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Article Dans Une Revue Polymers Année : 2023

Influence of alginate properties and calcium chloride concentration on alginate bead reticulation and size : a phenomenological approach

Résumé

Two types of alginates, AlgLF and AlgP, were used in this study to produce alginate beads by electro-vibratory extrusion. AlgLF and AlgP exhibited different Mannuronate/Guluronate (M/G) ratios and molecular weights as measured by NMR and SEC-MALS. The calcium chloride concentration was found to have the greatest effect on bead size. Higher concentrations resulted in smaller beads. AlgLF with a higher molecular weight and a lower proportion of G blocks showed smaller beads. For both alginates, the bead size was also influenced by the flow rate and vibration frequency. Alginate solution aging showed a minimal effect. Alginate reticulation was modeled using a mathematical equation. The study provides insights for the optimization of alginate-based materials in different applications by shedding light on the main factors influencing bead size. The importance of the molecular weight, M/G ratio and calcium ion concentration in the gelling process is highlighted, providing opportunities for the tailoring of alginate materials through a phenomenological model.
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hal-04308516 , version 1 (27-11-2023)

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Chanez Bennacef, Stéphane Desobry, Jordane Jasniewski, Sébastien Leclerc, Laurent Probst, et al.. Influence of alginate properties and calcium chloride concentration on alginate bead reticulation and size : a phenomenological approach. Polymers, 2023, 15, pp.4163. ⟨10.3390/polym15204163⟩. ⟨hal-04308516⟩
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