO2,Pebax1074 membrane shows high CO2 permeability and CO2/light gas selectivity.Due to CO2 induced plasticization effect,the CO2 permeability increases with increasing pressure,which is more obvious at
low
temperature.The
permeabilities
of
N2
、CH4
and
H2,however,decrease with increasing pressure due to the hydrostatic pressure effect,which decreases with increasing temperature.The relationship between gas permeability and operating temperature can be described by Arrhenius equation.With increasing pressure,the activation energies of permeation for N2 、CH4 and H2 decrease,whereas that for CO2 increases.%以橡胶态聚醚共聚酰胺(Pebax1074)嵌段共聚物为膜材料,采用流延法制备亲水性无缺陷的Pebax1074均质膜.由于Pebax1074嵌段高分子中的聚环氧乙烷(PEO)链段对CO2分子的亲和性,Pebax1074膜对CQ/非极性气体分离体系有较高的分离性能.CO2渗透系数由于增塑作用随膜两侧压差的增大而显著增大,且温度越低增塑作用越大;而N2、CH4和H2等非极性气体的渗透系数由于流体静力学压力效应随膜两侧压
聚醚共聚酰胺膜的制备与分离性能
