液晶ポリウレタン/ポリアクリルエラストマーの相互浸透性,超強い機械的特性
Hai-Feng Lu1, Meng Wang1, Xu-Man Chen1
1School of Chemistry and Chemical Engineering, Jiangsu Province Hi-Tech Key Laboratory for Bio-medical Research, State Key Laboratory of Bioelectronics, Institute of Advanced Materials , Southeast University , Nanjing 211189 , China.
Journal of the American Chemical Society
|August 21, 2019
まとめ
新しい相互浸透性液晶弾性体 (LCE) 材料は,以前の制限を克服し,超強いアクチュエーションを示しています. LCEメカニクスのこの突破は,ソフトアクチュエータの広範な産業アプリケーションを可能にします.
科学分野:
- ポリマー科学と工学
- 材料科学
- ソフトロボティクス
背景:
- 液晶弾性体 (LCE) は何十年も研究されてきましたが,控えめなアクチュエーション力のために工業的なアプリケーションがありません.
- 主要な制限は,液晶 (LC) から同位相への移行時に発生する力から生じる.
研究 の 目的:
- 動作メカニズムを大幅に改善した新しいLCE材料を開発する.
- LCEベースのソフトアクチュエータの機械性能を改善することで,産業用アプリケーションのギャップを埋める.
主な方法:
- メインチェーンポリウレタンLCEと液晶ポリアクリlate熱固体を含む相互浸透ポリマーネットワーク (IPN) を合成した.
- 両方のネットワークを同時にポリマー化して 二重ネットワーク構造を作りました
- 材料の形状記憶の振る舞い,収縮比,アクチュエーションのストレス,作業能力,熱刺激下での機械的強さを特徴付けました.
主要な成果:
- 140 °Cで最大86%の収縮比を達成し,典型的なLCから同位相への移行を上回る.
- 証明された超堅固なアクチュエーションメカニズム:アクチュエーションブロックストレス (2.53 MPa),作業能力 (1267.7 kJ/m3),断裂強さ (7.9 MPa),弾性モジュール (10.4 MPa).
- この素材は 驚くほど 持ち運び力があり 体重の3万倍もの重荷を 背負うことができました
結論:
- 開発された相互に浸透するポリマーネットワーク-LCE素材は,前例のない機械的特性と双方向形状メモリ機能を備えています.
- これらの優れた特性は,LCEベースのソフトアクチュエータの実用的な産業用途への道を開くことで,LCEアクチュエータの以前の制限を克服します.
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