二酸化炭素のための新しいリン酸性フッ素表面活性剤である
Jason S Keiper1, Ruma Simhan, Joseph M DeSimone
1Forschungszentrum Jülich GmbH, Institut für Festkörperforschung, D-52425 Jülich, Germany.
Journal of the American Chemical Society
|February 28, 2002
まとめ
アニオン酸塩フッ素表面活性剤は,二酸化炭素中のマイクロエムルションに自己組み立てられ,かなりの量の水の吸収を可能にします. 小角中性子散乱は,このユニークな表面活性物質/水/CO2溶液中のナノメートル規模の集積物の形成を確認した.
科学分野:
- 超分子化学とは
- コロイドと表面科学
- グリーン・ケミストリー (Green Chemistry) とは
背景:
- フッ素表面活性剤は,水以外のシステムの安定化に不可欠です.
- 二酸化炭素 (CO2) は,ユニークな性質を持つ環境に優しい溶媒です.
- マイクロエムルションは,溶解性と反応環境を向上させます.
研究 の 目的:
- CO2におけるアニオン酸塩フッ素表面活性物質の自己組み立てを調査する.
- これらの表面活性物質がCO2中の水マイクロエムルションを形成する能力を決定する.
- 形成された集積物の構造を特徴付けるために.
主な方法:
- 鎖構造が異なるアニオンリン酸フッ素表面活性物質の合成.
- 水,CO2,フッ素表面活性物質を用いたマイクロエムルションの製造.
- 構造分析のための小角中性子散射 (SANS).
主要な成果:
- アニオンリン酸フッ素表面活性剤は,CO2で自己組み立てに成功しました.
- 2つのフッ素連鎖または1つのフッ素連鎖と1つの炭化水素連鎖を持つ表面活性剤は,水分吸収を大幅に促進しました.
- SANSは,ナノメートルのスケールの集積物の形成を確認し,マイクロエムルション構造を示しました.
結論:
- アニオン酸塩フッ素表面活性剤は,CO2中の水マイクロエムルションを作成するのに有効です.
- これらのマイクロエムルションは,超臨界のCO2で水分を運ぶ能力が顕著である.
- この研究は,CO2を反応媒介として利用するための新しいアプローチを示しています.
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