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

IF 1.6 Q4 CHEMISTRY, PHYSICAL

Membranes and Membrane Technologies Pub Date : 2026-02-12 DOI:10.1134/S2517751625600785

M. Dmitrenko, O. Mikhailovskaya, A. Kuzminova, N. Yakimova, S. Shipilovskikh, A. Penkova

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Abstract

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, composite membranes 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 creation of 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 of membranes 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/(m² h) permeation flux and more than 95 wt % water in the permeate in pervaporation dehydration of ethanol (4–70 wt % water).

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海藻酸钠聚电解质复合物复合膜的渗透蒸发效率与制备方法的关系

纳米物体独特的尺寸依赖特性使其成为创造先进化学系统的宝贵基石，促进不同领域的突破。在渗透汽化中，具有选择性纳米层的复合膜正在被积极开发，允许不同混合物的高效分离。本研究通过海藻酸钠（SA）和聚乙烯亚胺（PEI）的聚电解质复合物（PEC）形成一层薄而致密的选择层，制备了高效的复合膜。采用三种方法制备复合PEC膜：(1)物理吸附，(2)逐层（Lbl）技术和(3)动态模式。利用扫描电子显微镜（SEM）和原子力显微镜（AFM）研究了膜的结构。在乙醇（4-70 wt %水）的渗透蒸发脱水过程中，通过PEС： 0.05-1.18 kg/(m2 h)的渗透通量和超过95 wt %的水，采用物理吸附法获得高效复合膜最为有效。

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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.