Preparation of novel hydrophilic microporous material PML-1 membrane by topotactic transformation of layered silicate SSA-1 and applicability to the dehydration of aqueous acetic acid
Preparation of novel hydrophilic microporous material PML-1 membrane by topotactic transformation of layered silicate SSA-1 and applicability to the dehydration of aqueous acetic acid
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DOI：
10.1016/j.micromeso.2019.05.022
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发表时间：
2019-09-01
影响因子：
5.2
通讯作者：
Oumi, Yasunori
中科院分区：
文献类型：
--
作者：
Inoue, Reina;Ueno, Kyohei;Oumi, Yasunori
新型亲水性PML-1（PML：由层状硅酸盐转化的多孔材料）膜通过水热预涂覆的层状硅酸盐SSA-1（SSA：用季胺合成的硅酸盐）层的煅烧驱动的拓扑异构转化在多孔管状α-氧化铝载体上制备。详细研究了晶种、合成时间和重复合成对支撑型层状硅酸盐层和相应膜的形成和形貌的影响，以揭示重复合成允许制备致密和连续的层状硅酸盐层。的PML-1膜的性能与约6米厚的分离层的渗透蒸发脱水的含水乙酸进行了检查，所观察到的水选择性渗透归因于许多残留的硅烷醇基团在膜框架中的存在。这些结果表明，所制备的PML-1膜适用于水/乙酸混合物的分离，从而为层状硅酸盐作为新型膜材料的进一步开发和应用提供了新的途径。
Novel hydrophilic PML-1 (PML: porous material transformed from a layered silicate) membranes were prepared on a porous tubular alpha-alumina support by a calcination-driven topotactic transformation of a hydrothermally pre-coated layered silicate SSA-1 (SSA: silicate synthesized with a quaternary amine) layer. The effects of seed crystal, synthesis time, and repetitive synthesis on the formation and morphologies of the supported layered silicate layers and corresponding membranes were investigated in detail to reveal that repetitive synthesis allowed the preparation of a dense and continuous layered silicate layer. The performance of the PML-1 membrane with an approximately 6-m-thick separation layer for the pervaporation dehydration of aqueous acetic acid was examined, and the observed water-selective permeability was ascribed to the presence of numerous residual silanol groups in the membrane framework. These results indicate that the prepared PML-1 membrane is applicable to the separation of water/acetic acid mixtures and hence, provide a new approach to the further development and application of layered silicates as novel membrane materials.