Desalination by electrodialysis with the ion-exchange membrane prepared by radiation-induced graft polymerization

Radiation-Induced Graft Polymerization of Glycidyl Methacrylate onto Nonwoven Polypropylene

“…It was shown that efficient GMA grafting can be achieved in methanol, 1,4-dioxane, and water3 methanol (1 : 1 by weight) system. Choi et al [12,13] noted a higher efficiency of grafting in the GMA3 1,4-dioxane system, but their results did not differ essentially from those for the GMA3methanol system. In this study, we grafted the GMA chains onto nonwoven fabric made of polypropylene fibers in the GMA3 methanol system, since methanol is relatively inexpensive and readily available.…”

Surface Modification by Graft Polymerization

“…Surface modification with γ-ray irradiation can be performed in three ways: pre-irradiation (Choi et al, 2001;Siu et al, 2006;Zhang and Jin, 2006), peroxidation (Kang et al, 2001) and a mutual irradiation technique (Filho and Gomes, 2006;Hegazy et al, 2000a;Hsiue et al, 1988;Yang and Hsiue, 1990). Therefore it is also an interesting way to modify membranes with various vinyl monomers for desired functions.…”

In Separation and Purification

“…Choi et al studied the desalination of water by ED with two types of IEMs prepared by the radiation grafting of GMA onto PE and PP nonwoven fabrics followed by treatment of the obtained grafts with triethylamine (TEA) and phosphoric acid [90] . Currently, research is focusing on addressing the remaining unsolved issues such as membranes organic fouling, selective permeability for specifi c ions, and instability of quaternary ammonium exchange groups in alkaline solution in anion exchange membranes [84,91,92] .…”