【摘 要】
：
Wool keratin( WK) and silk sericin( SS) have the ability to interact with metal ions. In order to take advantage of this potential, a novel environmentally friendly waterborne polyurethane ( WPU )/WK/SS membrane named as WPU & WK & SS membrane with crossl
【机 构】
：
Key Laboratory of Textile Science and Technology,Ministry of Education,Donghua University,Shanghai 2
论文部分内容阅读
Wool keratin( WK) and silk sericin( SS) have the ability to interact with metal ions. In order to take advantage of this potential, a novel environmentally friendly waterborne polyurethane ( WPU )/WK/SS membrane named as WPU & WK & SS membrane with crosslinked structure was constructed by freeze-drying via self-assembly style. Surface morphology and chemical structure characterization were investigated by scanning electron microscopy ( SEM ) and Fourier transform infrared spectroscopy ( FT-IR ) . In addition, the adsorption experiments of Cu2+ and Cr6+ were performed to evaluate the adsorption of WPU & WK & SS membrane, including adsorption kinetics, adsorption isotherm models and various factors affecting adsorption. Further investigation indicates that the maximum adsorption capacity of Cu2+ and Cr6+ can reach 54. 21 mg·g-1 and 85. 21 mg·g-1 , respectively, which are higher than most of the reported adsorbents. Through adsorption kinetics and thermodynamic analysis, it is find that the pseudo-second-order kinetic equation and the Langmuir adsorption isotherm model are more suitable for the static adsorption of Cu2+and Cr6+by WPU&WK&SS membrane.
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