Reactive Epoxy Nanofiltration Membranes with Disulfide Bonds for the Separation of Multicomponent Chemical Mixtures.
Reactive Epoxy Nanofiltration Membranes with Disulfide Bonds for the Separation of Multicomponent Chemical Mixtures.
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DOI：
10.1021/acsomega.8b00931
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发表时间：
2018-08-31
期刊：
影响因子：
4.1
通讯作者：
Bowden NB
中科院分区：
文献类型：
--
作者：
Gilmer CM;Bowden NB
本文报道了含有不稳定二硫键的有机溶剂纳滤膜的制备，该二硫键通过与化学刺激物反应而断裂。这些膜是新一代的智能膜，具有定制的选择性和通量，可以通过与化学刺激反应来改变。通过改变膜中二硫键的浓度来控制化学品通过膜的选择性和通量。当二硫键断裂时，膜中的孔变得更大，并产生不同的分离性能。膜的选择性变化高达70%，通量增加高达5倍。膜的选择性的快速变化允许三组分混合物的分离。33.3%的间二硝基苯，33.3%的三苯甲烷，和33.3%的1，3，5-三（二苯基氨基）苯（TDAB）的三组分混合物被分离成三个不同的馏分，显着富集在三个分子之一。第一级分含有纯度为82%、产率为84%的间二硝基苯，第二级分含有纯度为67%、产率为49%的三苯甲烷，第三级分含有纯度为71%、产率为88%的TDAB。
This article reports the fabrication of organic solvent nanofiltration membranes containing a labile disulfide bond, which is broken by reaction with a chemical stimulus. These membranes are a new generation of smart membranes that have tailored selectivities and flux that can be altered by reacting with a chemical stimulus. The selectivity and flux of chemicals through the membranes was controlled by varying the concentration of disulfide bonds in the membrane. When the disulfide bonds were cleaved, the pores in the membrane became larger and yielded different separation properties. The membrane selectivity was changed by up to 70% and flux was increased up to 5×. The rapid change in selectivity of the membrane allowed for the separation of three-component mixtures. A three-component mixture of 33.3% m-dinitrobenzene, 33.3% triphenylmethane, and 33.3% 1,3,5-tris(diphenylamino)benzene (TDAB) was separated into three different fractions that were significantly enriched in one of the three molecules. The first fraction contained m-dinitrobenzene at 82% purity and 84% yield, the second fraction contained triphenylmethane at 67% purity and 49% yield, and the third fraction contained TDAB at 71% purity and 88% yield.
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