TY - JOUR

T1 - Pervaporation Efficiency of Composite Membranes Based on Sodium Alginate Polyelectrolyte Complex as a Function of Preparation Method

AU - Якимова, Нина Михайловна

AU - Дмитренко, Мария Евгеньевна

AU - Михайловская, Ольга Алексеевна

AU - Кузьминова, Анна Игоревна

AU - Пенькова, Анастасия Владимировна

N1 - M. Dmitrenko, *, O. Mikhailovskaya, A. Kuzminova, N. Yakimova, S. Shipilovskikh, and A. Penkova. Pervaporation Efficiency of Composite Membranes Based on Sodium Alginate Polyelectrolyte Complex as a Function of Preparation Method // Membranes and Membrane Technologies, 2025, Vol. 7, No. 5, pp. 270–279. 2 tabl., 5 ris., 37 references

PY - 2025/11/1

Y1 - 2025/11/1

N2 - The unique size-dependent properties of nano-objects make them valuable building blocks for creating advanced chemical systems, facilitating breakthroughs in different areas. In pervaporation, compositemembranes with a thin selective nano-sized layer are being actively developed, allowing a highly efficient separation of different mixtures. In this study, highly efficient composite membranes were developed by creationof a thin dense selective layer from polyelectrolyte complex (PEC) from sodium alginate (SA) and polyethylenimine (PEI). Composite PEC membranes were prepared by three methods: (1) physical adsorption, (2) by layer-by-layer (Lbl) technique and (3) in a dynamic mode. The structure of the thin selective layer ofmembranes were studied by scanning electron (SEM) and atomic force (AFM) microscopies. The physical adsorption method is the most effective for obtaining highly efficient composite membranes from PEС: 0.05–1.18 kg/(m2h) permeation flux and more than 95 wt % water in the permeate in pervaporation dehydration of ethanol (4–70 wt % water).

AB - The unique size-dependent properties of nano-objects make them valuable building blocks for creating advanced chemical systems, facilitating breakthroughs in different areas. In pervaporation, compositemembranes with a thin selective nano-sized layer are being actively developed, allowing a highly efficient separation of different mixtures. In this study, highly efficient composite membranes were developed by creationof a thin dense selective layer from polyelectrolyte complex (PEC) from sodium alginate (SA) and polyethylenimine (PEI). Composite PEC membranes were prepared by three methods: (1) physical adsorption, (2) by layer-by-layer (Lbl) technique and (3) in a dynamic mode. The structure of the thin selective layer ofmembranes were studied by scanning electron (SEM) and atomic force (AFM) microscopies. The physical adsorption method is the most effective for obtaining highly efficient composite membranes from PEС: 0.05–1.18 kg/(m2h) permeation flux and more than 95 wt % water in the permeate in pervaporation dehydration of ethanol (4–70 wt % water).

KW - polyelectrolyte complex, sodium alginate, polyethyleneimine, pervaporation, layer-by-layer method, dynamic deposition

U2 - 10.1134/S2517751625600785

DO - 10.1134/S2517751625600785

M3 - Article

VL - 7

SP - 270

EP - 279

JO - Membranes and Membrane Technologies

JF - Membranes and Membrane Technologies

SN - 2517-7516

IS - 5

ER -