Comparative study on physicochemical properties of starch films prepared from five sweet potato (Ipomoea batatas) cultivars
- Authors
- Song, Hong-Geon; Choi, Inyoung; Lee, Jung-Soo; Chung, Mi-Nam; Yoon, Chan Suk; Han, Jaejoon
- Issue Date
- 31-Oct-2021
- Publisher
- ELSEVIER
- Keywords
- Physicochemical properties; Starch film; Sweet potato cultivar
- Citation
- INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES, v.189, pp.758 - 767
- Indexed
- SCIE
SCOPUS
- Journal Title
- INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
- Volume
- 189
- Start Page
- 758
- End Page
- 767
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/135991
- DOI
- 10.1016/j.ijbiomac.2021.08.106
- ISSN
- 0141-8130
- 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.
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