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Reference type: Journal
Authors: Wang Y, Zhu SQ, Liao YY, Xiong XP
Article Title: A calcium ion-imprinted porous film prepared from a cellulose-alginate composite.
Publication date: 2014
Journal: Journal of Polymer Research
Volume: 21
Issue: (12)
Page numbers: Article No 612.
DOI: 10.1007/s10965-014-0612-3

Abstract: An ion-imprinted (IIP) film has been successfully prepared in this work. Firstly, mixture solution of cellulose and alginate was obtained by dissolving those polymers in a NaOH/urea aqueous solution. Then the mixture solution was cast onto glass plate and coagulated in CaCl2 aqueous solution bath to prepare a composite film. The matrix of the film was further fixed by cross-linking. Finally, the chelated Ca2+ in the matrix was removed to obtain the IIP film. The IIP film was characterized to show satisfactory mechanical properties, and to exhibit porous mesh network microstructure. The equilibrium swelling ratio of the IIP film was determined to be 700 %. The IIP film was immersed into Ca2+, Ca2+/Cu2+, Ca2+/Zn2+ and Ca2+/Mg2+ solutions to check the adsorption behavior, respectively. The results indicate that the IIP film displayed highly selective Ca2+ recognition, and the presence of additional cations had little effect on the Ca2+ recognition. Thus prepared Ca2+ imprinted film have potential applications in fields such as hard water softening, and Ca2+ enrichment or recognition
Template and target information: calcium ion, Ca(II)
Author keywords: Regenerate cellulose, sodium alginate, Porous film, Ion-imprinting, selective recognition


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