HYBRIDIZATION OF ANTOCYANIN DYES FROM PURPLE CABBAGE WITH SYNTHETIC SAPONITE: EFFECTS OF ALUMINUM ION ON COLOR STABILIZATION

Sakurako Inoue; Hinano Kodama; Takuya Kan; Takumi Shimada; Kazuyoshi Takimoto; Kenji Tamura; Masayuki Kamei; Akihiko Yamagishi; Hisako Sato

doi:10.11362/jcssjclayscience.MS-21-8

Papers

HYBRIDIZATION OF ANTOCYANIN DYES FROM PURPLE CABBAGE WITH SYNTHETIC SAPONITE: EFFECTS OF ALUMINUM ION ON COLOR STABILIZATION

Sakurako Inoue, Hinano Kodama, Takuya Kan, Takumi Shimada, Kazuyoshi Takimoto, Kenji Tamura, Masayuki Kamei, Akihiko Yamagishi, Hisako Sato

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Sakurako Inoue
Ehime University Senior Hight School
Hinano Kodama
Ehime University Senior Hight School
Takuya Kan
Ehime University Senior Hight School
Takumi Shimada
Graduate School of Science and Engineering, Ehime University
Kazuyoshi Takimoto
Graduate School of Science and Engineering, Ehime University
Kenji Tamura
Research Center for Functional Materials, National Institute of Materials Science
Masayuki Kamei
Research Center for Functional Materials, National Institute of Materials Science
Akihiko Yamagishi
Research Center for Functional Materials, National Institute of Materials Science
Hisako Sato Corresponding author
Graduate School of Science and Engineering, Ehime University

Keywords: anthocyanin, Al³⁺ ion, purple cabbage, synthetic saponite

JOURNAL FREE ACCESS

2021 Volume 25 Issue 3-4 Pages 33-37

DOI https://doi.org/10.11362/jcssjclayscience.MS-21-8

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Abstract

Food loss is an important issue from the view-point of SDGs (Sustainable Development Goals) movement. Motivated by this trend, the present work manufactured a colored solid substance based on anthocyanin dyes contained in purple cabbages. Anthocyanin dyes were effectively extracted by ethanol under ultrasonic treatment. Various kinds of divalent and trivalent metal ions were added in order to tune color tone. As a result, Al³⁺ ion was found to stabilize blue color from original purple one. To achieve a solid form, extracted dyes were adsorbed by synthetic saponite. The resultant hybrid compounds consisting of anthocyanins, Al³⁺ and synthetic saponite were analyzed by means of XRD and diffusion reflection spectra. The stability of colored substances at higher temperature was examined.

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