TY - JOUR

T1 - Membranes from polyelectrolyte complex of PSS/PDADMAC modified with graphene oxide for enhanced nanofiltration water treatment

AU - Дмитренко, Мария Евгеньевна

AU - Михайловская, Ольга Алексеевна

AU - Дубовенко, Роман Русланович

AU - Мазур, Антон Станиславович

AU - Кузьминова, Анна Игоревна

AU - Семенов, Константин Николаевич

AU - Ермаков, Сергей Сергеевич

AU - Пенькова, Анастасия Владимировна

PY - 2025/12/19

Y1 - 2025/12/19

N2 - Water pollution, particularly industrial wastewater, is a major environmental issue due to its adverse effects. Sustainable wastewater treatment is one of the major challenges of this century, as well as sustainable production of polymer membranes for it. One of alternative methods is the production of polyelectrolyte complex (PEC) membranes based on aqueous phase separation approach. In this work, nanofiltration membranes from PEC of poly(sodium-p-styrenesulfonate) (PSS)/poly(diallyldimethylammonium chloride) (PDADMAC) with improved transport characteristics were developed via salt-dilution induced phase separation for enhanced water treatment from food anionic dyes and heavy metal ions. The improvement was carried out by variation of monomer ratio (40–60 wt% PSS), introduction of graphene oxide (GO, 3–7 wt%) and PSS with lower molecular weight (70 kDa) in PEC, and combination of all optimal modification conditions. The structural features of PEC-based membranes were studied by FTIR, NMR, Raman, XPS spectroscopies, scanning electron and atomic force microscopies, and thermogravimetric analysis. A theoretical analysis using quantum chemical calculations was carried out to confirm the influence of polymer interactions with components on changes in membrane properties. For PEC membranes with PSS/PDADMAC monomer ratio of 40/60, modified with 5 wt% GO and with the introduction of both PSS (70 kDa) with GO, led to more than 3.5 and 5 times higher permeance, respectively, and enhanced rejection compared to the unmodified PEC membrane in nanofiltration of dye and heavy metal ion solutions.

AB - Water pollution, particularly industrial wastewater, is a major environmental issue due to its adverse effects. Sustainable wastewater treatment is one of the major challenges of this century, as well as sustainable production of polymer membranes for it. One of alternative methods is the production of polyelectrolyte complex (PEC) membranes based on aqueous phase separation approach. In this work, nanofiltration membranes from PEC of poly(sodium-p-styrenesulfonate) (PSS)/poly(diallyldimethylammonium chloride) (PDADMAC) with improved transport characteristics were developed via salt-dilution induced phase separation for enhanced water treatment from food anionic dyes and heavy metal ions. The improvement was carried out by variation of monomer ratio (40–60 wt% PSS), introduction of graphene oxide (GO, 3–7 wt%) and PSS with lower molecular weight (70 kDa) in PEC, and combination of all optimal modification conditions. The structural features of PEC-based membranes were studied by FTIR, NMR, Raman, XPS spectroscopies, scanning electron and atomic force microscopies, and thermogravimetric analysis. A theoretical analysis using quantum chemical calculations was carried out to confirm the influence of polymer interactions with components on changes in membrane properties. For PEC membranes with PSS/PDADMAC monomer ratio of 40/60, modified with 5 wt% GO and with the introduction of both PSS (70 kDa) with GO, led to more than 3.5 and 5 times higher permeance, respectively, and enhanced rejection compared to the unmodified PEC membrane in nanofiltration of dye and heavy metal ion solutions.

KW - Graphene oxide

KW - Nanofiltration

KW - Poly(diallyldimethylammonium chloride)

KW - Polyelectrolyte complex

KW - Polystyrene sulfonate

KW - Water treatment

UR - https://www.mendeley.com/catalogue/6bfd4595-83b6-301a-a4c1-6239a0c3738f/

U2 - 10.1016/j.seppur.2025.134425

DO - 10.1016/j.seppur.2025.134425

M3 - Article

VL - 377

JO - Separation and Purification Technology

JF - Separation and Purification Technology

SN - 1383-5866

IS - 3

M1 - 134435

ER -