高分子電解質のイオン架橋を利用した粒子の可逆的分散凝集制御  [in Japanese] Reversible Control Method for Particle Dispersion and Flocculation using Ionic Crosslinking of Polyelectrolytes  [in Japanese]

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Author(s)

    • 佐藤根 大士 SATONE Hiroshi
    • 兵庫県立大学大学院工学研究科化学工学専攻 Department of Chemical Engineering, Graduate School of Engineering, University of Hyogo
    • 飯村 健次 IIMURA Kenji
    • 兵庫県立大学大学院工学研究科化学工学専攻 Department of Chemical Engineering, Graduate School of Engineering, University of Hyogo
    • 鈴木 道隆 SUZUKI Michitaka
    • 兵庫県立大学大学院工学研究科化学工学専攻 Department of Chemical Engineering, Graduate School of Engineering, University of Hyogo
    • 那須 昭夫 NASU Akio
    • ㈱資生堂グローバルイノベーションセンター Global Innovation Center, Shiseido Company, Limited

Abstract

<p>スラリー状製品における保存時の粒子の沈降・堆積・固化防止と塗布時の低粘性実現のため,形成される堆積層は非常に疎で,なおかつ弱い撹拌で良分散状態に戻り容易に流動可能となる軟凝集性スラリーの調製を試みた。本研究では,高分子電解質分散剤を用いていったん粒子を良分散状態とした後,多価イオンを添加して粒子表面の高分子分散剤をイオン架橋させた。これにより,低い降伏応力をもつ緩いゲルが形成され,軟凝集性スラリーの調製に成功した。このスラリーは,軽く振盪するだけで容易に流動状態へと移行し,時間が経過すれば再度ゲル状態に戻るという可逆性を有していた。さらに,ゲル化の度合いは添加する多価イオンの量で調整可能であった。</p>

<p>In this study, a novel reversible control method for particle dispersion/flocculation was developed with the dual aim of preventing settling/sedimentation during storage and maintaining low viscosity in use. First, a well dispersed slurry was prepared by adding polyelectrolytes as dispersant. After preparation, multivalent cations were added to the slurry. By adding multivalent cations, the well dispersed slurry was changed to gel state because of the ionic crosslinking of polyelectrolytes adsorbing on the surface of the particles. The resultant gel was very soft and could easily be changed to liquid state by shaking. In addition, the slurry reverted back to gel state after a certain period of time. The softness of gel can be controlled by additive amount of multivalent cations. Thereby, a novel reversible control method for particle dispersion state was successfully developed.</p>

Journal

  • Journal of the Japan Society of Colour Material

    Journal of the Japan Society of Colour Material 91(11), 357-361, 2018

    Japan Society of Colour Material

Codes

  • NII Article ID (NAID)
    130007537622
  • NII NACSIS-CAT ID (NCID)
    AN00354634
  • Text Lang
    JPN
  • ISSN
    0010-180X
  • NDL Article ID
    029358886
  • NDL Call No.
    Z17-211
  • Data Source
    NDL  J-STAGE 
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