タンニン酸固定繊維を用いたカフェイン吸着と熱水によるカフェインの溶離

山上 和馬; 松浦 佑樹; 河合（野間） 繁子; 梅野 太輔; 斎藤 恭一; 藤原 邦夫; 須郷 高信; 矢島 由莉佳; 日置 淳平; 塩野 貴史; 若林 英行

doi:10.1252/kakoronbunshu.44.298

Separation Engineering

Adsorption of Caffeine onto Tannic Acid-Immobilized Fiber and its Elution with Hot Water

Kazuma Yamagami, Yuki Matsuura, Shigeko Kawai-Noma, Daisuke Umeno, Kyoichi Saito, Kunio Fujiwara, Takanobu Sugo, Yurika Yajima, Junpei Hioki, Takashi Shiono, Hideyuki Wakabayashi

Author information

Kazuma Yamagami
Department of Applied Chemistry and Biotechnology, Chiba University
Yuki Matsuura
Department of Applied Chemistry and Biotechnology, Chiba University
Shigeko Kawai-Noma
Department of Applied Chemistry and Biotechnology, Chiba University
Daisuke Umeno
Department of Applied Chemistry and Biotechnology, Chiba University
Kyoichi Saito
Department of Applied Chemistry and Biotechnology, Chiba University
Kunio Fujiwara
KJK Co., Ltd.
Takanobu Sugo
KJK Co., Ltd.
Yurika Yajima
Kirin Co., Ltd.
Junpei Hioki
Kirin Co., Ltd.
Takashi Shiono
Kirin Co., Ltd.
Hideyuki Wakabayashi
Kirin Co., Ltd.

Keywords: Caffeine, Adsorption, Tannic Acid-Immobilized Fiber, Radiation-Induced Graft Polymerization, Elution With Hot Water

JOURNAL RESTRICTED ACCESS

2018 Volume 44 Issue 5 Pages 298-302

DOI https://doi.org/10.1252/kakoronbunshu.44.298

Details

Abstract

Tannic acid (TA) was immobilized onto nylon-6 fiber to adsorb caffeine. Glycidyl methacrylate (GMA) was graft-polymerized to gamma-ray-irradiated nylon-6 fiber and subsequently tannic acid was coupled with the epoxy groups of poly-GMA graft chain. The TA-immobilized fiber with a content of tannic acid of 25% exhibited an equilibrium amount of adsorbed caffeine of 3.1×10⁻² mmol per g of the fiber at a concentration of 1 mM of caffeine solution. The amount of caffeine adsorbed was quantitatively eluted with 50°C hot water. After the eighth cycle of adsorption and elution, the amount of caffeine adsorbed onto the TA-immobilized fiber was retained without any deterioration.

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