Ion-Exchange Ability of Polyaniline-Polyvinyl Alcohol Colloids with Various Anions

Abstract

Polyaniline-polyvinyl alcohol (PAPVA) colloids consisting of polyaniline (PA) and polyvinyl alcohol (PVA) were prepared. This colloid is electrochemically active and can adsorb various anions. The adsorption occurs electrochemically or chemically. The selectivity sequence of the PAPVA colloid toward monovalent anions was SCN^->ClO₄^- >BF₄^->Br^->Cl^-_??_CF₃COO^-_??_C₆H₅SO₃^-. Adsorption ability of the PAPVA colloid toward each anion was enhanced when large anions such as C₆H₅SO₃^-, were doped into the colloid.