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Copper ions binding in cuāalginate gelation
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Abstract(s)
Alginate polysaccharide forms viscous aqueous dispersions and has the ability to form gels in the presence of divalent cations such as calcium and copper. In this work, we have studied cooper ions binding during Cuāalginate gelation, obtaining quantitative information about the amount and kinetics of cation binding. Our results indicate that copper binding during gelation occurs until a Langmuirātype equilibrium is reached between bound and free ions in the gelācontacting solution. The kinetics of metal ions binding can be modeled using Ritchie equationāderived models, allowing the prediction of ionic binding and gel formation temporal evolution. The ratio between cationic and polysaccharide quantities in the gelation system determines the kinetics of gelation and the characteristics of the gel formed. The experimental results and models applied in the work give more insights on alginate gelation and contribute to a reliable design and control of production methods for alginate gel structures.
Description
Keywords
Alginate Copper ions Gel Kinetics Langmuir model Biomaterials Research Subject Categories::NATURAL SCIENCES::Chemistry::Organic chemistry::Polymer chemistry Research Subject Categories::TECHNOLOGY::Bioengineering::Structural biochemistry
Citation
Publisher
Taylor & Francis