Effect of CaO in the thermal crosslinking of maltodextrin and citric acid: A cooperative action of condensation and ionic interactions

Abstract

The study of the effect of CaO in the thermal crosslinking of maltodextrin with citric acid demonstrates that the addition of small amount of this compound enhances the crosslinking of the cured system under processing conditions. This enhancement of the crosslinking leads to a noticeable improvement of the mechanical properties. The mechanism of the enhanced crosslinking reaction has been deeply analyzed by rheology, FT‐IR, and TGA. The rheological results show that CaO contributes to the crosslinking. This contribution would allow decreasing 10 °C the temperature of curing process. The enhancement of the crosslinking and consequent improvement of mechanical properties is explained by the contribution of the interactions between the Ca2+ and citric acid and the polycondensate network formed between maltodextrin and citric acid. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 44203.

Characterization, Disintegration, and Dissolution Analyses of Carrageenan-Based Hard-Shell Capsules Cross-Linked with Maltodextrin as a Potential Alternative Drug Delivery System

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Spray-dried Spirulina platensis as an effective ingredient to improve yogurt formulations: Testing different encapsulating solutions

“…Moreover, when combined with citric acid and after thermal heating, it forms a polymeric network (crosslinking) due to the esterification reaction between the hydroxyl groups of maltodextrin and the carboxyl groups of citric acid (Castro-Cabado, Parra-Ruiz, Casado, & San Román, 2016). In addition to increasing the thermal and mechanical resistance (Castro-Cabado, Casado, & San Román, 2016b), these crosslinking reactions preserve the bioactivity of the encapsulated agents (Francisco et al, 2018).…”

Enhancement of Starch Gel Properties Using Ionic Synergistic Multiple Crosslinking Extrusion Modification

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“…FTIR analysis was performed in triplicate for samples using an FT-IR spectrophotometer-equipped Spectrum 100 (Thermo Fisher Scientific, Norwalk, CA, USA) with attenuated total reflection (ATR) [ 16 ].…”