Fundamentals of Interface Chemistry for Understanding Dispersion/Aggregation of Micro-Particles

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  • ENOMAE Toshiharu
    Laboratory of Paper Devices and Eco-friendly Materials, Dept. of Appropriate Technology and Sciences for Sustainable Development Graduate School of Life and Environmental Sciences, University of Tsukuba

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  • 微粒子の分散・凝集を理解するための界面化学の基礎
  • 最新分散講座(第2講)微粒子の分散・凝集を理解するための界面化学の基礎
  • サイシン ブンサン コウザ(ダイ2コウ)ビリュウシ ノ ブンサン ・ ギョウシュウ オ リカイ スル タメ ノ カイメン カガク ノ キソ

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Abstract

When micro-particles are suspended in water, dispersion/aggregation behavior is dependent on an electrical double layer formed by counterions present near the interface between the particles and dispersing medium, water. The thickness of an electrical double layer is influenced by adsorption of ions dissociated from the substance composing the particles and various added electrolytes and non-electrolytes added, thus inducing dispersion or aggregation. The knowledge required for understanding fundamental dispersion technology is called the DLVO theory and will be explained in plain terms.

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