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首页> 外文期刊>Separation and Purification Technology >Preparation of Zeolitic Imidazolate Framework-91 and its modeling for pervaporation separation of water/ethanol mixtures
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Preparation of Zeolitic Imidazolate Framework-91 and its modeling for pervaporation separation of water/ethanol mixtures

机译：沸石咪唑酯框架-91的制备及其对水/乙醇混合物渗透蒸发分离的造型

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Zeolidc Imidazolate Framework (ZIFs) have received much attention in recent years because of their good compatibility with polymer, and their ultramicroporosities that are in the range of the kinetic diameter of several important gas and liquid molecules. In this study, three different ZIF particles, i.e., ZIF-90 and its derivatives (ZIF-91 and ZIF-92) were synthesized and incorporated into polydimethylsiloxane (PDMS) matrix to fabricate ZIF/PDMS nanocomposite membrane for pervaporation recovery of ethanol. The morphologies and structures of ZIF particles and their nanocomposite membrane were characterized by various techniques. The results show that ZIF-91 particles with hydroxyl functional groups have good compatibility with PDMS and are dispersed well in PDMS matrix. Meanwhile, ZIF-91/PDMS nanocomposite membrane have higher pervaporation performance compared to ZIF-90/PDMS and ZIF-92/PDMS nanocomposite membrane with the same loading of 20 wt%. The effects of particle loading, feed concentration and temperature on the separation performance of ZIF-91/PDMS membranes were also investigated. The results indicate that ZIF-91/PDMS-20 wt% membrane showed a prominent separation factor of 15.8 at 55 degrees C with a comparable total flux of 846 g/(m(2) h), which were higher than that of pure PDMS (4.1, 496 g/(m(2) h)). In addition, the pervaporation modeling for the flux and separation factor of ZIF-91/PDMS membrane were established with quadratic equations of temperature and feed concentration, which can be used to predict separation performance according to the experiment conditions.
机译：Zeolidc Imidazolate框架（Zifs）近年来由于它们与聚合物的良好相容性以及它们在几个重要的气体分子的动力学直径范围内的多孔隙而受到了很多关注。在该研究中，合成并将三种不同的ZIF颗粒，即ZIF-90及其衍生物（ZIF-91和ZIF-92）合成并掺入聚二甲基硅氧烷（PDMS）基质中以制造ZIF / PDMS纳米复合材料膜，用于普遍的乙醇的渗透回收。通过各种技术表征ZIF颗粒及其纳米复合膜的形态和结构。结果表明，ZIF-91羟基官能团的颗粒与PDMS具有良好的相容性，并在PDMS基质中分散良好。同时，与ZIF-90 / PDMS和ZIF-92 / PDMS纳米复合膜相比，ZIF-91 / PDMS纳米复合膜具有较高的渗透性渗透性性能，其具有相同负载的20wt％。还研究了颗粒加载，进料和温度对ZIF-91 / PDMS膜的分离性能的影响。结果表明，ZIF-91 / PDMS-20wt％膜在55℃下显示出15.8的突出分离因子，具有846g /（m（2）小时）的相当总通量，其高于纯PDMS的总通量（4.1,496g /（m（2）h）））。另外，利用温度和饲料浓度的二次方程建立了ZIF-91 / PDMS膜的通量和分离因子的渗透蒸发建模，其可用于根据实验条件预测分离性能。

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