用Catechol修饰的环氧粘合剂制备的钢接头的界面研究,具有增强的粘合性能和耐久性
Gaoming Li1,2, Yeping Wu1, Ping Zhang3
1Institute of Chemical Materials, China Academy of Engineering Physics (CAEP), No. 64 Mianshan Road, Mianyang 621900, China.
Langmuir : the ACS journal of surfaces and colloids
|July 24, 2024
概括
与传统粘合剂相比,一种新的甲基醇改性环氧粘合剂 (CMEA) 在潮湿条件下表现出优越的粘合强度和耐用性. 这一创新为不钢等材料在苛刻的环境中提供了更高的性能.
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
- 表面工程是什么?表面工程是什么?
背景情况:
- 粘合剂在航空航天和汽车工业中至关重要,但在炎热,潮湿的条件下会降解.
- 目前的处理方法,如化,对环境有害,与钢材不相容.
- 开发出适用于充满挑战的环境的坚固粘合剂是必不可少的.
研究的目的:
- 合成和评估一种新型的甲基醇改性环氧粘合剂 (CMEA).
- 评估CMEA在不钢 (SS) 上的粘合强度和耐老化性能.
- 阐明CMEA增强性能背后的界面机制.
主要方法:
- 用改性环氧粘合剂 (PMEA) 和原始环氧粘合剂 (EA) 制备CMEA并进行比较分析.
- 在SS.上评估水下结合强度的评估.
- 在50°C下进行32天的热水衰老试验.
- 使用X射线光电子光谱 (XPS) 蚀刻进行接口分析.
主要成果:
- 在SS上,CMEA的水下结合强度 (13.0 MPa) 显著高于PMEA和EA.
- 在老化后,CMEA保留了73.9%的初始强度,超过PMEA (59.8%) 和EA (11.4%).
- 对XPS的分析显示,CMEA-SS接口的基基增加,表明增强的结合.
结论:
- katekol 修饰显著改善了环氧粘合剂的粘合和老化性能.
- 增强的性能归因于在粘合剂-基板接口上增加了基团密度.
- 这项研究提供了一种可行的策略,用于设计高强度,耐用粘合剂,用于苛刻的应用.
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