Amphiphilic poly(ether sulfone) membranes for oil/water separation: Effect of sequence structure of the modifier
Amphiphilic poly(ether sulfone) membranes for oil/water separation: Effect of sequence structure of the modifier
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用于油/水分离的两亲性聚醚砜膜：改性剂序列结构的影响
DOI：
10.1002/aic.15365
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发表时间：
2017-02
期刊：
影响因子：
3.7
通讯作者：
Chen Fengqiu
中科院分区：
文献类型：
--
作者：
Zhang Guangfa;Jiang Jingxian;Zhang Qinghua;Zhan Xiaoli;Chen Fengqiu
含油废水严重威胁着人类的健康和环境，因此，新型低污染膜材料的开发成为含油废水处理的迫切需求。以聚乙二醇甲醚甲基丙烯酸酯（PEGMA）和丙烯酸3，3，4，4，5，5，6，6，7，7，8，8，8-十三氟辛酯（TFOA）为单体，采用可逆加成-断裂链转移（RAFT）法合成了3种分子量和化学组成相近的两亲性无规、梯度和嵌段共聚物。然后通过非溶剂诱导相分离和表面分离的耦合过程，将两亲性聚醚砜与共聚物共混制备成两亲性聚醚砜膜。伴随着聚合物基体的相转化过程，两亲性改性剂中的亲水链段和疏水链段会迁移到膜表面。这种表面分离过程导致化学异质膜表面，包括亲水性PEGMA和低表面能PTFOA刷，这是通过X射线光电子能谱（XPS）和表面润湿性分析证实。水包油型乳液过滤实验表明，该膜具有较低的渗透通量下降和较高的通量恢复率（高达99.8%），从而确立了其显著提高的渗透性能。此外，循环油/水分离和长期的水下浸泡测试表明，所制备的膜具有良好的亲水性和稳定性的两亲性添加剂改性。© 2016美国化学工程师学会AIChE J，63：739-750，2017
Oil-contaminated wastewater threatens our environment and health thus novel membrane materials with low or nonfouling properties are an immediate need for oily wastewater treatment in a cost-effective and environmentally friendly manner. In this study, three types of amphiphilic random, gradient, and block copolymers with similar molecular weights and chemical compositions, based on poly(ethylene glycol) methyl ether methacrylate (PEGMA) and 3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluorooctyl acrylate (TFOA), were synthesized by the reversible addition-fragmentation chain transfer (RAFT) method. The amphiphilic Poly(ether sulfone) membranes were then fabricated by blending with these copolymers via a facile coupled process of nonsolvent induced phase separation and surface segregation. Accompanying the phase inversion process of polymer matrix, the hydrophilic and hydrophobic segments in the amphiphilic modifiers would migrate and immobilize onto the membrane surfaces. This surface segregation process leaded to a chemical heterogeneous membrane surface comprising both hydrophilic PEGMA and low surface energy PTFOA brushes, which was confirmed by X-ray photoelectron spectroscopy (XPS) and surface wettability analyses. Oil-in-water emulsion filtration test of the membranes displayed a lower permeate flux decline and a higher flux recovery (as high as 99.8%), establishing their considerably elevated antifouling properties. Additionally, cyclic oil/water separation and long-term underwater immersion tests demonstrated that the as-prepared membranes modified by these amphiphilic additives possessed excellent antifouling stabilities. © 2016 American Institute of Chemical Engineers AIChE J, 63: 739–750, 2017
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影响因子：
9.5
作者：
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通讯作者：
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影响因子：
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作者：
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