用键结的纠阻塞了凝-弹性体混合体的界面裂
Zibi Wang1, Fahu Yang1, Xiaoxu Liu1
1School of Chemical Engineering and Technology, Xi'an Jiaotong University, No. 28, Xianning West Road, Xi'an, Shaanxi, 710049, China.
Advanced materials (Deerfield Beach, Fla.)
|January 25, 2024
概括
研究人员开发了一种新的键钉纠 (Hb-En) 结构,以防止无形水凝涂层的界面裂. 这一策略提高了耐用性,并为先进的弹性体应用提供了强大的水性滑.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物科学 聚合物科学
- 表面工程是什么?表面工程是什么?
背景情况:
- 无形水凝具有水性滑的潜力,但在负载下遭受界面裂传播.
- 这种故障机制限制了水凝涂层在弹性体上的实际应用.
研究的目的:
- 开发一种通用策略,用于无形水凝-弹性体接口中的接口裂被动化.
- 为了提高水凝涂层的界面性和耐疲劳性.
主要方法:
- 在无形水凝中设计一个键钉纠 (Hb-En) 结构.
- 固定聚合物纠使用共价类键来创建Hb-En结构.
- 在单次和循环负载条件下调查裂传播.
主要成果:
- 实现了高界面性超过1650Jm-2.
- 证明了423 J m-2的极好的界面疲劳值.
- 在各种负载条件下成功抑制了界面裂的传播.
结论:
- Hb-En 结构有效地移除压力,提高断裂能量屏障,防止裂的传播.
- 这一策略是普遍适用于各种弹性体材料和任意形状.
- 由此产生的水凝涂层表现出持久的水性滑,由于疲劳裂纹不敏感,摩擦力低.
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