Faykov Ilya, Polotskaya Galina, Kuryndin Ivan, Zoolshoev Zoolsho, Saprykina Natalia, Tian Nadezhda, Sorokina Angelina, Pulyalina Alexandra
Institute of Chemistry, Saint Petersburg State University, 198504 Saint Petersburg, Russia.
Institute of Macromolecular Compounds, Russian Academy of Sciences, 199004 Saint Petersburg, Russia.
Membranes (Basel). 2023 May 15;13(5):516. doi: 10.3390/membranes13050516.
A novel hybrid membrane was developed on the basis of poly(-phenylene isophthalamide) (PA) by introducing an original complex modifier into the polymer; this modifier consisted of equal amounts of heteroarm star macromolecules with a fullerene C core (HSM) and the ionic liquid [BMIM][TfN] (IL). The effect of the (HSM:IL) complex modifier on characteristics of the PA membrane was evaluated using physical, mechanical, thermal, and gas separation techniques. The structure of the PA/(HSM:IL) membrane was studied by scanning electron microscopy (SEM). Gas transport properties were determined by measuring He, O, N, and CO permeation through the membranes based on PA and its composites containing a 5 wt% modifier. The permeability coefficients of all gases through the hybrid membranes were lower than the corresponding parameters for the unmodified membrane, whereas the ideal selectivity in the separation of He/N, CO/N and O/N gas pairs was higher for the hybrid membrane. The position of the PA/(HSM:IL) membrane on the Robeson's diagram for the O/N gas pair is discussed.
通过向聚间苯二甲酰间苯二胺（PA）聚合物中引入一种新型复合改性剂，制备了一种新型杂化膜；该改性剂由等量的以富勒烯C为核的杂臂星形大分子（HSM）和离子液体[BMIM][TfN]（IL）组成。采用物理、机械、热学和气体分离技术评估了（HSM:IL）复合改性剂对PA膜性能的影响。通过扫描电子显微镜（SEM）研究了PA/（HSM:IL）膜的结构。基于PA及其含5 wt%改性剂的复合材料，通过测量He、O、N和CO在膜中的渗透来测定气体传输性能。所有气体通过杂化膜的渗透系数均低于未改性膜的相应参数，而杂化膜在He/N、CO/N和O/N气体对分离中的理想选择性更高。讨论了PA/（HSM:IL）膜在O/N气体对的罗伯逊图上的位置。
