Mixed matrix membranes (MMMs) based on two different MOFs (Cu-BTC and Cu-BDC) dispersed in Matrimid® 5218 were studied. The synthesized particles were characterized by N₂ sorption measurements, FTIR, SEM, TGA and XRD. Also, SEM, XRD, TGA, FTIR and DSC analyses were used to evaluate the structure of the prepared membranes. The MMMs were tested in separation of helium from CH₄ and N₂ at 35 °C and feed pressure of 5 bar. The effect of operating temperature and feed pressure on the separation performance of MMMs was investigated. The cross sectional SEM micrographs showed good adhesion between fillers and the polymer, however at 30 wt. % loading of Cu-BTC, non-selective voids were found in some areas. For the MMMs with 20 wt. % loading of Cu-BTC, permeability of He was found 49.7 Barrer and ideal selectivities for He/CH₄ and He /N₂ were 217.1 and 168.5, respectively. The MMM comprising 30 wt. % of Cu-BDC was chosen as the best membrane with ideal selectivities of He/CH₄ = 257.9 and He /N₂ = 193.4, which developed by 96.7 and 96.2 % compared to pure Matrimid.

研究了基于5218中分散的两种不同MOF（Cu-BTC和Cu-BDC）的混合基质膜（MMM）。通过N ₂吸附测量，FTIR，SEM，TGA和XRD对合成的颗粒进行表征。同样，使用SEM，XRD，TGA，FTIR和DSC分析来评估所制备膜的结构。对MMM进行了从CH ₄和N ₂中分离氦气的测试在35°C和5 bar的进料压力下。研究了操作温度和进料压力对MMM分离性能的影响。横截面SEM显微照片显示出填料与聚合物之间的良好粘合性，但是在30 wt。Cu-BTC的％负载，在某些区域发现了非选择性的空隙。对于20 wt。Cu-BTC的％负载，He的渗透性为49.7Barrer，并且对He / CH ₄和He / N _2的理想选择性分别为217.1和168.5。MMM包含30重量％。选择％的Cu-BDC作为最佳膜，其理想的He / CH ₄ = 257.9和He / N ₂ = 193.4选择性，与纯Matrimid相比，选择性提高了96.7和96.2％。