Cation release from different carboxymethyl cellulose hydrogels

Abstract Biodegradable hydrogels have great potential in agriculture. In this study, hydrogel prototypes of biodegradable slow-release fertilizers were formulated by a Schiff base reaction between dialdehyde carboxymethyl cellulose and gelatin. The release behavior iron cations from these cellulose-based with different degrees substitution was studied. analyses the relation correlation length cross-linked degree substitution, i.e., amount negatively charged positions hydrogels, allowed to determine influence structure electrostatic interaction on cation kinetics, which successfully described Peleg’s Model. lowest reveals slowest due smallest length. These results demonstrate that is dominant for divalent cations. Moreover, also shows DACMC-Gelatin as matrix fertilizers.