Synthesis of Ultrathin Zeolitic Imidazolate Framework ZIF-8 Membranes on Polymer Hollow Fibers Using a Polymer Modification Strategy for Propylene/Propane Separation
Synthesis of Ultrathin Zeolitic Imidazolate Framework ZIF-8 Membranes on Polymer Hollow Fibers Using a Polymer Modification Strategy for Propylene/Propane Separation
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DOI：
10.1021/acs.iecr.9b02969
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发表时间：
2019-08-14
影响因子：
4.2
通讯作者：
Jeong, Hae-Kwon
中科院分区：
文献类型：
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作者：
Hamid, Mohamad Rezi Abdul;Park, Sunghwan;Jeong, Hae-Kwon
多晶沸石咪唑酯骨架 ZIF-8 膜在高效节能的丙烯/丙烷分离方面显示出巨大的潜力。然而，由于缺乏在可扩展基底上进行超薄 ZIF-8 膜的简便且经济高效的加工技术，它们的大规模应用受到阻碍。在这里，我们报告了基于聚合物改性策略在 Matrimid 中空纤维的孔侧轻松制备超薄 ZIF-8 膜。该方法的位置选择性性质使得能够对中空纤维上活性 ZIF-8 层的位置（即孔侧或壳侧）进行位置控制。在具有聚二甲基硅氧烷涂层的Matrimid中空纤维的孔侧上生长的ZIF-8膜表现出平均丙烯渗透性和分离因子，分别类似于152 X 10(-10) mol.m(-2).Pa-1.s(-1)和类似于55。 ZIF-8 接种步骤的优化提高了丙烯渗透性（类似于 369 x 10(-10) mol.m(-2).Pa-1.s(-1)），同时保持相对较高的分离因子（类似于 40）。
Polycrystalline zeolitic imidazolate framework ZIF-8 membranes have shown great potential for energy-efficient propylene/propane separation. Their large-scale applications are, however, hampered by the lack of facile and cost-effective processing technologies for ultrathin ZIF-8 membranes on scalable substrates. Here, we report facile preparation of ultrathin ZIF-8 membranes on the bore side of Matrimid hollow fibers based on a polymer modification strategy. Site-selective nature of the method enables a positional control over locations (i.e., bore or shell side) of active ZIF-8 layers on the hollow fibers. The ZIF-8 membranes grown on the bore side of Matrimid hollow fibers with polydimethylsiloxane coating displayed an average propylene permeance and a separation factor of , similar to 152 X 10(-10) mol.m(-2).Pa-1.s(-1) and similar to 55, respectively. Optimization of ZIF-8 seeding step resulted in an improvement in propylene permeance (similar to 369 x 10(-10) mol.m(-2).Pa-1.s(-1)) while maintaining relatively high separation factor (similar to 40).