Highly efficient PDMS based membranes with a new type of fluorinated MOF-808 were successfully prepared and used for the first time in pervaporation (PV). Two types of ligands i.e. trifluoroacetic acid (TFA) and pentafluoropropionic acid (PFPA) were used during the MOF synthesis. These ligands with slightly different size and chemical character influenced the material properties of the membranes, i.e. roughness, contact angle, surface free energy, and thermal features. Incorporation of MOFs enhanced the membrane hydrophobicity and the performance in organic-organic PV for the separation of industrially important mixtures like, ethyl acetate-EtAc and ethyl tert-butyl ether-ETBE. The filled membranes possessed much better transport and separation features than the pristine PDMS. Substantial improvement of modified membrane performance with 5wt% MOF (normalized Pervaporation Separation Index – PSI_N=1540 µm kg m^-2h^–1) was observed in relation to pristine PDMS (PSI_N=780 µm kg m^-2h^–1) and commercial Pervap4060 (PSI_N=150 µm kg m^-2h^–1), during the separation of ETBE/EtOH. An important added value was the study of the impact of water traces (in the range 0.1-0.3 wt%) in the feed on the membrane performance. The level of water in the permeate was dependent on the membrane material composition, i.e. the MOF loading, since the presence of hydrophobic MOF restricted the transport of water to the permeate side.

成功地制备了具有新型氟化MOF-808的高效PDMS基膜，并将其首次用于全蒸发（PV）。在MOF合成过程中使用了两种配体，即三氟乙酸（TFA）和五氟丙酸（PFPA）。这些大小和化学特性略有不同的配体影响了膜的材料性能，即粗糙度，接触角，表面自由能和热学特性。MOF的加入增强了膜疏水性，并提高了有机-有机PV分离工业重要混合物（如乙酸乙酯-EtAc和乙基叔酸）的性能丁基醚-ETBE。填充的膜比原始PDMS具有更好的运输和分离功能。与原始PDMS（PSI _N = 780 µm kg m ^-2 h ^-1）相比，观察到采用5wt％MOF（归一化渗透蒸发分离指数– PSI _N = 1540 µm kg m ^-2 h ^–1）显着改善了改性膜的性能。和商用Pervap4060（PSI _N = 150 µm kg m ^-2 h ^–1），在ETBE / EtOH分离过程中。一个重要的附加值是研究进料中痕量水（在0.1-0.3 wt％范围内）对膜性能的影响。渗透液中水的含量取决于膜材料的成分，即MOF的负载量，因为疏水性MOF的存在限制了水向渗透液侧的传输。