Comparative study on physicochemical properties of starch films prepared from five sweet potato (Ipomoea batatas) cultivars

Hong geon Song, Inyoung Choi, Jung Soo Lee, Mi Nam Chung, Chan Suk Yoon, Jaejoon Han

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Five different sweet potato (Ipomoea batatas) cultivars (Daeyumi, Gogeonmi, Sincheonmi [SCM], Singeonmi, and Sinyulmi [SYM]) were used to extract sweet potato starch (SPS) for developing starch-based films. After the chemical composition and amylose contents of all SPSs were evaluated, the morphological, moisture, mechanical, and barrier properties of the SPS-based films were investigated. As one of the film characteristics, the X-ray diffractograms revealed that the SCM-based film with the highest amylose content (26.34%) had the highest relative crystallinity (24.31%). The SCM-based film also showed higher tensile strength (3.05-fold) and elastic modulus (2.38-fold) than the SYM-based film with the lowest amylose content (21.84%). The water vapor and oxygen permeabilities of the SPS-based films were negatively correlated with the amylose content. Thus, the SCM-based film was less permeable for water vapor (3.16-fold) and oxygen (1.81-fold) than the SYM-based film. These results demonstrated that the sweet potato cultivar, especially the amylose content, plays a significant role in determining the physicochemical properties of the SPS-based films.

Original languageEnglish
Pages (from-to)758-767
Number of pages10
JournalInternational Journal of Biological Macromolecules
Volume189
DOIs
Publication statusPublished - 2021 Oct 31

Keywords

  • Physicochemical properties
  • Starch film
  • Sweet potato cultivar

ASJC Scopus subject areas

  • Structural Biology
  • Biochemistry
  • Molecular Biology
  • Economics and Econometrics
  • Energy(all)

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