Surface modification of ion‐exchange membranes: Methods, characteristics, and performance

Abstract

Considerable effort has been made to improve ion-exchange membrane (IEM) properties in order to achieve better performance of IEM-based processes in various applications. Surface modification is one of the effective ways to improve IEM properties. Various methods have been used to modify IEM surfaces, for example, plasma treatment, polymerization, solution casting, electrodeposition, and ion implantation. These methods are able to produce a thin and fine distributed layer and also to modify the chemical structure of the surface. The new layer can be adsorbed, deposited, or chemically bonded on a membrane surface. By using these methods, IEM properties are improved, and the desired or specific characteristics such as high monovalent ion permselectivity, low fuel crossover, and anti-organic-fouling property can be obtained. In this paper, methods for surface modification of IEMs are reviewed. Moreover, the effects of modification on IEM properties and performance are discussed.

Recent advances in waste lube oils processing technologies

“…Membrane-based processes have been widely used in various fields, such as water treatments [79][80][81][82][83][84][85][86][87], wastewater treatment [88,89], gas separation [90,91], energy conversion [92], medical and chemical processing [93][94][95][96][97], food processing and biotechnology [98][99][100][101][102], and so on, competing with conventional processes [81][82][83][103][104][105][106][107]. The rapid growth in development and application of membrane technologies is due to their interesting features.…”

Integrated Valorization of Desalination Brine through NaOH Recovery: Opportunities and Challenges

“…[36] Furthermore,they developed an ED model that could predict the desalination rate,l imiting current density,a nd energy consumption. [37] Khoiruddin et al have provided ar eview of current methods to modify ion-exchange membranes as well as their effects on the performance of the membranes; [38] however, ac omparative study of the modification methods would be beneficial to determine the optimal route for membrane production. By identifying how different materials interact with various ions,m embrane materials can be improved to efficiently transfer ions at alow energetic cost.…”

“…One group has shown the effectiveness of composite membranes prepared with sulfonated polyaniline and sulfonated polyether sulfone,w hich had as alt removal efficiency of 76.28 %. [37] Khoiruddin et al have provided ar eview of current methods to modify ion-exchange membranes as well as their effects on the performance of the membranes; [38] however, ac omparative study of the modification methods would be beneficial to determine the optimal route for membrane production.…”

Effects of hydrophilic/hydrophobic surfaces on polymer‐complexation kinetics

“…28 Therefore, the control of thickness of boundary film will be a key factor for practical design of polymer adsorbents. Due to difficulty in formulating the exact rate of ion exchange, this method will be also applicable to surface modification of ion-exchanger or ion-exchange membranes 29,30 by considering the flux of proton and metal ions. 11 Thus, we showed that modification of surface properties by hydrophilic/hydrophobic components directly affects the thickness of boundary film.…”