ポリマーと表面活性物質の水性多相系は,自己組み立ての段階的梯子を密度で提供します
Charles R Mace1, Ozge Akbulut, Ashok A Kumar
1Department of Chemistry & Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States.
Journal of the American Chemical Society
|May 19, 2012
まとめ
研究者らは,ポリマーと表面活性物質を使用して,300以上の安定した水性多相システム (MuPS) を作成しました. これらのシステムは,密度に基づく混合材料の正確な分離を可能にします.
科学分野:
- 物理化学 物理化学
- マテリアルサイエンス 材料科学
- 分離科学とは,分離科学である.
背景:
- 水性多相システム (MuPS) は,水中のポリマーと表面活性物質の混合物から形成されます.
- これらのシステムは自己組み立てと熱力学的な安定性を示しています.
- 密度グラデーションの制御は,分離アプリケーションにおいて極めて重要です.
研究 の 目的:
- 多種多様な水性多相システム (MuPS) の生成を実証する.
- これらのMuPS内の密度グラデーションの性質を調査する.
- 密度に基づくオブジェクトの分離のためのMuPSの有用性を示します.
主な方法:
- 水性ポリマーと表面活性剤の溶液から300以上のMuPSの生成.
- フェーズ間の密度ステップグラディエンスの特徴化 (Δρ ≈ 0.001 g/cm3).
- グラスビーズと異なる密度のナイロンペレットを使用して分離の実証.
主要な成果:
- 2〜6段階の300以上のMuPSを成功裏に生成しました.
- 熱力学的に安定した,時間不変の密度ステップ・グラディエンスを,コソルトによって調節できる.
- 密度差に基づいて物体の効果的な分離を証明した.
結論:
- 水性多相システム (MuPS) は,安定した,鋭い密度グラデーションを提供します.
- これらのMuPSは,新しい分断および分離技術のために利用できます.
- 密度ステップを調整する能力は,材料分離のための新しい道を開く.
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