EFFECT OF SALT ON THE PROPERTY OF ADSORPTION IN THERMOSENSITIVE POLYMER HYDROGEL

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著者

    • SEIDA Yoshimi
    • Department of Environmental Chemical and Engineering, Interdisciplinary Graluate School of Science and Engineering, Tokyo Institute of Technology
    • NAKANO Yoshio
    • Department of Environmental Chemical and Engineering, Interdisciplinary Graluate School of Science and Engineering, Tokyo Institute of Technology

抄録

The effect of salt (NaCl, MgCl<SUB>2</SUB>, LiCl, NH<SUB>4</SUB>Cl, Na<SUB>2</SUB>SO<SUB>4</SUB>, MgSO<SUB>4</SUB>, (NH<SUB>4</SUB>)<SUB>2</SUB>SO<SUB>4</SUB>) on the adsorption properties of thermosensitive <I>N</I>-isopropylacrylamide hydrogel was studied using hydrophobic organic molecules as adsorbate. The effect of salt on the adsorption properties of the gel was evaluated in terms of the phase transition temperature <I>T<SUB>p</SUB></I> of the gel and the structure of water in the solution.<BR>The addition of salt increased the amount of adsorption of organic molecules onto the gel, while decreasing the phase transition temperature <I>T<SUB>p</SUB></I> of the gel. The addition of salt containing Cl<SUP>–</SUP> ions gave the gel larger adsorption capacity without decreasing the <I>T<SUB>p</SUB></I> of the gel significantly. On the contrary, the addition of salt containing SO<SUB>4</SUB><SUP>2–</SUP> ions increased the amount of adsorption, while decreasing the <I>T<SUB>p</SUB></I> of the gel substantially. The addition of salt affected enormously the structure of water in the salt solution. The amount of adsorption was enhanced with increasing fraction of bound water in the salt solution. The fraction of bound water in the solution containing Cl<SUP>–</SUP> ions was larger than that in the solution containing SO<SUB>4</SUB><SUP>2–</SUP> ions so that the amount of adsorption increased effectively in the solution containing Cl<SUP>–</SUP> ions. The effect of salt on the adsorption properties of thermosensitive polymer hydrogel is determined by both the <I>T<SUB>p</SUB></I> of the gel and the structure of water in the salt solution.

収録刊行物

  • Journal of chemical engineering of Japan

    Journal of chemical engineering of Japan 29(5), 767-772, 1996-10-20

    The Society of Chemical Engineers, Japan

参考文献:  7件中 1-7件 を表示

被引用文献:  2件中 1-2件 を表示

各種コード

  • NII論文ID(NAID)
    10003815352
  • NII書誌ID(NCID)
    AA00709658
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    00219592
  • データ提供元
    CJP書誌  CJP引用  J-STAGE 
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