像花一样的共价有机框架,用于在环氧涂层中提供卓越的耐腐蚀性和耐久性
Parisa Najmi1, Navid Keshmiri1, Mohammad Arjmand1
1School of Engineering, Faculty of Applied Science, University of British Columbia, Kelowna, British Columbia, V1V 1V7, Canada.
Small (Weinheim an der Bergstrasse, Germany)
|July 14, 2025
概括
使用二硫化和共价有机框架 (MDS-COF-Zn) 的新纳米容器有效加载腐蚀抑制剂. 这种混合材料提供了长期的屏障保护,并提高了涂层的耐用性.
科学领域:
- 材料科学 材料科学 材料科学
- 腐蚀科学 腐蚀科学
- 纳米技术纳米技术
背景情况:
- 开发用于腐蚀抑制剂的有效纳米容器对于金属保护至关重要.
- 挑战包括实现高负载能力,可控释放和长期屏障保护.
- 优化纳米容器分子结构和形态是克服这些挑战的关键.
研究的目的:
- 设计和合成新型纳米容器,以增强腐蚀抑制.
- 为了研究由二硫化和充满酸的共价有机框架组成的混合材料的特性.
- 评估这些纳米容器在保护金属表面和改善涂层性能方面的性能.
主要方法:
- 从二维六角纳米片合成一个3D花样共价有机框架 (TP-TA COF).
- 在二硫化物 (MDS) 上通过一阶段溶热过程增长COF,形成MDS-COF.
- 将酸装入MDS-COF结构中,以创建MDS-COF-Zn纳米容器.
主要成果:
- 新型MDS-COF-Zn表现出极好的耐腐蚀性,24小时后电荷传输电阻为72,000 Ω.cm2.
- 在液电解质中观察到超过3000小时的异常屏障保留.
- 这种材料显著提高了环氧涂层的性能,包括附着强度 (4.80 MPa) 和抗拉强度 (46.50 MPa).
- 经过120小时的加快气候变化,没有发现颜色变化,这表明它的稳定性很高.
结论:
- 开发的MDS-COF-Zn纳米容器为腐蚀抑制提供了耐用且有效的解决方案.
- 这种混合材料显示出长期活性屏障保护和增强涂层性能的潜力.
- 这些发现指导了先进的混合腐蚀抑制剂和相关纳米材料的设计.
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