Ultralow Oil-Fouling Heterogeneous Poly(ether sulfone) Ultrafiltration Membrane via Blending with Novel Amphiphilic Fluorinated Gradient Copolymers
Ultralow Oil-Fouling Heterogeneous Poly(ether sulfone) Ultrafiltration Membrane via Blending with Novel Amphiphilic Fluorinated Gradient Copolymers
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新型两亲性氟化梯度共聚物共混超低油污异质聚醚砜超滤膜
DOI：
10.1021/acs.langmuir.5b04044
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发表时间：
2016
期刊：
影响因子：
3.9
通讯作者：
Chen Fengqiu
中科院分区：
文献类型：
--
作者：
Zhang Guangfa;Jiang Jingxian;Zhang Qinghua;Gao Fan;Zhan Xiaoli;Chen Fengqiu
以聚乙二醇甲基醚甲基丙烯酸酯（PEGMA）和丙烯酸3，3，4，4，5，5，6，6，7，7，8，8，8-十三氟辛基酯（TFOA）为单体，采用半间歇可逆加成-断裂链转移（RAFT）法合成了一种新型两亲性含氟梯度共聚物。然后将所得两亲性共聚物引入聚醚砜（PES）中，通过非溶剂诱导相分离法（NIPS）制备PES共混膜。在相转化过程中，亲水性（PEGMA）和低表面能（TFOA）段显着富集在膜表面的表面偏析，形成一个两亲性的表面，这是由表面润湿性能和X射线光电子能谱（XPS）测量证明。对水包油型乳状液的过滤实验表明，与纯PES膜相比，非均相膜具有较低的通量衰减率（15.4%）和较高的通量恢复率（几乎100%），表现出上级的耐油污染性能。结果表明，该复合材料具有良好的阻垢和除垢性能，阻垢和除垢机理的协同作用是其优良的阻垢性能的主要原因。这项研究的结果提供了一个简单和强大的策略，用于制造超低油污染膜，可用于有效的油/水分离。
A novel amphiphilic fluorinated gradient copolymer was prepared by semibatch reversible addition–fragmentation chain transfer (RAFT) method using poly(ethylene glycol) methyl ether methacrylate (PEGMA) and 3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluorooctyl acrylate (TFOA) as monomers. The resultant amphiphilic copolymers were then incorporated into the poly(ether sulfone) (PES) to fabricate PES blend membranes via the non-solvent-induced phase separation method (NIPS). During the phase inversion process, both hydrophilic (PEGMA) and low surface energy (TFOA) segments significantly enriched on the membrane surface by surface segregation to form an amphiphilic surface, which was demonstrated by surface wetting properties and X-ray photoelectron spectroscopy (XPS) measurements. According to the filtration experiments of oil-in-water emulsion, the heterogeneous membranes exhibited superior oil-fouling resistant properties, that is, low flux decay (as low as 15.4%) and high flux recovery (almost 100%), compared to the pure PES membrane. The synergistic effect of fouling-resistant and fouling-release mechanisms was found to be responsible for the excellent antifouling capacities. The findings of this study offer a facile and robust strategy for fabricating ultralow oil-fouling membranes that might be used for effective oil/water separation.