Influence of the Chemical Structure of Terminal Groups on the Properties of Poly(phenylene sulfone) Ultrafiltration Membranes

IF 2 Q4 CHEMISTRY, PHYSICAL Membranes and Membrane Technologies Pub Date : 2024-05-09 DOI:10.1134/s2517751624020069

D. N. Matveev, A. Yu. Raeva, A. A. Zhansitov, K. T. Shakhmurzova, Zh. I. Kurdanova, T. S. Anokhina, S. Yu. Khashirova, V. V. Volkov, I. L. Borisov

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Abstract

For the first time, poly(phenylene sulfones) (PPSFs) with chlorine and hydroxyl terminal groups are synthesized and tested for casting high-performance flat-sheet ultrafiltration membranes. The synthesis of PPSFs is carried out in dimethylacetamide at various ratios of 4,4'-dihydroxydiphenyl and 4,4-dichlorodiphenyl sulfone monomers. Two samples with the predominant content of hydroxyl (PPSF-ОН) and chlorine (PPSF-Cl) terminal groups are studied by NMR spectroscopy, GPC, and DSC methods. The coagulation values of polymer solutions in N-methyl-2-pyrrolidone (NMP) and the mechanical properties and hydrophilicity of polymer materials are determined. Both PPSF samples exhibit high tensile strength values at a level of 16 MPa. Using the method of precipitation of PPSF solutions in NMP with PEG-400 additives into water flat-sheet porous asymmetric membranes with a mesoporous (a pore diameter of about 7 nm) thin outer layer and fingerlike macropores in the substrate layer are obtained. An increase in the proportion of hydroxyl terminal groups enhances the hydrophilicity of the polymer. This, in turn, allows for the preparation of flat-sheet membranes from PPSF-ОН with a water permeability of 66 L/(m² h bar), which is 1.5 times higher than the water permeability of the PPSF-Cl membrane. Meanwhile, both membranes demonstrate a Blue Dextran (M_w = 70 000 g mol^–1) rejection of 99.9%.

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端基化学结构对聚苯砜超滤膜性能的影响

摘要首次合成并测试了具有氯和羟基末端基团的聚亚苯基砜（PPSFs），用于铸造高性能平板超滤膜。PPSFs 在二甲基乙酰胺中以不同比例的 4,4'-二羟基二苯砜和 4,4-二氯二苯砜单体进行合成。通过核磁共振光谱、GPC 和 DSC 方法对羟基（PPSF-ОН）和氯（PPSF-Cl）末端基团含量占主导地位的两种样品进行了研究。此外，还测定了聚合物溶液在 N-甲基-2-吡咯烷酮（NMP）中的凝固值以及聚合物材料的机械性能和亲水性。两种 PPSF 样品都显示出 16 兆帕的高拉伸强度值。通过将含有 PEG-400 添加剂的 NMP 中的 PPSF 溶液沉淀到水中的方法，获得了具有中孔（孔径约为 7 纳米）薄外层和指状大孔基底层的扁平片状多孔不对称膜。羟基末端基团比例的增加增强了聚合物的亲水性。这反过来又使 PPSF-ОН 制备的平板膜的透水性达到 66 升/（m2 h bar），是 PPSF-Cl 膜透水性的 1.5 倍。同时，这两种膜对蓝葡聚糖（Mw = 70 000 g mol-1）的排斥率都达到了 99.9%。

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来源期刊

Membranes and Membrane Technologies Multiple-

CiteScore

3.10

自引率

31.20%

发文量

期刊介绍： The journal Membranes and Membrane Technologies publishes original research articles and reviews devoted to scientific research and technological advancements in the field of membranes and membrane technologies, including the following main topics:novel membrane materials and creation of highly efficient polymeric and inorganic membranes;hybrid membranes, nanocomposites, and nanostructured membranes;aqueous and nonaqueous filtration processes (micro-, ultra-, and nanofiltration; reverse osmosis);gas separation;electromembrane processes and fuel cells;membrane pervaporation and membrane distillation;membrane catalysis and membrane reactors;water desalination and wastewater treatment;hybrid membrane processes;membrane sensors;membrane extraction and membrane emulsification;mathematical simulation of porous structures and membrane separation processes;membrane characterization;membrane technologies in industry (energy, mineral extraction, pharmaceutics and medicine, chemistry and petroleum chemistry, food industry, and others);membranes and protection of environment (“green chemistry”).The journal has been published in Russian already for several years, English translations of the content used to be integrated in the journal Petroleum Chemistry. This journal is a split off with additional topics.