beta-Cyclodextrin-based poly(ionic liquids) membranes enable the efficient separation of the amino acids mixture
beta-Cyclodextrin-based poly(ionic liquids) membranes enable the efficient separation of the amino acids mixture
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基于 β-环糊精的聚（离子液体）膜能够有效分离氨基酸混合物
DOI：
10.1016/j.jiec.2021.07.046
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发表时间：
2021
影响因子：
6.1
通讯作者：
Zhijian Tan
中科院分区：
文献类型：
--
作者：
Wang Yu;Lianglei Liu;Fenfang Li;Zhijian Tan
聚离子液体（PILs）作为一种新型的手性分离材料，在分离氨基酸等两性电解质方面具有很好的应用前景。本文合成了β-环糊精基离子液体，并与聚偏氟乙烯（PVDF）共混制备了聚离子液体膜（PILMs）。采用傅里叶变换红外光谱（FT-IR）、核磁共振氢谱（1H NMR）、扫描电子显微镜（SEM）、热重分析（TGA）、机械强度、zeta电位和孔径分布对膜及其中间体进行了表征。这些膜已被开发用于选择性分离L-谷氨酸（L-Glu）和L-苏氨酸（L-Thr）的氨基酸混合物。考察了氨基酸混合溶液的pH值、膜中PVDF的用量等因素对分离效果的影响。在最佳条件下，一步分离的选择性最高可达55%。该膜分离过程具有选择性好、操作压力低、水通量大、重复使用性好等优点，在多种氨基酸混合物的分离中具有应用潜力。
As a kind of novel polyelectrolyte materials, poly(ionic liquids) (PILs) have excellent potentiality in the separation of ampholytes suchlike amino acids. Herein, the β-cyclodextrin-based PILs had been synthesized, followed by blending with poly(vinylidene fluoride) (PVDF) to prepare poly(ionic liquid) membranes (PILMs). The Fourier transformed infrared (FT-IR) spectroscopy,1H nuclear magnetic resonance (1H NMR), scanning electron microscope (SEM), thermal gravimetric analysis (TGA), mechanical strength, zeta potential, and pore size distribution were characterized for these membranes or their intermediates. These PILMs had been developed for the selection separation of the amino acids mixture of L-glutamic acid (L-Glu) and L-threonine (L-Thr). The factors influencing the separation result were investigated, including the solution pH of the amino acids mixture and the PVDF amount in PILMs. The maximum selectivity of 55% can be obtain by one-step separation under the optimal conditions. This separation process using PILMs had the advantages of good selectivity, low operating pressure, larger water flux, and good reusability, which had the potentiality in the separation of various amino acids mixtures.