使用激光诱导的应力波激活界面机械孔
Journal of the American Chemical Society
|March 30, 2018
概括
研究人员开发了一种研究固体表面机械化学反应的新方法. 他们观察到-聚合物接口上的maleimide-anthracene机械体在149MPa以上的薄膜分离时集体激活.
科学领域:
- 材料科学
- 聚合物化学
- 表面科学
背景情况:
- 机械化学可以通过机械力量进行化学转换.
- 了解界面机械化学对于设计先进材料至关重要.
- 现有的方法往往缺乏控制和表征界面反应的精度.
研究的目的:
- 开发和验证一种用于激活和描述固体-聚合物界面上的机械化学转换的新方法.
- 研究化-聚合物界面上的maleimide-anthracene机制的机械值和反应机制.
- 将界面机械化学激活与溶液或散装聚合物的激活进行比较.
主要方法:
- 使用激光诱导的应力波在接口上产生可控的机械力.
- 在化-聚合物接口上对化-基因基因结.
- 使用光显微镜,X射线光电子光谱 (XPS) 和飞行时间二次离子质谱 (ToF-SIMS) 进行表征.
主要成果:
- 在高于149MPa的值压力时观察到机械激活,这与聚合物薄膜的裂变有关.
- 使用多种分析技术证实了机械的反 [4+2] 循环加法反应.
- 对照实验表明,共价附着对于界面激活至关重要,而在非固定标本中没有观察到激活.
- 与散装材料中观察到的比例应力依赖激活不同,表面间激活与薄膜分离一起发生.
结论:
- 使用激光诱导的应力波研究界面机械化学已经建立了强大的方法.
- 这项研究揭示了由聚合物薄膜分离触发的界面机制的独特集体激活机制.
- 这项工作为固体聚合物接口的应力依赖化学反应提供了基本的见解,为新材料设计铺平了道路.
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