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

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  • 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
  • タンニンサン コテイ センイ オ モチイタ カフェイン キュウチャク ト ネッスイ ニ ヨル カフェイン ノ ヨウリ

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<p>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.</p>

Journal

  • KAGAKU KOGAKU RONBUNSHU

    KAGAKU KOGAKU RONBUNSHU 44 (5), 298-302, 2018-09-20

    The Society of Chemical Engineers, Japan

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