新しい逆ワーム型のミセラ系:有機液体中の胆塩とレチチンの混合物
Shih-Huang Tung1, Yi-En Huang, Srinivasa R Raghavan
1Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, Maryland 20742-2111, USA.
Journal of the American Chemical Society
|April 28, 2006
まとめ
研究者らは,有機液中の胆塩とレチチンを用いて,逆ワーム型のミセルを作製する新しい方法を発見した. これは,絡み合ったミセラネットワークを形成することによって,流体の粘度を大幅に高めます.
科学分野:
- コロイドと表面科学 コロイドと表面科学
- 材料化学 材料化学について
- 整形外科医 整形外科医 整形外科医
背景:
- リバースワームのようなミセルは,通常,水と非極性溶媒で形成されます.
- 有機液体のレシチン溶液は,一般的に粘度が低い.
- ミセルの形成を制御することは,流体の特性を調節する鍵です.
研究 の 目的:
- 水なしで逆ワーム状ミセルの形成のための新しい方法を開発する.
- ミケルの形成と流体リオロギーの胆塩の役割を調査する.
- ミセル構造と大量流体特性との関係を理解する.
主な方法:
- 非極性有機液体 (サイクロヘキサン,n-デカーン) のレシチン溶液に微量胆塩 (脱酸化塩酸ナトリウム) を添加する.
- 粘度の変化を決定するレオ学的測定.
- 微小角中性子散射 (SANS) 実験で,ミセルの成長を確認する.
主要な成果:
- 胆塩とレチチンを用いて逆虫状ミセルの形成のための新しい経路が確立されました.
- 胆汁塩は,その顔面のアンフィフィリシティにより,レシチン分子の縦断的集積を誘導した.
- レシチンオルガノソルの粘度が5倍以上増加したのは,絡み合った逆ミセルネットワークによる.
- 胆汁塩とレチチンのモラ比は,粘度向上を制御する重要な要因として特定されました.
結論:
- 胆汁塩は,有機媒体の微粒子の形成を逆転させるための効果的な構造指向剤として作用し,水の必要性を置き換えます.
- 逆ワームのようなミセルの一時的な,絡み合ったネットワークの形成は,レシチン溶液の粘着弾性特性を劇的に変化させます.
- この研究は,オーガノソルのレオロジカルな行動の設計と制御のための新しい経路を提供し,それに合わせたミセラ構造を介して制御します.
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