Effects of ultrasound-induced V-type rice starch-tannic acid interactions on starch in vitro digestion and multiscale structural properties

Research output: Contribution to journalJournal articleResearchpeer-review

  • Raza, Husnain
  • Siqian Li
  • Qian Zhou
  • Jiayi He
  • Ka Wing Cheng
  • Shuhong Dai
  • Mingfu Wang

V-type starch-polyphenol complexes, known for their improved physicochemical properties compared to native starch, are challenging to form efficiently. In this study, the effects of tannic acid (TA) interaction with native rice starch (NS) on digestion and physicochemical properties were investigated using non-thermal ultrasound treatment (UT). Results showed the highest complexing index for NSTA-UT3 (∼ 0.882) compared to NSTA-PM (∼0.618). NSTA-UT complexes reflected the V6I-type complex having six anhydrous glucose per unit per turn with peaks at 2θ = 7°, 13°, and 20°. The maxima of the absorption for iodine binding were suppressed by the formation of V-type complexes depending on the concentration of TA in the complex. Furthermore, rheology and particle size distributions were also affected by TA introduction under ultrasound, as revealed by SEM. XRD, FT-IR, and TGA analyses confirmed V-type complex formation for NSTA-UT samples, with improved thermal stability and increased short-range ordered structure. Ultrasound-induced addition of TA also decreased the hydrolysis rate and increased resistant starch (RS) concentration. Overall, ultrasound processing promoted the formation of V-type NSTA complexes, suggesting that tannic acid could be utilized for the production of anti-digestion starchy foods in the future.

Original languageEnglish
Article number125619
JournalInternational Journal of Biological Macromolecules
Volume246
Number of pages13
ISSN0141-8130
DOIs
Publication statusPublished - 2023
Externally publishedYes

Bibliographical note

Funding Information:
This work was supported by grants from the Shenzhen Science and Technology Program ( ZDSYS20220117155800001 ) and the National Key R & D Program of China [grant number: 2021YFD2100103 ].

Publisher Copyright:
© 2023

    Research areas

  • Physicochemical properties, Starch-polyphenol complex, Ultrasound

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