Premium
The interactions of ionic dye permeants with poly(vinyl alcohol) membranes
Author(s) -
Costich P. M.,
Osterhoudt H. W.
Publication year - 1974
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1974.070180318
Subject(s) - membrane , vinyl alcohol , congo red , cationic polymerization , chemistry , ionic bonding , polymer chemistry , acridine orange , solvent , methyl orange , electrolyte , chemical engineering , organic chemistry , adsorption , polymer , ion , apoptosis , biochemistry , electrode , photocatalysis , engineering , catalysis
The well‐known interaction between Congo Red and poly(vinyl alcohol), PVA, was studied by equilibrium dialysis. The diffusion of Congo Red into PVA membranes was much more rapid in 0.1 N NaCl solution than in water. The dye appeared to be practically immobilized by the membranes in both solvents. A short survey of the dialytic behavior of various classes of ionic dyes through PVA membranes with water as solvent was undertaken. Anionic dyes permeated the membranes only very slowly, whereas cationic dyes permeated the membranes relatively rapidly and dyed them considerably. The existence of negative charges on the PVA membranes was demonstrated by performing dialysis experiments with the anionic dye Orange II and the cationic dye Acridine Orange in water and in excess electrolyte (1 N NaCl).