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Grafted CMC/silica gel superabsorbent composite: Synthesis and investigation of swelling behavior in various media
Author(s) -
Pourjavadi A.,
Seidi F.,
Salimi H.,
Soleyman R.
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.27998
Subject(s) - swelling , distilled water , materials science , acrylic acid , composite number , scanning electron microscope , chemical engineering , swelling capacity , polymer chemistry , fourier transform infrared spectroscopy , composite material , chemistry , copolymer , polymer , chromatography , engineering
In the present study, we attempt to synthesize and characterize novel CMC‐ g ‐poly (acrylic acid‐ co ‐2‐acrylamido‐2‐methylpropanesulfonic acid)/silica gel composite. Infrared spectroscopy and TGA thermal analysis were carried out to confirm the chemical structure of the hydrogel. Moreover, morphology of the samples was examined by scanning electron microscopy. The effect of reaction variables affecting on water absorbency of the composite and swelling behavior in various solvents, salt, and pH solutions was investigated. Maximum water absorbency of the optimized final product was found to be 4000 g/g in distilled water. The absorbency under load (AUL) of the hydrogel was also determined by using an AUL tester at various applied pressures. Finally, dynamic swelling kinetics of the hydrogel was studied. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008