Jeon Hyunsik, Kang Sang Wook
Department of Chemistry, Sangmyung University Seoul 03016 Republic of Korea
Department of Chemistry and Energy Engineering, Sangmyung University Seoul 03016 Republic of Korea.
RSC Adv. 2019 Feb 6;9(9):4771-4775. doi: 10.1039/c8ra09274e. eCollection 2019 Feb 5.
A poly(ethylene oxide)(PEO)/AgBF/1-hexyl-3-methylimidazolium tetrafluoroborate (HMIMBF ) composite membrane that exhibits long-term stability was prepared for olefin/paraffin separation. The membrane was prepared by simply adding AgBF and HMIMBF to a solution of PEO. Long-term stability testing showed that the separation performance of the membrane is maintained for ≈100 h owing to the Ag NPs formed in the membrane, which are olefin carriers, being stabilized by HMIMBF . In terms of separation performance, the PEO/AgBF/HMIMBF composite membrane exhibited a propylene/propane selectivity of 11.8 and a mixed-gas permeance of 11.3 GPU. We also investigated the factors that determine separation performance by comparison with a PEO/AgBF/1-butyl-3-methylimidazolium tetrafluoroborate (BMIMBF ) composite membrane. The PEO/AgBF/HMIMBF composite membrane was characterized by scanning electron microscopy, FT-IR spectroscopy, ultraviolet-visible spectroscopy, thermogravimetric analysis, and Raman spectroscopy.
制备了一种具有长期稳定性的聚环氧乙烷（PEO）/AgBF/1-己基-3-甲基咪唑四氟硼酸盐（HMIMBF ）复合膜用于烯烃/石蜡分离。该膜通过简单地将AgBF和HMIMBF 添加到PEO溶液中制备而成。长期稳定性测试表明，由于膜中形成的作为烯烃载体的Ag NPs被HMIMBF 稳定，该膜的分离性能可维持约100小时。在分离性能方面，PEO/AgBF/HMIMBF 复合膜表现出11.8的丙烯/丙烷选择性和11.3 GPU的混合气体渗透率。我们还通过与聚环氧乙烷（PEO）/AgBF/1-丁基-3-甲基咪唑四氟硼酸盐（BMIMBF ）复合膜比较，研究了决定分离性能的因素。通过扫描电子显微镜、傅里叶变换红外光谱、紫外可见光谱、热重分析和拉曼光谱对PEO/AgBF/HMIMBF 复合膜进行了表征。
