Preparation and Characterization of Biodegradable Gelatin-PAAm-Based IPN Hydrogels For Controlled Release Of Maleic Acid To Improve The Solubility Of Phosphate Fertilizers
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2016
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Abstract
In this study, interpenetrating polymer network (IPN) hydrogel systems including maleic acid (MA) were constituted to improve the solubility of phosphate fertilizers. A series of full and semi-IPN hydrogels were prepared from various gelatin/polyacrylamide mixtures by using two different cross-linkers. The effects of polymer composition on the morphological structures and swelling behaviors of the hydrogels were investigated. The swelling values of all hydrogels were found to be in between 435% and 830%. MA release from load0ed hydrogels was followed and it was determined that MA-loaded hydrogels efficiently decreased pH and improved the solubility of Ca-3(PO4)(2) in releasing medium.
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Controlled release, gelatin, interpenetrating network hydrogels, maleic acid, polyacrylamide