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Effects of a bolaform electrolyte on the sorption of acid dyes by a nylon 6 film
Author(s) -
Hamada Kunihiro,
Haizuka Hiroshi,
Yamazaki Ayumi
Publication year - 1998
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/(sici)1097-4628(19980912)69:11<2247::aid-app17>3.0.co;2-w
Subject(s) - sorption , electrolyte , acid dye , chemistry , aqueous solution , nylon 6 , polymer chemistry , inorganic chemistry , chemical engineering , nuclear chemistry , organic chemistry , adsorption , dyeing , polymer , electrode , engineering
The sorption behavior of acid dyes by a nylon 6 film was investigated in the presence and absence of a bolaform electrolyte. The time dependence of the sorption changed with the pH values of the dye bath. At pH 3, equilibrium sorption was not established even after the immersion of the film in the aqueous dye solutions for 7 days, while at pH 4 and in pure water, equilibrium sorption was established after the immersion for 1 day. The sorption isotherms were determined and analyzed by means of the bimodal sorption equation. The sorption parameters thus determined were greatly affected by the dye structure and the pH values. The addition of the bolaform electrolyte reduced the amounts of dye sorbed by the nylon 6 film. This is believed to be due to the formation of the complexes between the dyes and the bolaform electrolyte in the dye bath. Thus, the bolaform electrolyte retards the sorption through the formation of the complexes. © 1998 John Wiley & Sons, Inc. J Appl Polym Sci 69: 2247–2254, 1998