ブラシ内の分散は,そのインターフェイス特性を決定する上で重要な役割を果たす:オリゴキサゾリンベースの移植ポリマーのケース
Matteo Romio1,2, Benjamin Grob2, Lucca Trachsel3
1Biointerfaces Lab, Swiss Federal Laboratories for Materials Science and Technology (Empa), Lerchenfeldstrasse 5, 9014 St. Gallen, Switzerland.
Journal of the American Chemical Society
|November 5, 2021
まとめ
移植ポリマーのサイドチェーンの異質性は,ブラシの水分化とインターフェイス特性に大きな影響を及ぼします. サイドチェーンの長さと分散度が異なるポリマーは,水分化され,粘着性が低く,潤滑性のあるフィルムを生成します.
科学分野:
- ポリマー科学
- 材料科学
- 表面化学
背景:
- 移植されたポリマーは バイオマクロモレキュルを模倣しますが 自然な構造の純度が欠けています
- 合成ポリマーのサイドチェーンの異質性はよく理解されていません.
- ポリマーブラシのインターフェイス特性は,様々な用途に不可欠です.
研究 の 目的:
- サイドチェーンの異質性がポリマーブラシの特性に与える影響を調査する.
- サイドチェーンの長さと分散が水分とインターフェイスの振る舞いにどのように影響するか示します.
- 制御されたサイドチェーン構造を持つ移植ポリマーを合成し,特徴づけること.
主な方法:
- オリゴ2-エチル-2-オクサゾリン) メタクリラート (OEOXMAs) をカチオン環開きポリメリゼーション (CROP) による合成.
- コラムクロマトグラフィを使用して特定の長さ (n) の離散型マクロモノマーにOEOXMAの浄化.
- 浄化されたOEOXMAを,反転性添加-断片化鎖移転 (RAFT) ポリメタクリlate (POEOXMA) にする.
- 金の表面にPOEOXMAを組み立て,プラストポリマーブラシを形成する.
- 変角スペクトロスコーピックエリプソメトリー (VASE),分散式クォーツ結晶マイクロバランス (QCMD),原子力顕微鏡 (AFM) を使用してブラシの性質を特徴づける.
主要な成果:
- 移植ポリマー内のサイドチェーンの分散は,ブラッシュの水分化に大きな影響を与えます.
- 異質なサイドチェーン構造は,均質なものと比べ,より水分化されたポリマーブラシにつながります.
- サイドチェーンの分散性が異なるポリマーブラシは,粘着性が低下し,潤滑性が向上します.
- これらの異質なブラシは,改善された生体受容性を示しています.
結論:
- サイドチェーンの異質性は,ポリマーブラシの特性を調整する重要な要因です.
- サイドチェーンの長さと分散の制御された変動は,高度なインターフェイス材料を設計するための経路を提供します.
- この発見は バイオマテリアル,コーティング,センサーの設計に 影響を及ぼします
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