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Abstract
In this paper, the intercalated organic-montmorillonite (OMMT) was prepared by the cation exchange reaction, using N,N’-dimethyl-N-dodeoyl methacryloxylethyl ammonium bromide (DMAEA-DB) as an intercalation agent, which contain vinyl group. Then a novel poly (acrylic acid-co-acrylamide)/OMMT nanocomposite superabsorbent was synthesized by inverse suspension polymerization. The superabsorbent hydrogels prepared were characterized by X-ray diffraction (XRD) and FT-IR Spectrometer (FTIR). The effect of polymerization variables, including the amount of OMMT, cross-linker, initiator, acrylic acid (AA), and neutralization degree of AA, on water absorbency were investigate. Results showed that the intercalation was successful. OMMT dispersed in polymer molecules on a nanoscale after copolymerization. The water absorbency of the nanocomposite was much higher than that of the pure P(AA-AM). The highest absorbencies of nanocomposites for deionized water and saline water (0.9%) were 1100 mL/g and 87.5 mL/g, respectively.
ACKNOWLEDGMENTS
This study was supported by the Natural Science Foundation of Hubei Province (Project No. 2011CDB062), the Foundation of the Hubei Provincial Science and Technology Department (Project No. 2007AA101C29) and the Foundation of the Wuhan Science and Technology Bureau (Project No. 200710421120).
