Development and Performance of a Novel Molecular Imprinted Thermosensitive Gel with a Cross-linked Chelating Group for the Temperature Swing Adsorption of a Target Metal

• Tokuyama Hideaki

  Department of Chemical Engineering, Graduate School of Engineering, Nagoya University

• Fujioka Masaru

  Department of Chemical Engineering, Graduate School of Engineering, Hiroshima University

• Sakohara Shuji

  Department of Chemical Engineering, Graduate School of Engineering, Hiroshima University

Abstract

Molecular imprinted thermosensitive gels adsorb and/or desorb a specific heavy metal by taking advantage of temperature swing, resulting from the reconstruction/destruction of a multi-point adsorption site corresponding to the shrinking/swelling of the gel network. Imprinted gels were prepared by copolymerizing N-isopropylacrylamide (NIPA) as a thermosensitive component, a chelating monomer and a cross-linker by means of a molecular imprinting technique using Cu(II) ions as a template. Two types of chelating monomers were used in this study, N-4-(vinylbenzyl)ethylenediamine (VBEDA) and N,N′-di(4-vinyl)benzylethylenediamine (DVBEDA), which contain single and dual vinyl groups, respectively. DVBEDA, a novel chelating monomer, was developed to improve the performance of the gel, and the performances of the NIPA-DVBEDA and NIPA-VBEDA gels were compared. Both imprinted gels repeatedly adsorbed and desorbed Cu by virtue of a temperature swing between 30 and 10°C, where the variations in the amounts of Cu adsorbed on the NIPA-DVBEDA gels were larger than those on the NIPA-VBEDA gels. Both of the imprinted gels selectively adsorbed Cu, which was used as a template molecule, from a solution of Cu, Ni and Zn, where NIPA-DVBEDA had a higher selectivity than NIPA-VBEDA. The improved performance of the NIPA-DVBEDA gels can be attributed to critical control of the reconstruction/destruction of the multi-point adsorption site given by the cross-linking of the DVBEDA on the gel network. The Langmuir parameter describing the equilibria of temperature swing adsorption also indicated that the imprinted NIPA-DVBEDA gels were high-performance in nature.

Journal

• JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

  JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 38 (8), 633-640, 2005

  The Society of Chemical Engineers, Japan

Keywords

• Thermosensitive Gel
• Temperature Swing Adsorption
• Molecular Imprinting Technique
• <I>N</I>-Isopropylacrylamide
• Heavy Metal

Details

• CRID: 1390001204568550656
• NII Article ID: 10019037276
• NII Book ID: AA00709658
• DOI: 10.1252/jcej.38.633
• ISSN: 18811299
• ISSN: 00219592
• NDL BIB ID: 7393907
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7393907
• Web Site: http://www.jstage.jst.go.jp/article/jcej/38/8/38_8_633/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed