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The usability of (sodium alginate/acrylamide) semi‐interpenetrating polymer networks on removal of some textile dyes
Author(s) -
Şolpan Dilek,
Torun Murat,
Güven Olgun
Publication year - 2008
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.27945
Subject(s) - swelling , self healing hydrogels , aqueous solution , polymer , acrylamide , interpenetrating polymer network , fourier transform infrared spectroscopy , polymer chemistry , sodium alginate , diffusion , nuclear chemistry , polyelectrolyte , chemistry , sodium , materials science , chemical engineering , composite material , organic chemistry , copolymer , physics , engineering , thermodynamics
In this study, (sodium alginate/acrylamide) interpenetrating polymer networks ((NaAlg/AAm)IPN) have been prepared at definite composition. The aqueous solution of 3% (w/v) sodium alginate and 50% (w/v) acrylamide was irradiated with 60 Co‐γ rays at a dose rate of 0.07 kGy/h up to 5 kGy. The percent conversion was determined gravimetrically and 100% gelation was achieved at 5 kGy dose. To understand whether the semi‐interpenetrating polymer network of sodium alginate is performed, Fourier Transform Infrared (FTIR) spectra of polyacrylamide (PAAm), sodium alginate, and the semi‐interpenetrating polymer network were recorded. It is found that the FTIR spectra of PAAm, NaAlg, and the semi‐interpenetrating polymer network are different. The thermograms of PAAm, sodium alginate, and the semi‐interpenetrating polymer network were recorded for investigating their thermal character. (NaAlg/AAm)IPN hydrogels were immersed to swell in a solution of pH 7, at a temperature of 25°C. The swelling results at pH 7.0 indicated that (NaAlg/AAm)IPN hydrogel, containing 3% NaAlg showed maximum % swelling in water but swelling increased in the order of water > Magenta > Methylene Blue > Safranine‐O > Methyl Violet. Diffusion of water and aqueous solution of dyes within (NaAlg/AAm)IPN hydrogels was found to be of Fickian character at the initial stage of swelling with regard to values calculated for diffusion coefficient of (NaAlg/AAm)IPN hydrogels in water and aqueous solution of dyes. Some diffusion parameters were calculated from swelling of (NaAlg/AAm)IPN in water and dyes and their adsorption isotherms were plotted. In the adsorption experiments, the efficiency of (NaAlg/AAm)IPN hydrogels to adsorb Magenta, Safranine‐O, Methylene Blue, and Methyl Violet dyes from water was studied. (NaAlg/AAm)IPN hydrogels showed different adsorption for different aqueous solution of dyes at pH 7.0. Adsorption isotherms were constructed for (NaAlg/AAm)IPN‐dye systems. S type adsorption in the Giles classification system was found. Thermal and spectroscopic characterization of semi‐interpenetrating polymer network of sodium alginate and acrylamide and dye adsorbed semi‐interpenetrating polymer network of sodium alginate and acrylamide was recorded. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008