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Paper Information

Journal:   IRANIAN JOURNAL OF POLYMER SCIENCE AND TECHNOLOGY (PERSIAN)   DECEMBER 2011-JANUARY 2012 , Volume 24 , Number 5 (ISSUE NUMBER 115); Page(s) 414 To 423.
 
Paper: 

ALGINATE-BASED HYDROGEL NANOCOMPOSITES MADE BY CARBON NANOTUBES AND ACRYLAMIDE/ITACONIC ACID AS CO-MONOMERS

 
 
Author(s):  BAGHERI MARANDI GHOLAM*, MAHMOODPOOR SHARBIAN LILA
 
* DEPARTMENT OF CHEMISTRY, ISLAMIC AZAD UNIVERSITY, KARAJ BRANCH, KARAJ, IRAN
 
Abstract: 

Hydrogel nanocomposites based on alginate polysaccharide were prepared by graft copolymerization of acrylamide and itaconic acid in the presence of carbon nanotube, using methylene bisacrylamide and ammonium persulfate as crosslinker and initiator, respectively. The synthesized samples were characterized by infrared spectroscopy, thermogravimetric analysis and scanning electron microscopy. The effect of carbon nanotube content on some properties of the nanocomposites was investigated. The results showed that with increasing carbon nanotube content, the rate of water absorbency and equilibrium swelling in distilled water decreased whereas in saline solutions the water absorbency increased. Water retention capacity was also studied and the results indicated that the inclusion of carbon nanotube causes an increase in water retention under heating and loud. Furthermore, the possibilities of Cd (II) ion adsorption of samples have been investigated. It was found that incorporation of nanotubes into the hydrogel structure increased the Cd (II) metal ion adsorption capacity of the nanocomposites compared to a free-carbon nanotube sample. It is concluded that the hydrogels can be used as fast-responsive and high capacity sorbents in Cd (II) ion removing processes.

 
Keyword(s): HYDROGEL NANOCOMPOSITE, ALGINATE, CARBON NANOTUBE, SWELLING, CADMIUM
 
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