非溶剂型添加剂对聚醚砜膜结构和性能的影响

Q2 Materials Science

Journal of Membrane Science and Research Pub Date : 2020-05-13 DOI:10.22079/JMSR.2020.123606.1361

A. Bildyukevich, T. Hliavitskaya, G. Melnikova

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引用次数: 0

摘要

本工作中获得的结果使我们能够提出一种新的方法来制备具有所需结构和性能的聚醚砜（PES）超滤膜。结果表明，从位于双峰线附近的浇铸溶液中可以获得具有海绵状结构的超滤膜。然而，随着非溶剂添加剂（NSA）沉淀值（PV）的增加，观察到具有海绵状结构的膜的纯水通量（PWF）更高。饱和度（α*–添加到聚合物溶液中的NSA量与导致相分离的NSA用量的比率）α*=0.52-0.81（取决于NSA的PV）时，可获得性能最大的超滤膜。在这种情况下，大孔隙将在膜的支撑层的结构中占主导地位。大孔隙的大小和形状也取决于NSA的PV。NSA的PV越高，支撑层结构中的大孔隙尺寸越大。

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EFFECT OF NON-SOLVENT ADDITIVES TO THE CASTING SOLUTION ON THE STRUCTURE AND PROPERTIES OF POLYETHERSULFONE UF MEMBRANES

The obtained results in this work allow us to propose a new approach to fabricate polyethersulfone (PES) ultrafiltration (UF) membranes with desired structure and performance. It was shown that UF membranes with a spongy structure are obtained from casting solutions located near the binodal line. However, with increasing the precipitation value (PV) of non-solvent additives (NSA), the higher pure water flux (PWF) of membranes with the spongy structure was observed. UF membranes with maximum performance are obtained when degree of saturation (α* – the ratio of the NSA amount added to the polymer solution to the NSA amount which causes phase separation) α*= 0.52-0.81 (depending on PV of NSA). In this case, macrovoids will prevail in the structure of the supporting layer of membranes. The size and shape of macrovoids also depend on the PV of NSA. The higher the PV of NSA, the larger the size of macrovoids in the structure of supporting layer.

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来源期刊

Journal of Membrane Science and Research Materials Science-Materials Science (miscellaneous)

CiteScore

4.00

自引率

0.00%

发文量

审稿时长

8 weeks

期刊介绍： The Journal of Membrane Science and Research (JMSR) is an Open Access journal with Free of Charge publication policy, which provides a focal point for academic and industrial chemical and polymer engineers, chemists, materials scientists, and membranologists working on both membranes and membrane processes, particularly for four major sectors, including Energy, Water, Environment and Food. The journal publishes original research and reviews on membranes (organic, inorganic, liquid and etc.) and membrane processes (MF, UF, NF, RO, ED, Dialysis, MD, PV, CDI, FO, GP, VP and etc.), membrane formation/structure/performance, fouling, module/process design, and processes/applications in various areas. Primary emphasis is on structure, function, and performance of essentially non-biological membranes.