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Preparation and characterization of crosslinked alginate–CMC beads for controlled release of nitrate salt

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Abstract

Carboxymethyl cellulose (CMC)/sodium alginate (SA) hydrogel beads were successfully prepared by Ca2+ ions crosslinking followed by gamma irradiation. The factors affecting beads formation are the composition of SA in the blend and concentration of calcium chloride as a crosslinking agent. The results indicated that the addition of CMC to SA increases the swelling (%) upto (1:3) (CMC:SA) ratio. The effect of different irradiation doses (2.5, 5, and 10 kGy) on swelling (%) was studied. At low doses, swelling (%) decreases upto 5 kGy then starts to increase at 10 kGy. The degree of the swelling (%) and release (%) of ammonium nitrate salt from beads were investigated under different pH (1.2, 5 and 7). The beads were characterized by FTIR, SEM and TGA to investigate molecular structure, morphology and thermal stability of beads.

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Authors and Affiliations

  1. National Center for Radiation Research and Technology, Atomic Energy Authority, Nasr City, P.O. Box 7551, Cairo, 11762, Egypt

    Sayeda M. Ibrahim, Faten I. Abou El Fadl & Amal A. El-Naggar

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  1. Sayeda M. Ibrahim
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  2. Faten I. Abou El Fadl
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  3. Amal A. El-Naggar
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Correspondence to Sayeda M. Ibrahim.

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Ibrahim, S.M., Abou El Fadl, F.I. & El-Naggar, A.A. Preparation and characterization of crosslinked alginate–CMC beads for controlled release of nitrate salt. J Radioanal Nucl Chem 299, 1531–1537 (2014). https://doi.org/10.1007/s10967-013-2820-4

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  • DOI: https://doi.org/10.1007/s10967-013-2820-4

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