| Summary: | 碩士 === 國立中興大學 === 化學工程學系所 === 98 === In this study, polyvinyl alcohol-coated PET non-woven fabrics were prepared by crosslinking PVA with Borax onto the surface of PET non-woven fabrics, yielding a three-dimensional network structure. The PVA-coated PET non-woven fabrics were then activated by epoxidation, coupled with IDA (chelating agent), and loaded with Cu2+ to attain an immobilized metal affinity (IMA) absorbents. The effect of PVA concentration, activating agent concentration and activation time on the amount of chelated metal ion were analyzed by RSM (Response Surface Methodology) to decide the optimum values of independent factors for the best response value.
The results showed that the PET non-woven fabrics modified with molecular weight 90,000 of polyvinyl alcohol had mass ratio 90%, while the swelling ratio increased from 52% to 75%. The PVA-coated PET non-woven fabrics were easily distinguished from uncoated and coated preparation through SEM. It was found that when PVA concentration 6%, activating agent concentration 30% and, activation time 20hr, the amount of immobilized Cu2+ reached 78 mmol/m2. The results from RSM reveal the reliability for this study. Afterward, we show that the immobilized metal affinity (IMA) absorbents have the ability of. However, it was found that with increasing the concentration of PVA caused a block behavior on absorbents. Hence, it is necessary to keep a suitable porous size, or it will easy to lose the utility of protein adsorption from the prepared absorbents.
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