...This is thought to be due to specific adsorption to the particle interface; adding a small amount of it acts as a partial shield for the charge and a bridge between particles, but adding a large amount covers the particle surface and makes the particles hydrophilic. Those that exhibit a sensitizing effect are used as coagulants, and those that exhibit a protective effect are used as protective colloids. Gum arabic and gelatin have long been well-known as protective colloids, but recently carboxymethyl cellulose and polyvinyl alcohol have also been used. *Some of the terminology that refers to "protective colloid" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…これは粒子界面への特異的吸着によると考えられ,少量の添加は荷電の部分的遮へいや粒子間の橋架けとして働くが,多量の添加では粒子表面をおおい粒子を親水性とするためである。増感作用を示すものは凝集剤として,保護作用を示すものは保護コロイドprotective colloidとして利用される。古くから保護コロイドとしてアラビアゴム,ゼラチンが有名であったが,最近ではカルボキシメチルセルロース,ポリビニルアルコールなども用いられる。… ※「protective colloid」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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