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Adsorption of anionic dyes on a reversibly swelling cationic superabsorbent polymer
Author(s) -
Bharti Shukla Neelesh,
Madras Giridhar
Publication year - 2012
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.37929
Subject(s) - swelling , cationic polymerization , adsorption , superabsorbent polymer , polymer chemistry , monomer , swelling capacity , self healing hydrogels , polymer , fourier transform infrared spectroscopy , chemistry , kinetics , chemical engineering , materials science , organic chemistry , composite material , physics , quantum mechanics , engineering
A cationic monomer [2‐(methacryloyloxy)ethyl]trimethylammonium chloride was polymerized using N , N ′‐methylenebisacrylamide as the crosslinker to obtain a cationic superabsorbent polymer (SAP). This SAP was characterized by Fourier transform‐infrared spectroscopy, and the equilibrium swelling capacity was determined by swelling in water. The SAP was subjected to cyclic swelling/deswelling in water and NaCl solution. The conductivity of the swelling medium was monitored during the swelling/deswelling and was related to the swelling/deswelling characteristics of the SAP. The adsorption of five anionic dyes of different classes on the SAP was carried out and was found to follow the first‐order kinetics. The Langmuir adsorption isotherms were found to fit the equilibrium adsorption data. The dye adsorption capacity of the SAP synthesized in this study was higher than that obtained for other hydrogels reported in the literature. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013