一个简单的策略,以构建可拉伸和热可逆双网水凝,具有低歇斯底里和高性,基于纠和键网络
Kun Lei1, Qixiu Jiang1, Xinling Wang2
1School of Medical Technology and Engineering, Henan University of Science and Technology, 263 Kaiyuan Road, Luolong, Luoyang, 471023, China.
Macromolecular rapid communications
|February 17, 2025
概括
这项研究开发了具有高性和低hysteresis的可伸缩双网水凝,用于可靠的循环载荷应用. 这些先进的水凝利用纠和联网来实现卓越的机械性能和回收.
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
- 生物材料工程 生物材料工程
背景情况:
- 高强度和低歇斯底里对于可靠的循环载荷拉伸式水凝至关重要.
- 由于固有的能量消散机制,同时实现这两种特性是具有挑战性的.
研究的目的:
- 合成可拉伸和可回收的双网 (DN) 水凝,克服高性和低歇斯底里之间的冲突.
- 为要求高的应用提供设计高性能水凝的新策略.
主要方法:
- 合成的DN水凝具有高度纠的第一个网络和与温度诱导的键 (HB) 相关的第二个网络.
- 使用可滑动纠和密集的HBs作为有效的交叉连接点.
- 研究的机械性能包括伸展性,抗拉强度,断裂性和歇斯底里.
主要成果:
- 实现了高拉伸性 (999%),拉伸强度 (0.82 MPa) 和破裂性 (4.51 MJ·m-3).
- 由于通过链条解和HB集群的能量消耗,证明了低歇斯底里 (在100%应变时为6.2%).
- 通过温度触发的HB网络的sol-gel过渡,展示了出色的恢复 (95.5%的应力恢复).
结论:
- 开发的DN水凝成功地使用纠和结合策略平衡了高性和低歇斯底里.
- 这些材料为需要强大可靠性能的循环装载应用提供了有前途的方法.
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