Modification of Ultrafiltration Membranes Based on Polyacrylonitrile

被引：0

作者：

K. S. Burts ^{[1
]}

M. V. Krasnova ^{[1
]}

M. S. Makarava ^{[1
]}

A. L. Yaskevich ^{[1
]}

T. V. Plisko ^{[1
]}

E. A. Nazarov ^{[1
]}

A. V. Bildyukevich ^{[1
]}

机构：

[1] Institute of Physical Organic Chemistry, National Academy of Sciences of Belarus, Minsk

来源：

Membranes and Membrane Technologies | 2024年 / 6卷 / 5期

关键词：

casting solution; coagulation bath; polyacrylic acid; polyacrylonitrile; polyethyleneimine; ultrafiltration;

D O I：

10.1134/S2517751624600778

中图分类号：

学科分类号：

摘要：

Abstract: Three methods for modification of polyacrylonitrile (PAN) ultrafiltration membranes with polyelectrolytes are considered: (1) bulk modification by introducing polyacrylic acid (PAA) into the casting solution, (2) surface modification by using aqueous solutions of polyethyleneimine (PEI) as a coagulation bath, and (3) a combination of methods 1 and 2. In all three cases, modification of membranes with polyelectrolytes leads to effective hydrophilization of the surface of ultrafiltration membranes (the contact angle decreases from 41° to 15°–25°). It has been found that the bulk modification of PAN membranes by introducing 0.05–0.2 wt % PAA into the casting solution leads to a decrease in the pure water flux from 110 to 96 L/m2 h. The maximum polyvinylpyrrolidone K30 rejection coefficient of 96% was observed at a PAA concentration of 0.05 wt %; with a subsequent increase in the PAA content, the rejection coefficient decreases to 70–73%. Surface modification of PAN membranes with polyethyleneimine leads to a more than twofold increase in their water flux (up to 233–294 L/m2 h), while the rejection coefficient for polyvinylpyrrolidone K30 was 82–96% depending on the PEI concentration in the coagulation bath. It is shown that the combined modification method reduces the water flux to 44 L/m2 h, which is associated with the formation of a polyelectrolyte complex and compaction of the membrane structure. It has been found that the combined modification method allows obtaining ultrafiltration PAN membranes with a high flux recovery ratio after filtration of model solutions of polyvinylpyrrolidone (73–100% compared to 65% for the unmodified membrane) and humic acids (80% compared to 73% for the unmodified membrane). © Pleiades Publishing, Ltd. 2024.

引用

页码：299 / 309

页数：10

共 56 条

[1] Wang S., Yin L., Dai J., Chen P., Liu Z., Zhao X., Chen C., Zhou H., J. Environ. Chem. Eng, 11, (2023)
[2] Yu H., Cao Y., Kang G., Liu Z., Kuang W., Liu J., Zhou M., J. Appl. Pol. Sci, 132, (2015)
[3] Zhao Y., Liao Y., Lai G.S., Yin Y., Wang R., J. Memb. Sci, 685, (2023)
[4] Dmitrenko M., Liamin V., Kuzminova A., Mazur A., Lahderanta E., Ermakov S., Penkova A., Polymers, 12, (2020)
[5] Ahmad T., Guria C., Mandal A., J. Ind. Eng. Chem, 90, (2020)
[6] Penkova V., Dmitrenko M.E., Ermakov S.S., Toikka A.M., Roizard D., Environ. Sci. Pollut. Res, 25, (2018)
[7] Wardani K., Ariono D., Subagjo, and I. G. Wenten, Polym. Adv. Technol, 30, (2019)
[8] Gryta M., Wozniak P., Desalination, 574, (2024)
[9] Plisko T.V., Burts K.S., Bildyukevich A.V., Membranes, 12, (2022)
[10] Otvagina K.V., Penkova A.V., Dmitrenko M.E., Kuzminova A.I., Sazanova T.S., Vorotyntsev A.V., Vorotyntsev I.V., Membranes, 9, (2019)

← 1 2 3 4 5 6 →