自愈聚氨弹性体具有优越的拉伸强度和弹性恢复,基于动态氧基-碳酸盐和键相互作用
Xue Wang1,2, Liguo Wang2,3, Chen Liu2
1School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 250022, China.
Macromolecular rapid communications
|May 5, 2024
概括
这项研究提出了具有特殊机械强度和透明度的新型自愈聚氨弹性体 (PUE). 这些先进的PUE表现出高的自我修复效率和可回收性,在柔性电子中提供了有前途的应用.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 纳米技术纳米技术
背景情况:
- 自愈材料对于延长产品寿命和减少浪费至关重要.
- 开发具有强大的机械性能和高效自我愈合能力的聚氨弹性体 (PUE) 仍然是一个重大挑战.
- 动态键提供了一个有前途的途径,以实现聚合物的自我愈合特性.
研究的目的:
- 设计和合成具有增强机械性能和高自我愈合效率的新型自愈聚氨弹性体 (PUE).
- 调查管理这些PUE的性能的结构-财产关系.
- 探索这些先进的PUE在柔性显示器和太阳能电池等领域的潜在应用.
主要方法:
- 合理的分子设计,将m-xylylene diisocyanate和可逆的二甲基胺作为硬片段,并将聚四甲乙烯乙醇作为软片段.
- 在硬片段内形成动态的氧化碳酸盐和键.
- 微相分离结构的特征,机械性能 (抗拉强度,性,弹性回收),透明度和自我愈合效率.
主要成果:
- 开发的PUE由于其微相分离结构,具有出色的透明度 (>90%).
- 实现了超高的抗拉强度 (34.5 MPa),令人满意的性 (53.9 MJ m-3),以及很好的弹性回收.
- 在70°C时表现出高达101%的自我愈合效率,这归因于动态可逆相互作用和聚合物链流动性.
- 自愈聚氨在回收后保持了高的机械性能.
结论:
- 为具有优越整体性能的自愈PUE制定了一种新的设计策略.
- 开发的PUE具有独特的机械强度,性,弹性,透明度和自我愈合能力的组合.
- 这些PUE显示出在先进领域 (如柔性显示器和太阳能电池) 应用的巨大潜力.
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