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The Chelating Properties Of Chitosan Fibers

Y. Qin
Published 1993 · Chemistry

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Chitosan fibers were treated with aqueous solutions of CuSO4 and ZnSO4 for different periods of time to prepare samples containing different levels of metal-ion contents. The effect of metal ions on the tensile properties of chitosan fibers was studied. It was found that after chelation of metal ions the chitosan fibers gained substantial increases in both dry and wet strengths. The metal ions were readily removed from the chitosan fibers by treatment with an aqueous EDTA solution. The effect of the degree of acetylation on the chelating ability of the chitosan fibers was also studied. It was found that after acetylation the chitosan fibers lost the chelating ability due to the conversion of primary amine groups to acetamide groups. © 1993 John Wiley & Sons, Inc.



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