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Preparation and acid dye adsorption behavior of polyurethane/chitosan composite foams

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Abstract

We prepared a series of polyurethane(PU)/chitosan composite foams with different chitosan content of 5∼20 wt% and investigated their adsorption performance of acid dye (Acid Violet 48) in aqueous solutions with various dye concentrations and pH values. It was observed that PU/chitosan composite foams exhibited well-developed open cell structures. Dye adsorption capacities of the composite foams increased with the increment of chitosan content in composite foams, because amine groups of chitosan serve as the binding sites for sulfonic ions of acid dyes in aqueous solutions. In addition, dye adsorption capacities of composite foams were found to increase with decreasing the pH value, which stems from the fact that the enhanced chemisorption between protonated amine groups of chitosan and sulfonic ions of acid dye is available in acidic solutions. The dye adsoption kinetics and equilibrium isotherm of the composite foams were well described with the pseudo-second order kinetic model and Langmuir isotherm model, respectively. The maximum adsorption capacity (q max) for the PU/chitosan composite foams with 20 wt% chitosan content is evaluated to be ca. 30 mg/g.

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Authors and Affiliations

  1. School of Advanced Materials and System Engineering, Kumoh National Institute of Technology, Gumi, 730-701, Korea

    Ho Cheon Lee, Young Gyu Jeong, Byung Gil Min & Sang Cheol Lee

  2. School of Textiles, Yeungnam University, Gyeongsan, 712-749, Korea

    Won Seok Lyoo

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  1. Ho Cheon Lee
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  2. Young Gyu Jeong
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  3. Byung Gil Min
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  4. Won Seok Lyoo
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  5. Sang Cheol Lee
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Correspondence to Sang Cheol Lee.

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Lee, H.C., Jeong, Y.G., Min, B.G. et al. Preparation and acid dye adsorption behavior of polyurethane/chitosan composite foams. Fibers Polym 10, 636–642 (2009). https://doi.org/10.1007/s12221-010-0636-1

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  • DOI: https://doi.org/10.1007/s12221-010-0636-1

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