硬化エラストマー 貝類に由来する鉄カテコール複合体
Emmanouela Filippidi1,2, Thomas R Cristiani1,3, Claus D Eisenbach1,4
1Materials Research Laboratory, University of California, Santa Barbara, CA 93106, USA.
Science (New York, N.Y.)
|October 28, 2017
まとめ
エポキシネットワークを強化し 伸縮性を犠牲にすることなく 硬さと強さを高めます この突破は 材料の限界を克服し より強く 頑丈で 伸縮性のある材料を生み出します
科学分野:
- 材料科学
- ポリマー化学
- バイオミメティック素材
背景:
- 材料はしばしば硬さと伸縮性の間のトレードオフに直面します.
- エラストモアのクロスリンク密度を増やすと強度が向上するが,頑丈性が低下し,脆性が生じる.
研究 の 目的:
- 材料の硬さ-伸縮性のトレードオフを回避するために
- マリン・ミッスル・ビッシ・キューティクルに 触発された新素材を開発する
主な方法:
- 乾燥した,緩やかな交結のエポキシネットワークに,犠牲の,可逆の鉄-カテコールクロスリンクを組み込む.
- 鉄を含む網の機械的性質を,その鉄のない前体と比較する.
主要な成果:
- 鉄を含むエポキシ網は 2~3倍の硬さ 張力強さ 張力強さを示した.
- 材料は元の伸縮性を保ちながら 回復可能なヒステリックエネルギー分散を得ました
- ネットワークの乾燥した性質は,クロスリンクとイオノメリックナノドメインの協力的な効果を通じて,プロパティの強化を強めた.
結論:
- リバーシブルな鉄・カテコール・クロスリンクは,ポリマーネットワークに固有の硬さ-伸縮性のトレードオフを効果的に克服します.
- 優れた機械的特性を持つ高度な材料を設計するための バイオミメティックアプローチは有望な戦略です
- 金属-リガンド協調複合体で機能化されたドライポリマーネットワークは,著しく性能が向上しています.
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