Synthesis and swelling behaviors of Carboxymethyl
cellulose-g-poly((NIPA-co-AAC) Nanohydrogels
Reem K. Farag* and Shimaa M. Elsaeed
Egyptian Petroleum Research Institute, Nasr City, 11727 Cairo, Egypt
E.mail: reem_kamal.kamel2009@yahoo.com
Super nano absorbents were synthesized by graft copolymerization of acrylic acid (AA)/
Nisopropylacrylamide (NIPA) onto carboxymethyl cellulose (CMC) by inverse microemulsion
polymerization using potassium persulfate (KPS) as a free radical initiator, N,N_methylenebisacrylamide (MBA) as a crosslinking agent and Aerosol (AOT) as a surfactant.
The structure and morphologies of the prepared nanogels were characterized by Fourier
transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA).TEM and scanning
electron microscope (SEM). Superabsorbent comprised a porous crosslink structure of CMC
with side chains that carry carboxamide. The swelling behaviors of the nanogels were
dependant on the pH of external solutions, particle size and the concentration of the salt
solution. The nano hydrogel particles were very effective in the removal of arsenic from an
aqueous environment ~96% of the arsenic was removed in less than10 min from a 55ppm
aqueous stock solution.
Keywords: nanogels, superabsorbents, swelling behaviors and Carboxymethyl cellulose
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Figure 1 microemulsion polymerization scheme of the synthesis.
Figure 2: Purification of Drinking Water by removal of Arsenic ion