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碳点辅助的Mg-Al分层双氧化分散在水载环氧涂层中,具有增强的防腐蚀保护

Mengmeng Zhou¹, Qiuhong Guo², Chun Wang¹

¹Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Molecular Sciences, Henan University, Kaifeng, Henan 475004, China.

Langmuir : the ACS journal of surfaces and colloids

|March 5, 2026

概括

功能化层级双氧化碳点 (LDH-Cdot) 纳米混合体增强抗腐蚀涂层. 这种具有成本效益的方法改善了分散性,并显著提高了对金属腐蚀的涂层性能.

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:

像石墨烯和MXene这样的二维分层纳米材料是有机涂层中防止腐蚀的重要增强填充剂.
这些纳米材料在聚合物矩阵中的分散状态极大地影响了涂层性能.

研究的目的:

开发一种简单,具有成本效益的方法来合成功能化的层级双氧化碳点 (LDH-Cdot) 纳米混合体.
为了评估这些新型纳米混合体的涂料的抗腐蚀性能.

主要方法:

富含carboxyl的碳点 (Cdots) 通过热解合成,并引入LDH画廊,形成LDH-Cdot纳米混合体.
纳米复合材料LDH-Cdot被纳入水载环氧基质,以创建耐腐蚀涂层.
电化学阻抗光谱 (EIS) 和局部电化学阻抗光谱 (LEIS) 用于评估耐腐蚀性.

主要成果:

与纯LDH相比,LDH-Cdot纳米混合体表现出明显改善的水分散.
LDH-Cdot环氧涂层表现出优异的耐腐蚀性,阻抗模量在0.01Hz下降,在LDH-Cdot环氧 > LDH环氧 > 纯环氧的序列中.
经过90天的浸泡,LDH-Cdot环氧涂层保持了4.05 × 10^8 Ω·cm^2的高阻抗模量 (gadgadgadgadgadgadgadgadgadgadgadgadgadgadgadgadgad0.01 Hz).

结论:

合成的LDH-Cdot纳米混合物为涂料提供了增强的分散性和优越的抗腐蚀性能.
固定在LDH上的碳点通过与金属离子协调,促进了被动化层的形成,有效地减缓了腐蚀动力学.

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