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首页> 外文期刊>Journal of Membrane Science >Preparation and characterization of improved fouling-resistant PPESK ultrafiltration membranes with amphiphilic PPESK-graft-PEG copolymers as additives
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Preparation and characterization of improved fouling-resistant PPESK ultrafiltration membranes with amphiphilic PPESK-graft-PEG copolymers as additives

机译：以两亲性PPESK-接枝-PEG共聚物为添加剂的改进的抗污PPESK超滤膜的制备与表征

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摘要

Asymmetrical ultrafiltration membranes were prepared from poly(phthalazinone ether sulfone ketone) (PPESK) blends with the synthesized amphiphilic graft copolymers having a PPESK backbone and poly(ethylene glycol) (PEG) side chains (PPESK-g-PEG). The membranes were prepared by the traditional immersion precipitation method in a wet process. X-ray photoelectron spectroscopy (XPS) analysis and water contact angle measurements indicated that the hydrophilic graft copolymers preferentially segregated to membrane surface during membrane formation, contributing the membranes with enhanced surface hydrophilicity. The effects of coagulation bath composition and casting temperature on the surface enrichment properties of the graft copolymers, membrane morphology, permeability and fouling resistance were investigated. It was found that the elevation of casting temperature promoted the surface immigration of the additives, and consequently endowed PPESK membrane with higher surface hydrophilicity and permeability. Based on static protein adsorption and protein filtration experiments, the anti-fouling properties of the membranes were evaluated, and the results showed that the PPESK membranes incorporating with PPESK-g-PEG had a significantly improved resistance to protein fouling.
机译：由聚（酞嗪酮醚砜酮）（PPESK）共混物与合成的具有PPESK主链和聚（乙二醇）（PEG）侧链的两亲接枝共聚物（PPESK-g-PEG）制备不对称超滤膜。膜是通过传统的浸入沉淀法在湿法中制备的。 X射线光电子能谱（XPS）分析和水接触角测量表明，亲水性接枝共聚物在膜形成过程中优先偏析在膜表面，从而使膜具有增强的表面亲水性。研究了凝固浴组成和浇铸温度对接枝共聚物表面富集性能，膜形态，渗透性和耐污性的影响。发现浇铸温度的升高促进了添加剂的表面迁移，因此赋予了PPESK膜更高的表面亲水性和渗透性。通过静态蛋白质吸附和蛋白质过滤实验，评估了膜的防污性能，结果表明，结合了PPESK-g-PEG的PPESK膜具有显着提高的抗蛋白质污垢性。

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