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.
Original language | English |
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Pages (from-to) | 298-302 |
Number of pages | 5 |
Journal | kagaku kogaku ronbunshu |
Volume | 44 |
Issue number | 5 |
DOIs | |
Publication status | Published - 2018 |
Externally published | Yes |
Keywords
- Adsorption
- Caffeine
- Elution with hot water
- Radiation-induced graft polymerization
- Tannic acid-immobilized fiber
ASJC Scopus subject areas
- Chemistry(all)
- Chemical Engineering(all)