The Binding Properties of Metal Ions with Sulfonated Poly(Ether Ether Sulfone) (original) (raw)

Journal of electrical engineering and information science, 1999

Abstract

we determinated bonding constants for alkali metal cation (Li, Na, K) of the ion exchange resin of sulfonated poly(ether ether sulfone)(SPEES) in tetrahydrofurane(THF) and dioxane. As the polarity of a solvent increased and the reaction temperature decreased, the bonding constant became large. As the radii of metallic ion increased, the binding constant also increased in the order of Li(Ⅰ)<Na(Ⅰ)<K(Ⅰ). In the bonding reaction between SPEES ion exchanger and alkali picrate metal, the enthalpy of reaction ranged from -3.473 ~ -4.780 kcal/mol, while entropy ranged from 1.608~4.542 cal/Kㆍmol. Therefore it was spontaneous reaction due to the negative value of Gibb's free energy. When SPEES ion exchanger and alkali metal ion bind each other, they have good ion exchange capacity because of increasing the stability of the system.

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