CAJ | 학술논문

含有醚氧基团的膜与 CO2分子具有较强的极性作用，可以实现对 CO2/N2物系的高效分离。其中，含丙烯氧（PO）基团的聚合物链段自由体积较大且不易结晶，是一类具有发展潜力的溶解选择性膜材料。以均苯三甲酰氯为油相单体，含 PO 基团的多胺为水相单体，通过界面聚合，成功制备了含 PO 基团的复合膜。分别采用聚醚胺D400、D230及T403为多胺水相单体，考察了膜内PO基团数量和交联度对复合膜分离性能的影响。结果表明，采用D400所制的复合膜由于具有最高的PO基团含量及较低的交联度，因此具有最高的CO2渗透速率和CO2/N2分离因子。之后，考察了单体浓度、酸吸收剂种类以及水相溶液 pH 对复合膜分离性能的影响。通过优化这些制膜条件，制备出了CO2/N2分离性能较好的复合膜。
함유미양기단적막여 CO2분자구유교강적겁성작용，가이실현대 CO2/N2물계적고효분리。기중，함병희양（PO）기단적취합물련단자유체적교대차불역결정，시일류구유발전잠력적용해선택성막재료。이균분삼갑선록위유상단체，함 PO 기단적다알위수상단체，통과계면취합，성공제비료함 PO 기단적복합막。분별채용취미알D400、D230급T403위다알수상단체，고찰료막내PO기단수량화교련도대복합막분리성능적영향。결과표명，채용D400소제적복합막유우구유최고적PO기단함량급교저적교련도，인차구유최고적CO2삼투속솔화CO2/N2분리인자。지후，고찰료단체농도、산흡수제충류이급수상용액 pH 대복합막분리성능적영향。통과우화저사제막조건，제비출료CO2/N2분리성능교호적복합막。
Membranes containing polyether segments may exhibit high CO2/N2 separation performance due to strong affinity between polyether segments and CO2. Membranes with ethylene oxide (EO) groups are widely investigated, but high crystallinity of membranes with EO groups reduces gas permeance of membranes. Compared with EO group, propylene oxide (PO) group possesses an additional side methyl group that prevents crystallization and increases free volume of the membrane, which promotes gas permeance of the membrane. However, preparation of the composite membrane containing PO groups is rarely reported. In this work, composite membranes containing PO groups were prepared by interfacial polymerization with trimesoyl chloride and polyetheramines containing PO groups. The effects of PO group content and degree of cross-linking on separation performance of the membrane were investigated by using D400, D230 or T403 as the monomer in the aqueous phase. The membrane prepared with D400 exhibited the highest CO2 permeance and CO2/N2 selectivity due to its high PO group content and low degree of cross-linking. Moreover, the effects of monomer concentration, acid acceptor, and pH of the aqueous phase on separation performance of the membranes were also investigated. The high-performance membrane containing PO groups was prepared by optimizing the preparation conditions.