Effects of alginate synergized with polyphenol compounds on the retrogradation properties of corn starch

This study aimed to investigate the impact of alginate (AG) on the retrogradation properties of corn starch (CS) in conjunction with three phenolic compounds, including naringin (NA), rutin (RT), and soy isoflavones (SI). The findings indicated that AG, NA, RT, and SI collectively resulted in a significant reduction in the hardness, retrogradation enthalpy, and relaxation time of CS gel. This effect was more pronounced when compared to NA, RT, and SI individually. The findings suggested that the elemental system comprising AG, phenolic compounds, and CS yielded enhanced water retention capacity and thermal stability. Moreover, a noticeable decrease in the short-range ordered structure and crystallinity was observed, indicating that AG and phenolic compounds effectively inhibited the retrogradation of CS; notably, the synergistic interaction between AG and SI resulted in the most favorable outcome. The results of this study provide new ideas for the design, development, and quality improvement of starch-based food. [Display omitted] •AG and phenolic compounds effectively inhibited the retrogradation of CS.•AG, NA, RT, and SI showed a synergistic effect in adjusting the characteristics of CS gel.•AG-NA/RT/SI-CS ternary system has better thermal stability.•The elemental system AG-NA/RT/SI-CS yielded enhanced water retention capacity.•The synergistic effect between AG and SI was the best at inhibiting the retrogradation of CS.