Second interfacial polymerization of thin-film composite hollow fibers with amine-cyclodextrins for pervaporation dehydration
Second interfacial polymerization of thin-film composite hollow fibers with amine-cyclodextrins for pervaporation dehydration
复制标题
薄膜复合中空纤维与胺-环糊精的二次界面聚合渗透汽化脱水
DOI：
10.1002/aic.17144
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发表时间：
2021
期刊：
影响因子：
3.7
通讯作者：
Wang Yan
中科院分区：
文献类型：
--
作者：
Yu Xi;Zhu Tengyang;Xu Sheng;Zhang Xuan;Yi Ming;Xiong Shu;Liu Shutong;Shen Liang;Wang Yan
分别用氨水、乙二胺和三(2-氨基乙基)胺对β-CD进行氨改性，合成了3种胺基化β-环糊精(胺-CDS)，采用二次界面聚合的方法制备了用于渗透汽化脱水的高性能复合中空纤维膜。用多种方法表征了胺-硫化镉和SIP改性的TFC膜的化学性质。系统地研究了胺-环糊精的种类和反应条件(pH或CD-EDA溶液的浓度)对TFC膜性能的影响，获得了用于乙醇脱水的TFC膜的最佳选择层。结果表明，以2wt%CD-EDA水溶液(pH=2)处理的膜分离性能最好，在50℃时具有超高的渗透通量(3018.0± 12.0g/m2hr)和渗透浓度(98.7± 0.2wt%水)(相当于415倍的分离因子)，这是由于Cd的有效结合和丰富的亲水官能团以及促进水分子通过的固有纳米空间所致。
High performance thin‐film composite (TFC) hollow fiber membranes have been developed for pervaporation dehydration by second interfacial polymerization (SIP) modification with three kinds of amine‐functionalizedβ‐cyclodextrin (amine‐CDs), which were synthesized by modifyingβ‐CD with ammonia, ethylenediamine (EDA), and tris(2‐aminoethyl)amine, respectively. The chemical properties of amine‐CDs and SIP‐modified TFC membranes were characterized by various techniques. The effects of amine‐CD type and SIP parameters (pH or concentration of CD‐EDA solution) were studied systematically to acquire the optimized selective layer of TFC membranes for ethanol dehydration. Among all SIP‐modified TFC membranes, the one with SIP by 2 wt% CD‐EDA aqueous solution (pH = 2) exhibited the most outstanding separation performance with a ultrahigh permeation flux (3,018.0 ± 12.0 g/m2hr) and permeate concentration (98.7 ± 0.2 wt% water) at 50°C (equivalent to separation factor of 415), contributed by the effectively incorporated CD with rich hydrophilic functional groups and intrinsic nanocavities facilitating the passage of water molecules.