チロシン樹脂膜の性質について

概要

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In order to study the properties of the amphoteric ion-exchange membrane, the author synthesized the tyrosine resin membrane from tyrosine, phenol, formalin, and sodium hydroxide catalyser. The membrane which is produced from the mix of the molar ratio of tyrosine 1: phenol 2: formalin 8 is mechanically stable enough to be of good practical use, and it has an exchange capacity of 1.62 m. eq. cation/gr and that of 1.12 m. eq. anion/gr. The experiment of membrane adsorption is made in the solutions of various pHs containing the metallic ions Ca^<2+>, Mg^<2+>, Co^<2+>, and Cu^<2+>. The membrane adsorption of these ions becomes greater with the increase of pH value. In particular, Cu^<2+> is more greatly adsorbed than the other ions. After soaking the membrane in the buffer solutions of various pHs, membrane potential is measured, by the use of which the isoelectric point of the tyrosine-resin membrane is determined. It is found to be approximately pH 5〜6. In a Na^+-Ca^<2+> mixed salt solution and a K^+-Ca^<2+> mixed salt solution respectively, the relative transport number of the ions is measured by cataphoresis through the tyrosine resin membrane. Their relative transport number is larger in the case of K^+ than in the case of Na^+.
福岡女子大学の論文
1971-10-00