Hybrid Membranes of hPEA@PVDF for Molecular Recognition and Separation of Phenols and Anilines
Hybrid Membranes of hPEA@PVDF for Molecular Recognition and Separation of Phenols and Anilines
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用于苯酚和苯胺分子识别和分离的 hPEA@PVDF 混合膜
DOI：
10.1002/admt.201900529
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发表时间：
2019-09
影响因子：
6.8
通讯作者：
Cui Mengzhong
中科院分区：
文献类型：
--
作者：
Teng Shang;Li Jin;Tao Tao;Su Zhilong;Jiang Xuesong;Cui Mengzhong
以聚偏氟乙烯（PVDF）为骨架，超支化聚醚胺（hPEA）为表面，通过结晶和扩散相结合的方法制备了具有独特的微通道结构的杂化多孔膜。通过二甲基亚砜（DMSO）溶剂的成核/结晶、聚合物的分层/相分离（用于液相中的溶剂损失和聚合物在较低温度下的溶解度降低）以及DMSO和水分子之间的交换效应的协同作用，产生具有完全良好排列、开放和互连的微通道的横截面曲折孔。两亲性hPEA高分子链的引入有效地改善了PVDF的亲水性，其透水性提高了3.2倍，接触角减小了约4倍，使hPEA@PVDF杂化膜在静态和过滤过程中对酚类和苯胺类化合物具有高灵敏度的识别和分离能力。此外，混合hPEA@PVDF膜很容易再生，并在吸附再生测试期间保持其原始状态。这表明杂化膜将用于通过水处理中的一锅过滤工艺分离致癌、致突变和难以生物降解或直接好氧消化的有毒组分。
Hybrid porous membranes with unique gradually open microchannels, which is comprised of polyvinylidene fluoride (PVDF) as skeletons and functional hyperbranched poly(ether amine) (hPEA) as coverage surface, are formed via a combined crystallization and diffusion approach. The cross‐sectional tortuous pores with fully well‐arranged, opened, and interconnected microchannels are generated that are directed by synergistic effect of the nucleation/crystallization of dimethylsulfoxide (DMSO) solvent, demixing/phase separation of polymers for both the loss of solvent in liquid phase and the reduced solubility of polymer at lower temperature, and exchanging effect between DMSO and water molecules. The introduction of functional amphipathic hPEA polymer chains effectively improves the hydrophilicity of pure PVDF with water permeation increased for 3.2 times, and contact angle decreases for about four times, and endowing the hPEA@PVDF hybrid membranes with high sensitive recognition and separation of phenols and anilines both in static and filtration processes. Moreover, the hybrid hPEA@PVDF membranes are easily regenerated and retained to their original states during adsorption–regeneration tests. This indicates that the hybrid membranes will be used in separation of toxic components that are carcinogenic, mutagenic, and difficult to biodegrade or direct aerobic digestion in nature via a one‐pot filtration process in water treatments.
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期刊：
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期刊：
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